【摘要】 本文应用系统辨识与参数估计理论对双环直流脉宽调速系统的速度环进行了现场辨识试验。文章详细讨论了试验信号选择、辨识算法以及数据处理等问题。结果表明在不同工况或电源电压变化时,系统具有不同的动态特性。文中还对电路进行了定性分析,证明两者结论相符。最后,由辨识结果给出了系统在各种不同情况下的传递函数G(z)和G(s)。更多还原

【Abstract】 In this paper, an on-line identification test for a doubly-loop DC PWM speed control system using system indentification and parameter estimation theory is introduced and described. The paper discusses the identification technique problem such as test signal,identification algorithm and data processing etc.in detail. The test result. shows that the PWM system has different dynamic characteristics under the different operating mode or different power supply. The paper also shows that the generally analysis for the PWMsystem circuit and it’s indentilication test have the same result. At last, the paper gives the transfer function G(z) and G(s) in different cases from the indentiiication test result.更多还原