振动条件下陀螺加速度计误差抑制技术  

Research on Error Suppression Technology of PIGA under Vibration Condition

作　　者：于沛[1] 闫禄[1] 张金云[1] 李晶 YU Pei;YAN Lu;ZHANG Jinyun;LI Jing(Beijing Aerospace Control Instrument Research Institute, Beijing 100039, China;School of Information Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China)

机构地区：[1]北京航天控制仪器研究所,北京100039 [2]北京石油化工学院信息工程学院,北京102617

出　　处：《噪声与振动控制》2019年第2期37-41,共5页Noise and Vibration Control

摘　　要：为了减小振动条件下惯性平台陀螺加速度计的振动误差,提出一种基于陀螺加速度计进动时间数据的整周小波去噪测试方法。该方法在静态和线振动状态下分别测量平台系统中陀螺加速度计进动整周期的相关时间数据,基于改进小波方法进行去噪后,得到静态和线振动状态下的时间序列,经计算得到陀螺加速度计的振动误差。该方法能抑制陀螺加速度计输出平均角速率误差,提高陀螺加速度计随平台系统在线振动台上的测量精度。最后采用实测数据验证算法的有效性,辨识精度达到10^(-7),该方法提高陀螺加速度计随平台系统在线振动台上的振动精度。In order to reduce the vibration error of PIGA (pendulous integrating gyro accelerometer) of inertial platform under vibration conditions, a measurement method for noise reduction based on the PIGA precession during integer periods is proposed. The method is used to measure the relative time data of the precession of the PIGA in the inertial platform system under both static state and vibration state. Based on the improved wavelet method, the time series of static state and vibration state are obtained, and then the vibration error of the gyroscope accelerometer is calculated. By this testing method, the precession angular rate error of the PIGA is suppressed, and the accuracy of the test under vibration state is improved. Finally, the validity of the algorithm is verified by the measured data, and the accuracy of the identification can reach 10-7. The vibration accuracy of the PIGA in the inertial platform system under vibration state is improved.

关 键 词：振动与波 陀螺加速度计 振动误差 小波去噪 实验 

分 类 号：V249.322[航空宇航科学与技术—飞行器设计]