能抑制零位颤震的高精度滑模控制交流伺服系统

High-grade Slide-mold-controlled Servosystem Capable of Restraining Zero Buffeting

滑模变结构控制具有对参数变化的鲁棒性以及对外扰的不敏感性等突出优点。然而,由于在实际系统中不存在理想开关,便产生了颤震问题,当零位颤震的幅值过大时,这种控制策略将失去工程实用价值。本文讨论了滑模控制交流伺服系统中的零位颤震问题,着重分析了外扰对零位颤震的影响,提出一个能抑制零位颤震的新的控制方法。

Slide-mold Variable-structure control has robustness to parameter variations and insensitivity to external interference. Buffctings happen, however, as there is no ideal switch in actual system. The control strategy will lose practical engineering value when amplitude value of zero buffeting is too high. This paper discusses the zero buffeting in slidemold-controlled AC scrvosystem, anaiyses influence of external interference on zero buffeting and presents a new control method capable of restraining zero buffeting,