OLED screen or a major revolution into a laptop


No matter how high-end notebook computers, the screen is difficult to avoid the bottleneck, it is LCD and backlight system. Obviously, the liquid crystal needs to be back light to work, and the backlight lamp tube has the problem of uneven illumination and short life, which is far behind the self luminous OLED.

OLED in mobile phones, television has been a considerable success, of course, because of the high cost, OLED TV has the most outstanding display effect, but did not quickly spread. Relatively speaking, the size of the laptop screen panel is moderate, more easy to use OLED, bring a high contrast, high dynamic picture effect. To some extent, OLED is more meaningful than 4K resolution.

Still need some time to develop

Currently, the market has four OLED notebook, respectively, alien 13, Lenovo X1 Yoga ThinkPad, HP X360 Spectre 13 and Samsung TabPro S Galaxy. Of course, from the price point of view these products are not very close to the people, such as Lenovo X1 Yoga ThinkPad price reached $1650 (about RMB yuan).

Of course, the cost of any technology is constantly reduced. Digital t trends that 4K notebook costs continue to reduce is an example, 2016 will have more OLED notebook market, and 2017, OLED screen is no longer a symbol of high-end notebook, more high-end products, especially those outstanding video positioning products.


Samsung mobile phone stock soared high intelligent machines and panel will be reformed


Samsung products are no longer marketable, inventory flooded, creating unprecedented new high! It is understood that Samsung intends to compete for low-end phones and terrestrial plant market, inexpensive models will be equipped with high-end features. In addition, Samsung will be organized by the end of restructuring, rumors have 30% of high-end executives will pack up and walk.

Korea Herald (Korea Herald), the Korea Times (Korea Times), Yonhap reported on the 18th, Samsung Electronics buying miserable, filings show, Q3 until the end of the quarter, total assets amounted to 22.84 Stock trillion won ($ 19.4 billion) , the most in the history of the company. Industry sources said that since the beginning of this year, Samsung Electronics consumer electronics products, such as intelligent machines, television falling demand, rising inventories.

Samsung reportedly intends to play his ace, hold intelligent machines market share. Sources close to the situation, the next three weeks in the low-end phones, there may be “Samsung Pay” payment operations and fingerprint recognition. Only Samsung’s flagship Galaxy S series models, Note series, Part Galaxy A series of mobile phones equipped with fingerprint recognition capabilities. Samsung’s move is to ensure that low-end models of the company with the best specifications, and strengthen competitiveness.

Speculation, on the next year and a half, Samsung may have low-end phones Samsung Pay feature. Samsung Securities analyst Hwang Min-sung said that Samsung’s move to pay support Near Field Communication (NFC) and magnetic stripe sensing, Samsung is bound to join this feature parity models. However, the low-end machine also has high-end features that will increase the cost, margin compression, it will erode flagship machine sales, lest unfavorable gross margins, Samsung really do, worthy of observation.

At the same time, Samsung will announce organizational restructuring in early December decision, which could have great change, we understand that no money would have been the whole sector and simplify the organizational system, the top number will be greatly reduced. Insiders said that the number of directors will be reduced by three percent rise rumors, many executives will be forced to leave.

News and rumors that some of the previous agreement of the Department, the Korea Times (Korea Times) 8 日 reported that sources close to the situation, Samsung’s internal restructuring being hotly debated electronic business, if necessary, and the entire technology sector may be to streamline the structure and reduce costs. As intelligent machines and panel will be reformed. It is understood that the market is full of cheap phones, Samsung executives reached a consensus, no longer blind pursuit of sales growth. Vietnam plant will reduce production, reduce inventory better, save money.

Panel, the Samsung considering restructuring operations, changed to the higher price of OLED development as the main force. The source alleged that Samsung may spread inside the LCD sector will sell Chinese industry, but this is just a rumor at present. The source said that Samsung is concerned, LCD weak demand, reduce production quite reasonable.

