采用超声电机的旋转式惯导系统转台

Rotary inertial navigation system turntable based on ultrasonic motor

目前国内外针对旋转式导航系统的研究表明,调制转台的性能直接影响到系统的导航精度。提出利用新型超声电机位移分辨率高、响应快、电磁兼容性好等特点,研制了高精度、低成本的超声电机调制转台,并实现了转台的非线性控制,从而增强导航系统旋转调制效果,进一步提高导航精度。相比于体积和功耗较大的常规电磁驱动旋转平台,该超声电机转台控制精度优于40'',响应时间优于5ms,体积小,且无磁影响,有利于实现低成本、低精度的MEMS旋转式导航系统的高精度应用,并进一步推动低成本微小卫星的应用和发展。

As the domestic and oversea research on rotary navigation system illustrated, the performances of the modulated turntable can directly influence the system＇s navigation precision. To solve this problem, a high-precision and low-cost ultrasonic motor modulated turntable is developed and the nonlinear control of the turntable was realized, based on the characteristics of a new ultrasonic motor, such as high displacement resolution, fast response, and good electromagnetic compatibility, etc. Thus, the rotating modulation effect is enhanced, and the navigation accuracy is further improved. Compared to the larger volume and power consumption of conventional electromagnetic driving rotating platform, the control precision of the ultrasonic motor turntable is better than 40＇＇, the response time is less than 5 ms, the volume is smaller, and there is no magnetic influence, which is conducive to realizing high-precision application with low-cost and low-precision MEMS rotary navigation system, and further promoting the application and development of low-cost micro-satellite.