传感器非线性传递函数的频域估计

在频域研究腕力传感器的动态非线性特性,分析动态非线性产生的原因,研究时域和频域的判定方法.估计传感器线性和二次非线性传递函数,研究非高斯信号输入时二次传递函数的求解方法,探讨动态非线性主要作用频带的判定方法.分别对构造系统仿真和对实验数据分析,结果表明,非线性分析方法更为准确地描述了传感器的动态特性.

An Estimation of Nonlinear Transfer Function for WristForce Sensor in Frequency Domain

This paper investigates the dynam ic nonlinear characteristic of w rist force sensorin thefrequency dom ain. Thereasonsfordynam icnonlinearity areanalyzed, and the determ ining m ethods oftim e and frequency dom ain are studied. The sensor'strans- ferfunctionsoflinearand nonlinearare estim ated. When inputisnon-Gaussian signal, the solution of quadratic nonlinear transfer function is presented. The determ ining m ethod ofm ain nonlinearfrequency rangeisdiscussed. Theconstructed system issim u- lated, and the experim entaldata are analyzed. The results indicate that the nonlinear analyzing m ethod can describe the sensor's dynam iccharacteristicm ore accurately.