2015–2022 Photonic IC market growth with a CAGR of 25.3%


According to Transparency Market Research’s latest report, in 2013 photonic integrated circuit (PIC) market reached $ 190 million, is expected from 2015 to 2022 will be 25.3 percent compound annual growth rate (GAGR) growth.

The main drivers of photonic integrated circuit market is through the integration of different optical elements (including detectors, modulators and laser) into a single package, to reduce costs and reduce the size. In addition, its advantages in efficiency, transmission speed, transmission capacity and power to help the market penetration to various vertical industries, such as metering, aerospace defense, health care, telecommunications, industrial and data communications and the like. In addition, the lack of digitization and photonic integrated design and packaging challenges, but also inhibits the rapid growth of photonic integrated circuits. We expected 2018 commercial quantum computing, will provide tremendous growth opportunities photonic integrated circuit market.

Three integrated photonic integrated circuit technology are: hybrid integrated, monolithic integration and module integration. Hybrid integrated photonic integration is the main integration technology, in 2013 56.8% of the global market revenue. Although hybrid integration in the forecast period is still the main integration technology, but monolithic integration will be the fastest growth is expected in the composite during 2015 to 2022 the annual growth rate will reach 26.5%. Furthermore, since the monolithic and hybrid integration of poor integration capabilities compared to module integrates revenue decline expected.

2013 indium phosphide (InP) and silicon on insulator (SOI) together accounted for 60.9% of the market revenue. Dominance of indium phosphide is primarily due to its ability to function will be integrated into the optical system photovoltaic chip. In addition, the advantages in size, speed, energy efficiency, manufacturing and packaging costs, but also further ensure its dominance. In different photonic integrated circuit assembly, in 2013 accounted for 29.3% of the laser largest share. Fiber amplifier (loss compensation by single photon of light elements, to achieve a high level of photonic integration) market will be the fastest rate of growth during the 2015-2022 compound annual growth rate of 26.6%.

2013 biggest market is the application of photonic integrated circuit optical communications, which accounts for 58.6% market revenue. In view of the increasing demand for data center applications, it is expected during 2015-2022 will still be the largest optical communications applications. Currently, the main application areas other sensors and biophotonics together account for 35.5% of revenue. Although the optical signal processing field current market share is very small, but with the post-commercial quantum computing, optical signal processing applications will maintain healthy growth.

2013 by region photonic integrated circuit market is the largest in North America, followed by Europe and Asia Pacific. Although North America is expected to in 2022 is still the largest market, the growth rate of health Asia-Pacific region will overtake North America and Europe. Growth in Asia Pacific was mainly attributable to the data center and biophotonics applications growing demand.

Global photonic integrated circuit market is highly fragmented, which is characterized with a large number of enterprises. Market leader in photonic integrated circuits including Infinera Corporation (USA), Alcatel-Lucent (France), Huawei Technologies Co., Ltd. (China), JDSU (USA), Avago Technologies Ltd (Singapore). Intel Corporation (USA) and the new fly-Optical Company (USA).

Largest PC maker Lenovo or suffered its first quarterly loss in six years

Beijing November 12, according to “The Wall Street Journal” online edition reported that Lenovo on Thursday announced a new season earnings. Due to the integration of Motorola’s mobile and IBM x86 server business after a massive writedowns, Lenovo is expected to suffer losses of more than six years in the first quarter.

Analysts said that despite the sharp decline in Lenovo shares, but in fact the company’s performance is stabilizing. Lenovo’s share price has fallen by 29 percent this year.
Largest PC maker Lenovo or suffered its first quarterly loss in six years

Profit expectations:

Acceptance Thomson One Analytics survey of 18 analysts on average expected a net loss last quarter, Lenovo’s expected $ 731 million, over the same period last year net profit of $ 262 million to achieve.

Revenue is expected to:

Analysts expect revenues for the quarter, Lenovo’s $ 11.8 billion, compared with $ 10.5 billion over the same period last year increased by 12.4%, partly driven by the acquisition of Motorola’s mobile and IBM x86 server business last year.

