Research on the Measurement System of Friction Torque for Arc Structure Servo Mechanism

In this paper, in order to realize friction torque measurement and assembly behavior analysis of arc structure servo mechanism (ASSM), a general measurement system applied, meanwhile structural characteristics and performance of the ASSM are analyzed. Based on the fundamental of electrical method, the system is built up by the principle of vertical structure in line. So the system can applied to all kinds of ASSM by replacing the U-shape frame which suits to the target servos. The experiment is carried out on a certain type, the mean value of dynamic friction torque is about 1.00Nm, and the variance of measured data is about 0.01. The results indicate that the measurement system can measure friction torque and its inhomogeneity effectively and can be used in measurement of friction torque on other ASSM.