基于压力相移辅助的超流体陀螺

Superfluid gyroscope aided by pressure phase shift

超流体陀螺是新一代惯性传感器,面临的关键问题是:在幅值锁定控制系统中,热相移的注入存在较大延时,引起其动态测量性能急剧下降。为此,在研究了超流体压力相移产生原理的基础上,提出采用静电力产生压力差的方法,并根据超流体的理论,构建了压力相移的数学模型。为解算角速度,提出了基于压力相移辅助的算法,锁定了超流体相移。仿真结果表明,基于该方法,超流体陀螺测量角加速度变化的信号时,测量误差减小了约一个数量级。因此,超流体陀螺的动态性能得到了很大改善,测量精度有了显著提高。

The superfluid gyroscope, as a matter-wave interferometric gyroscope, faces the problem that the injecting of the thermal phase shift has large latency when aided by amplitude locking, which can rapidly degrade the dynamic performance of the superfluid gyroscope.To solve this problem, a pressure phase shift method is presented for the gyroscope, which uses electrostatic force to produce the pressure difference.The mathematic model of pressure phase shift is established based on the superfluid theory.In order to calculate the angular velocity, an algorithm aided by pressure phase shift is presented to lock the superfluid phase shift.Simulation results indicate that, by using the proposed method to measure the signals with varied angular acceleration, the measurement error is decreased by nearly one order of magnitude, and the dynamic performance and detection accuracy of the superfluid gyroscope are significantly improved.