基于摆偏角模型的摆式加速度计振动性能研究

Due to the vibration interference, the pendulous reed of the pendulous accelerometer will deviate from the original balance position and generate error signal, which is the main reason for the accuracy decreasing of the pendulous accelerometer. In order to optimize the performance of pendulous accelerometer in vibration, the transfer function of the system was analyzed and the mathematical model of the pendulum deflection angle in vibration was established. Various parameters in the mathematical model were compared and simulated, and the frequency characteristics of the pendulum deflection angle changing with the parameters in vibration were analyzed, which were used as the basis of design optimization. An experiment system was designed and built, which was used to perform the pendulum deflection angle comparison test and vibration error test of two accelerometer samples with different correction network parameters. The experiment results show that when the gain of the accelerometer correction network increases from 5.20×10⁵ to 2.80×10⁵, the pendulum deflection angle of the corresponding sample decreases from 16.85" to 7.75", and the vibration error decreases from 5.2×10^-4 g to 6.5×10^-5 g. The experiment results are consistent with the theoretical model and simulation results, which can be used as a method to study the characteristics of the pendulum deflection angle and optimize the vibration error of the accelerometer.