Noteworthy points:

– Writedowns. In August this year, Lenovo said it would be credited to the reorganization and intelligent machine inventory clean-up costs of $ 900 million in the quarter. Analysts expect the massive writedowns will drag Lenovo suffered more than six years of first-quarter loss.

– China’s economic growth slowed. Although the association is one of the manufacturers of consumer electronic products of China’s most globalized, but still 30% of its revenue from China. China is the second Lenovo Americas second largest market. With China’s economic slowdown, investors are waiting for Lenovo executives stand to see how they plan to deal with China’s economic “new normal.”

– Intelligent machine strategy. Lenovo’s future prospects is a key factor in intelligent machine business. Lenovo majority of its revenue from PC, but now moving to drive future growth bet. In the process of the integration of Motorola Mobile, Lenovo lost some share of intelligent machines, but analysts said the association also regain some share. Market research firm Strategy Analytics report shows that Lenovo the third quarter of the global smart machines share to 5.3% from 4.8% in the second quarter, but still less than 7.6% a year earlier.

– Cost reduction. Lenovo announced in August this year, as part of the second half of this fiscal year, $ 650 million cost-cutting plan, it will lay off 5% of the non-manufacturing sector. Investors are waiting for Lenovo announced more layoffs progress information.

– Server business. Since the acquisition of IBM x86 server business last year, Lenovo has been the integration of this business. Investors want to know the progress of consolidation, as well as whether the association recaptured in the integration process has been eroded rival business.

–PC. Although the association seeks to diversify, but Lenovo’s PC business is still the largest source of profits. Lenovo is the world’s largest PC manufacturer. Lenovo was in August showing the rate of decline of the PC market faster than expected. Therefore, investors want to know more information.

Ericsson, Nokia Huawei challenge Cisco all-round cooperation

According to foreign reports, Ericsson and Cisco announced Monday that the two companies will establish a wide range of technical and commercial relationship, from R & D to customer service and other areas of comprehensive cooperation.

Ericsson and Cisco said Nokia to spend 15.6 billion euros in the acquisition of Alcatel – Lucent after the company and the Chinese telecommunications equipment maker Huawei’s rise, giving them a tremendous competitive pressures. In view of this, Ericsson and Cisco will expand all-round cooperation, including joint development of the wireless network and Internet infrastructure commonly used products. The two companies said the alliance in 2018 to allow each company will add more than $ 1 billion in revenue annually.

In the fierce competition, and the acquisition become the norm in the market environment, select the alliance is an extremely rare practice. Ericsson and Cisco alliance, will also lead to political concerns on both sides of the Atlantic States. Because the highly sensitive security and privacy issues, these countries are desperate to closely monitor telecommunications equipment suppliers. Huawei has been blocked outside the US telecommunications equipment market, the main reason is a US Congress report said Huawei’s equipment will affect US national security.

Ericsson and Cisco alliance between telecommunications and Internet network to reflect the boundaries have become increasingly blurred, it also allows the two companies are considering how to market to deal with larger market. For Ericsson, Nokia because competitors strength, the alliance can help companies consolidate its position as the world leader in telecommunications equipment industry. Nokia completed the acquisition of Alcatel – Lucent after the transaction, the company will not only have the strength to challenge the Ericsson in the wireless equipment market, but also to attack the leader Cisco Internet devices.

Ericsson said the partnership with Cisco, allowing the company to immediately expand the range of products and services, faster than through acquisitions or Internet device developed faster the company. Ericsson CEO Hans Vestberg (HansVestberg), “said an alliance with Cisco, is more agile, more effective option. From tomorrow we can cooperate.”

Cisco said that, through an alliance with Ericsson, allows the company in the case of lengthy involvement in merger talks, quick access to larger markets, and cooperation does not produce too many business overlap. Cisco CEO Luo Zhuoke (ChuckRobbins) thereon, said, “This transaction allows us to expand our business worldwide, never touch the current market involved.”

Ericsson last year’s revenue of 228 billion Swedish kronor ($ 26.3 billion), employs about 11.624 people. The company currently has about 37,000 patents. Cisco’s fiscal year on revenues of $ 49.2 billion.

