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《Chinese Journal of Sensors and Actuators》 2012-12
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Research on Zero Compensation for MEMS Gyroscope Based on Digital Regulation

WU Feng,WANG Xiangjun*,TANG Qijian(1.State Key Laboratory of Precision Measuring Technology and Instruments,Tianjin University,Tianjin 300072,China; 2.MOEMS Education Ministry Key Laboratory,Tianjin University,Tianjin 300072,China)  
Zero output of MEMS gyroscope is significantly influenced by the ambient temperature.To solve this problem,a zero compensation circuit based on digital regulation was designed and a test method of zero-drift characteristic was presented.The output of compensation circuit was adjusted real-time according to the output of internal temperature sensor of gyroscope to realize zero compensation.Using full temperature(-40 ℃-+60 ℃)test method,a zero-drift model of gyroscope was obtained,and a math model of temperature and compensation circuit was also calculated based on the relationship between zero-drift value and output value of compensation circuit.The results showed that using this method it can improve the stable accuracy of gyroscope's zero output by one order of magnitude in the range of full temperature,and it also can prove the feasibility and validity of the compensation.
【CateGory Index】: TN966
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【Citations】
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