Measurement analysis of the control error of servo universal testing machine under different control mode
Based on the alloy test specimen,by means of electrical universal testing machine,through designing synchronized load test,the measurement research and theoretical analysis of control accuracy of servo universal testing machine under different control mode is performed.The test result show as the follows:the control error by mode of force-controlled loading is higher than displacement-controlled;under the force control mode,the control error increases with increasing loading rate,the exponential and logarithmic relationship is indicated between accommodation time and loading rate;under the displacement control mode,the control error changing with loading rate is not obvious,the power function relationship is indicated between accommodation time and loading rate;control error of cycle programming is higher in force control mode,and it lower in force displacement control mode.Theoretical analysis shows:test machine adopt beam-type stain load sensor and different load polarity is the chief reasons lead to control error on force control mode higher than displacement control.
control modeservo universal testing machinecontrol errorsynchronized load
万方数据
维普