Ericsson has been developed over the Internet device, but the business has failed to have a big impact. For example, Ericsson in February this year, the telecom operators to launch its own brand of router, but so far the market still can not buy this product. At the same time, by network operators to roll out 4G slowdown and the impact of a price war, Ericsson’s core business – telecommunications equipment – have been subjected to great pressure.

Ericsson over the past few years has been single-handedly want to be like the new market expansion. The company in the past two years to develop a data center for use by the telecommunications operators. Ericsson said the new product is expected to be listed in the coming months, the product does not belong to an alliance with Cisco after the launch of new products.

Ericsson shares rose on Monday on the Nasdaq stock market in regular trading $ 0.16, up 1.63%, to close at $ 9.99. Over the past 52 weeks, Ericsson lowest price of $ 9.23, the highest price of $ 13.14. According to Monday’s closing price, market capitalization of about $ 32.5 billion of Ericsson. Cisco shares fell on Monday on the Nasdaq stock market in regular trading $ 0.27, down 0.95%, to close at $ 28.19. Over the past 52 weeks, Cisco minimum price of $ 23.03, the highest price of $ 30.13. According to Monday’s closing price, Ericsson’s market capitalization of about $ 143.4 billion.

Pan Lei Lin semiconductor semiconductor division announced the merger with new capabilities to boost semiconductor industry changes

Pan-lam from the Semiconductor Equipment Technologies, Inc. and Semiconductor Equipment Division Lei Technology, Inc. (Nasdaq: KLAC) today jointly announced a definitive agreement by both boards agreed by the Pan-Lin semiconductor stock exchange plus cash to acquire Division Lei semiconductor all the shares.

Branch Lei semiconductor shares held by existing shareholders will be entitled to a share in the form of half plus Fanlin semiconductor shares $ 32 redeemable, convertible ways to select all cash, all stock, or part cash and part stock. Details RO merger agreement will be based on the relevant content. According to the Pan-Lin semiconductor closing price October 20, 2015, the Pan-Lin will be $ 67.02 per share, semiconductor, or transaction value $ 10.6 billion acquisition of Branch Lei semiconductors.

The acquisition will have unmatched Fanlin semiconductor wafer process and process control capabilities, and by reducing the process variables, accelerate product manufacturing to achieve win-win cooperation with our customers, and ultimately help extend Moore’s Law, the semiconductor industry and improve overall process performance .

The transaction will involve regulatory approvals, as well as meet other customary conditions, it is expected to be completed in mid-2016. The combined company expects annual revenue will reach about $ 8.7 billion. If according to the non-GAAP (non-GAAP) basis, it is expected to the first 12 months after completion of the transaction Fanlin semiconductor earnings per share and free cash flow will increase. It will achieve within 18-24 months after the completion of the transaction value of $ 250 million in annual cost synergies, and because the merger brings product differentiation advantages and the company’s overall level of increase, is expected to 2020, the company’s annual revenue will an increase of approximately $ 600 million.

Chief Executive Officer Martin Anstice Fanlin Semiconductor president, said: “Pan Lei Lin semiconductor merged with the semiconductor division to further enhance the overall level of our industry-leading position in the wafer process and process control to help customers deal with the most serious challenge, to enable them to meet the market demand for lower power consumption, higher performance, and smaller size of the product. We both have a strong willingness to cooperate, and are committed to building strong customer confidence. In addition, our technology innovation , leadership and excellence in operations and other aspects of the product also has a good reputation. All this allows us to unite, to further enhance the differential advantage of technology, shorten product delivery time, helping customers achieve long-term success. ”

Chief Executive Officer Rick Wallace, president of the semiconductor division Lei said: “I firmly believe that this transaction is good news for the Interests Section of the key stakeholders who Lei semiconductors for customers, the combined company has a unique advantage, can help them. common challenges in the development of its fin field effect transistor (FinFET), multi-chip layout and 3D NAND chips are facing. At the same time, there is no overlap of products of both companies after the merger, and in the products and technologies also has a complementary, This is our employees who will be an excellent opportunity to benefit their professional development and growth. In addition, the transaction for our shareholders, but also significant, they are not only able to obtain substantial upfront value, there will be future industry leaders the opportunity to hold shares of companies, and to profit from the growth potential of the exchanges brought in. ”

Significant strategic and financial benefits

1, To create a leading semiconductor equipment manufacturers: a combination of outstanding ability Fanlin semiconductor deposition, etching and cleaning aspects, as well as leading-edge semiconductor division Lei in the detection and measurement of aspects of the company’s future continued to provide outstanding performance broader platform.

