将系统辨识引入伺服系统的测试中,采用多新息随机梯算法辨识出系统的传递函数。通过由辨识得到的传递函数来计算系统的阶跃响应特性和频率特性,既减少了测试项目,又提高了效率。基于舵机系统的测试需求完成了测试实验,与传统测试方法相比幅频特性误差小于0. 39 dB,相频特性误差小于4. 9°,上升时间的误差控制在6. 29％以下,实验结果表明,通过系统辨识来计算伺服系统性能指标取得了良好的测试效果。

System identification is introduced into servo system testing and MISG is used to calculate the transfer function of the system. Step response characteristic and frequency response of the system are calculated through the transfer function which are obtained by system identification, which not only decreases testing items but also improves testing efficiency. A test experiment was completed on the test requirement for an actuator. Compared with the traditional testing method, the experimental results show that the error of amplitude-frequency characteristic kept within 0. 39 dB and the error of phase-frequency characteristic kept within 4. 9°and the rising time was kept within 6. 29％ . Test effect is given excellent results through performance indexes of servo system obtained by system identification.

TP206