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Application of MEMS in medium precision to navigation system

Item No.: WLS093
- ± 1g ± 200g to the measuring range
-The stability and long-term bias
- low error rectification
- ultra small 20 pin LCC package sealing ceramic
(8.9mm, x, 8.9mm)
-Under harsh environment
-Small size.
-Lead-free welding technology and SMD / RoHS compliant mount
Medium precision navigation systems (IMU), AHRS, and control systems require gyroscopes and accelerometers to come
The position of a moving object in a free space is predicted. The accelerometer is used to initialize and correct the drift of the gyro in motion
Here we compare the main parameters of the Colibrys ±10g accelerometer MS9010.D and RS9010. Now the direction of development, mainly to support the system designer and accelerometer as the best selection guidelines. The four main parameters were compared, including the bias repeatability, scale factors, bias long-term repetitive non aligned axis error.RS9010.A error and vibration rectifier is better than that of 5mg, while the scale factors of the beginning of the RS9010.A sample repeatability is better than that of 1.5mg.MS9010.D and RS9010.A is 150ppm. to 400ppm, in addition, can RS9010.A rectifier vibration error is better than 100 - g/g.
Colibrys considers all kinds of needs, provide a large number of accelerometers for AHRS manufacturers, from the standard MS9010.D and MS9005.D, they have the best price than that to RS9010.A later, as the best choice for high performance of the system. The range is + 2G to + 200g between various options.
Inertial accelerometer is the main choice of product differentiation bias long-term repeatability, scale factor stability and non alignment error of the axis. These parameters are very important, because the output signal of any offset will be integrated with time two times, to determine the location. For a flying object, high speed flying for a few minutes, it could be transformed into a large position error. In addition, many times according to the experience of installation of the accelerometer, the environment will have some due to vibration near the engine or any other source. The output signal of the vibration sensor influence called vibration rectification errors. For many applications, the product has a very low sensitivity to external vibration is the most important.
Colibrys number of years MS8010.D and updated MS9010.D and MS9005.D for mid high precision navigation system and AHRS application of the standard. The total long-term bias stability is better than that of 7.5mg± 10g ± 5g is better than 3.75mg, at the same time, the scale factor repeatability is better than 400ppm. Figure 1 shows the measurement results of MS9000.D various range a year bias stability.
MS9000 has clearly showed excellent impact resistance, stability and long-term impact of the ability to use application of many difficult to impact and easy to operate in. Even developed a special anti shock (20'000g) HS8000 and HS9000).
Application specification
RS9010 accelerometer
In order to meet the new requirements of high-end, Colibrys is currently developing a new technology platform, called IRIS. It is a new type of MEMS sensor, the open-loop ASIC and a temperature sensor placed in the standard 20 pin LCC package in.RS9010.A​ ​ is a± 10g amount of accelerometer for high precision, AHRS, design range and manufacturing.
Including the three major improvement IRIS Technology: design the new MEMS sensor, MEMS and electronic assembly technology to improve the interface. The new MEMS element is designed for obtaining high bias and scale factor stability and design. It has passed on the physical and mechanical sensor understanding, analysis on the promoting mechanism of drift, then the design of sensor can resist these mechanisms has made the latest manufacturing technology successfully.IRIS the use of MEMS, such as DRIE and silicon fusion bonding technology (SFB). These are the achievements of the manufacturing process of unified and highly predictable, with high yield, high degree of repeatability of results.
The following table shows the RS9010.A&#8203 four; ​ the early performance of the accelerometer. We can see that the total impact bias and long time after aging drift including hysteresis, stability of 1.5mg. is better than the scale factor is lower than that of 150ppm. in RS9010.A was worse than the error rectifying vibration electromechanical (Q-Flex) specifications. These ensure the comprehensive performance RS9010.A is one of the most suitable choice for future high performance AHRS.
Application specification
The chart clearly shows that compared to RS9010.A ​ the superior performance of ​ MS9010.D, the performance of the product is improved. A few charts below, will be further illustrated in the whole temperature range, long-term temperature coefficient &#8203 of the improved performance of the RS9010.A; ​, and improved the performance of long-term stability.
Colibrys has been developed and the supply of different accelerometer, including specially designed for high precision navigation system mid (IMU) and AHRS design. The overall long-term bias stability of about 5mg MS9010.D and MS9005.D proposed a best price for the standard AHRS. They focus on the general navigation aid, including small jets, aircraft, backup solutions and unmanned aerial vehicles (UAV). This is the best way to solve the application in shock and vibration under harsh environment.
UAV case
Is currently in the development of RS9010.A, the long-term bias repeatability overall goal for 1.5mg, has shown excellent vibration rectifying properties will be lower than 100, the value of - g/g (10g). The performance verification of the RS9010.A is one of the best choice for high precision AHRS future applications, such as UAV, large civil aircraft, helicopter and land or sea, or any middle low precision g navigation system (IMU).