| With the rapid development and wide application of servo control system, the rapid andreliable test of its performance becomes more and more important in the fields ofdigitalization, information, intellectualization, industrial automation and so on．Performance indexes of servo control system including static characteristic, stepresponse characteristic and frequency response and their testing methods were studied andanalyzed in the dissertation. Low frequency sine wave signal was used as excitation signal inthe measuring of static characteristic in order to improve test precision. Multitone Signal wasused as excitation signal in order to reduce the testing time. System identification wasintroduced into servo control system testing. Step response characteristic and frequencyresponse of the system was calculated through the transfer function of which the parameterswere obtained by system identification, which not only decreases test items and improvestesting efficiency, but also enriches the testing methods of servo control system. Experimentalsimulations were conducted by using second-order and third-order output error model withdifferent test data length, noise intensity, and the simulation results were analyzed.A test experiment and the development of host computer testing software was completedon the test requirement for an actuator. Performance indexes of the actuator were measuredincluding static characteristic, step response characteristic, frequency response and systemidentification. The frequency response measurement results were compared with those gottenby identified model. The experimental results show that the effect of calculating performanceindexes of servo control system by system identification is feasible. |
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