2, Accelerate innovation: the merger has brought more opportunities to enhance the production and R & D capabilities, enabling companies to better help our customers meet the challenges of escalating technical and economic aspects.

3, Strengthen market-correlated: the two companies a comprehensive and complementary product portfolio of the combined company brings a diversity of products in the market segments, expanding the market size and market capitalization, thus creating opportunities for technological innovation.

4, Significant cost and revenue synergies: expected within 18-24 months after the completion of the transaction, this acquisition will realize a pre-tax annual cost synergies worth approximately $ 250 million and until 2020, the company’s annual revenue increase of about 6 billion.

5, Revenue increased: according to the non-GAAP (non-GAAP) basis, the first 12 months after completion of the acquisition, the pan-lam from the Semiconductor’s earnings per share and free cash flow will increase.

6, Strong cash flow: a memory chip and logic chip customer base, strong operational strength, as well as considerable revenues complementary to both sides, will be able to bring strong cash flow for the combined company.

Anstice concluded: “Branch Lei semiconductor is through its staff of nearly 40 years of efforts to gradually build up our corporate culture of the company, technology, and the way they operate and so have a very high respect for our two companies have ‘customers. first ‘this common core values, combined with complementary technologies, I am confident that after the merger we will become a trusted industry leader, and create opportunities for profitable growth, bringing great value to all stakeholders in the company. We can say that we are at the right time to do the right decision. “

MEMS gyroscopes require a combination of other sensors Euler angles and quaternion expressions Attitude

It is understood that the UAV flight control system includes the following sections: gyroscopes, accelerometers, magnetic sensors, GPS module and a control circuit, and its main function is to automatically keep the aircraft’s normal flight attitude. Flight control system directly determines the UAV in flight stability, reliability, controllability and safety, MEMS gyroscopes, as part of this, the majority of respondents said MEMS gyroscope is expected to become UAV Flight Control System gyro standard, then, first of all to look at compared to other MEMS gyroscope gyroscope What advantages.

Wang Yi concluded: “MEMS gyroscopes advantages: (1) lower aircraft costs and promote the vigorous development of market applications; (2) reduce the weight of UAVs, reduced power consumption, improved flight time; (3) MEMS technology to integrate more sensors, is conducive to the precise attitude control deficiencies: poor compared to fiber optic gyroscopes, laser gyroscopes, MEMS gyroscope zero drift and precision. ”

Jinliang think, MEMS gyroscopes have obvious advantages, but there are some limitations. “MEMS gyroscopes to make the UAV attitude and a more stable and accurate navigation, while its power consumption is lower. And MEMS gyroscopes costs are coming down, getting smaller, and the dynamic range is expanding more. Overall, smaller and integrated sensor axes, are more conducive to the UAV attitude perception, of course, there are also disadvantages, for example not fast enough, the accuracy is not high enough, and the maximum measuring range there are some limitations. ”

Jinliang said MEMS gyroscope limitations, mainly due to the current MEMS technology. But these can not affect the MEMS gyroscope in UAV flight control system is used to achieve a balance control and auxiliary aircraft navigation of its importance.

According to the Shenzhen Otani Co., Ltd. (hereinafter referred to as “Otani Technology”) CEO Peng Mao-roots representation, in a variety of unmanned aerial vehicles, both military unmanned aerial vehicles, UAVs civilian medium, individual small aerial drones, unmanned aerial vehicles flight control system is the core, at the same time to achieve reliable control, stable and flexible one of a UAV is a measure of whether a sign of success. In order to achieve a stable and flexible flight control, UAVs must be integrated include gyroscopes, accelerometers, tilt sensors, airspeed sensors, barometric altimeter and other sensors, during the flight coprocessor their posture and precise adjustment control, which gyroscope played a significant role.

