CHZ型重力仪重力测量伺服回路的分频段控制方案

Frequency-piecewise Control Scheme for the Gravity Measurement Servo Loop of the CHZ Gravimeter

针对原有CHZ型海洋重力仪重力测量伺服回路PI控制模型的不足,提出对强扰动频段(海浪频率)用一个独立反馈回路进行抑制衰减的方案,并进行了理论分析和建模仿真,表明该方案可将海浪对采样质量的扰动幅度降低50%以上,并提高重力测量带宽一个量级,因此可改善重力仪在恶劣海况下的工作性能,改善测量中的非线性效应。

To aim at improving the existing PI control scheme of the CHZ sea gravimeter,a frequency-piecewise control scheme is proposed for the gravity measurement servo loop,an independent servo loop is used to specially suppress the displacement amplitude of the sampling mass suffering from the strong ocean wave disturbance.The scheme is theoretically analyzed and simulated,which shows that it can further suppress the amplitude of the sampling mass more than one time,and widen the control bandwidth by one order,so that it’s helpful in improving the performance while working in severe sea condition.