一种电动执行机构的力矩检测方法

A Torque Measurement Method of Electric Actuator

力矩检测是电动执行机构的重要环节,电动执行机构输出力矩和电机电流有一定的对应关系,因此,本文提出一种间接测量输出力矩的工程办法,即通过对电动执行机构输出电流有效值的测量来间接测量输出力矩。利用快速傅里叶变换计算电流有效值,并与电流检测计测量得到的电流有效值作对比,实验结果表明快速傅里叶变换计算电动执行机构的电流有效值可以作为间接测量其输出力矩的有效办法。

Torque detection is an important part of the electric actuator. There is a certain corresponding relationship between the electric actuator output torque and the motor current,and therefore,this paper puts forward an engineering method of indirectly measuring the output torque,namely indirectly measuring the output torque by measuring the effective value of the electric actuator output current. Computing the current effective value by fast Fourier transform,compared with the current effective value measured by the current detector,experimental results show that the calculation of current effective value of the electric actuator by fast Fourier transform can be used as an effective method of indirectly measuring the output torque.