基于LabVIEW的音圈电机驱动小角度转台系统辨识方法

通过分析逆重复伪随机序列(L序列)的生成原理,设计了一种基于LabVIEW的L序列生成方法,将其作为音圈电机驱动的小角度转台的辨识输入信号,同时以转台上测角装置的测量值作为反馈输出信号,用最小二乘法对输入输出信号进行参数辨识,从而确定了转台的传递函数。最后,将输入信号代入传递函数与实际输出信号进行了对比,并对一系列的频率点进行了验证。结果表明,这种方法具有较高的辨识精度,对研究转台的高精度控制算法具有重要的参考价值。

Transfer function identification in a small-angle turntable actuated by voice coil motor based on LabVIEW

This paper proposed a method for the generation of L-sequence based on LabVIEW after analyzing its generating principle,used the acquired sequence as the system identification signal of the small-angle turntable actuated by VCM(Voice Coil Motor) and fed back by the angle-measurement device.The transfer function is determined by the method of Least Square and examined by inputting the original signal to the transfer function to make a contrast.The characteristic of a series of frequencies are tested.It can be found from the result that this kind of method has a rather high identification precision,which is valuable for the research in high precision control scheme of the small-angle turntable.