According to Wang Yi introduction, the flight control system is the sum of all parts and devices used to transfer all manipulation instruction, driving rudder movements on UAVs. Flight control system consists of airborne and ground control part two parts, which include some of the major airborne sensors, steering gear and flight controllers. Flight control system is the core part of the overall UAV airborne equipment, flight control system can work, a direct impact on a variety of performance and flight safety UAV flight.

“In the flight control system, mainly using MEMS gyroscope measurements during the flight pitch angle and roll angle, but generally require complex MEMS accelerometers, because each sensor has certain limitations.” Wang Yi explained, “For example, , MEMS gyroscope measures the angular velocity, the angle through the points in order to get in the process of integration, since the zero drift influence is bound to introduce cumulative error, the longer the integration time, the greater the error. So, which requires the use of another A MEMS sensor calibration MEMS gyroscopes. Since there is no integrated error MEMS accelerometer, so in relatively quiescent conditions can be corrected MEMS gyro error. With MEMS technology continues to mature, the current MEMS gyroscopes and accelerometers are integrated in Together, commonly referred to as 6-axis combination sensor key technologies involved in this include hardware (a combination of 6-axis sensor) and software (filtering algorithms, attitude / navigation algorithms, etc.) in two parts. ”
Xie Zhifeng also believe MEMS gyroscopes and other sensors will be used in conjunction with: “no chance at least Configuration ‘gyroscope + accelerometer’ six-axis sensor assembly, high-end configuration no chance ‘gyroscope + accelerometer + magnetic sensor’ nine-axis sensor data combination, and integrated six-axis / 9-axis fusion / attitude stabilization algorithm. “In addition to the actual accelerometer, there magnetometer and GPS assisted correction.

Similarly Jinliang said, MEMS gyroscope must be fused with other sensor data, due to the MEMS gyroscope does not provide absolute reference, therefore, how to obtain a more accurate real-time stabilized attitude information from the MEMS gyroscope with noise data become flight control systems need to break the current focus. Gyro drift will have to work long hours and integral error, short-term response to acceleration fast enough, they would receive outside interference, therefore, generally will gyroscopes and accelerometers integrated with the use, of course, there are used separately, and then by the flight control software for both complementary.

Of course, there are exceptions, Shanghai Shen Di Semiconductor Co., Ltd. (hereinafter referred to as “Deep Di”), vice president of marketing Huangyan put forward their own views, he believes that if the zero impartial stability index MEMS gyroscope low to a certain extent, then, such as low in 0.1deg / h, then the MEMS gyroscopes can be used alone, and this indicator MEMS gyroscope can also replace the magnetic sensor, by measuring the Earth’s rotation either the north.

As MEMS gyroscope is used in conjunction with other sensors how to balance control and auxiliary navigation, Jinliang detailed explanation to reporters: “For example, three-axis accelerometer and three-axis gyroscope (angular velocity) concurrent transmitted to the microcontroller or DSP processing, and then the posture by the microcontroller or DSP solver (such as quaternions), to solve the current aircraft pitch, roll and yaw angle of the three, and then through the PID control operation in accordance with these three angles, four PWM outputs to control four motors ( UAV in terms of four-axis) acceleration and deceleration to achieve the equilibrium state hovering UAVs. ”

Jinliang also stressed that because MEMS gyroscope capable of measuring angular velocity along one axis or several axes motion, and with the MEMS accelerometer (accelerometers) are formed complementary advantages, a combination of accelerometers and gyroscopes two sensors can be better full motion tracking and capture three-dimensional space, in the absence of GPS or GPS data update interstices, by a combination of gyroscopes and accelerometers to aid navigation.

According to Wang Yi introduced a system of independent control input dimension is less than the degree of freedom of the system, then the system is called under-drive system. Axis UAV has four separate inputs, which consists of four independent motor-driven propeller, while the fuselage with six degrees of freedom of the change, so the UAV axis is a typical under-drive system. Four-axis control algorithms for unmanned aerial vehicles, the effect relatively good linear quadratic optimal control, backstepping control, PID control, sliding mode control.

Wang Yi also explained the MEMS gyroscope is how to achieve a balance control. “Axis UAV in the air flying, aircraft flight direction and flight speed is determined by the inclination of the aircraft, the aircraft tilted towards which the aircraft will be flying in any direction, the greater the inclination angle of the flight faster. By adjusting the rotational speed can be adjusted for each propeller UAV flight attitude. “he said.

In UAV flight control system, when the use of the accelerometer MEMS gyroscopes fit, not the lack of algorithms. According 赵延辉, currently the most commonly used algorithm is complementary filter, Kalman filtering and SINS, simply means that the use of sensor fusion MEMS gyroscopes, accelerometers and magnetometers, etc., in different scenarios, using different weights calculates the pitch angle, roll angle, heading angle changes, and then through PID control to achieve balance control.

The output value can be more precisely accurate representation of the UAV flight status. According to Jin-liang introduction, UAV flight status output value of the four elements, Euler angles, direction cosine matrix of three, where the advantages of the four elements that facilitate the calculation of the difference, but unfortunately it is difficult to directly represents the rotation, and the direction cosine matrix The coefficient too much, it is difficult to interpolation; Euler angle expression, although relatively more simple, however, the problem of the existence of universal lock.

Wang Yi also introduced the flight attitude of presentation: “The UAV axis attitude control, we must first be expressed in gestures, posture currently used expressions have Euler angles and quaternion two ways, Euler angles represents more intuitive but during the rotation matrix calculations large amount of calculation, and quaternion rule overcome this disadvantage. Second, we must be detected on the attitude, the attitude detection mainly to MEMS gyroscopes, MEMS accelerometers and other sensors for the angular velocity the measurement value of the acceleration is converted to a preliminary estimate posture, and then after filtering algorithm for data integration. Finally, the appropriate choice of control algorithm to control the attitude. ”

MEMS gyroscopes known UAV in terms of essential, in combination with other sensors can be more accurately stated UAV flight attitude from the above, then, for four axis, six-axis, multi-axis unmanned eight shaft machine is concerned, to take a few MEMS gyroscope is better? Is the more MEMS gyroscopes wing more use of?

On this issue, according to Wang Yi explained that the UAV generally use a three-axis multi-axis MEMS gyroscope, the main task is to control the posture sensing and navigation. If the head is mounted for aerial photography, you can also use a MEMS gyroscope on the head, for the camera’s image stabilization shooting. In multi-axis UAV, the more the wing is not more used MEMS gyroscopes.
Jinliang also believes that, in general, the UAV is to take a MEMS gyroscope, but the use of two individual. In order to ensure that the aircraft stable in three axes. Flight control software to coordinate them. Using several gyroscope on the plane almost no relationship with the number of wings. Generally use only a three-axis multi-axis gyroscope. For example, our latest product Mirage Mirage on the use of a UAV three-axis gyroscope.

Yanhui Zhao also explained to reporters: “Usually the least use one, do body smooth control and navigation assistance there is also two and a smooth control and an auxiliary make navigation of the fuselage, a smooth control of the camera frame to do, of course. For different reasons, there are many more, such as different application scenarios, start a different range of gyroscopes. Also by a show of hands algorithms to improve reliability of the system, then you may need a 3- axially 5 gyroscope. ”

MEMS gyroscope that measures the angular velocity of the UAV, but since the output value of MEMS gyroscope angle needs to get through the integration, requiring the acceleration sensor effective to correct it. But, nevertheless, when the UAV is in flight state, the accuracy of the acceleration sensor has been reduced because they measure the gravity and external forces, therefore, reduce the vibration intensity UAVs, will be able to increase the accuracy of the MEMS gyroscope and the output value of the acceleration sensor.