基于混沌同步的永磁同步電機(jī)控制
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本文首先介紹了永磁同步電機(jī)與混沌Lorenz系統(tǒng)在數(shù)學(xué)模型上的相似之處。永磁同步電機(jī)本身是不會呈現(xiàn)混沌特性的，但是隨著電機(jī)外部力矩的變化及q軸電壓的變化，就有可能產(chǎn)生混沌現(xiàn)象。傳統(tǒng)的PI控制器在抑制混沌上作用又不是很明顯。由此引入了非線性反饋控制，該控制器能夠使非線性的電機(jī)系統(tǒng)轉(zhuǎn)化為普通的一階系統(tǒng)，從而可以通過線性系統(tǒng)的零極點配置達(dá)到期望的響應(yīng)特性。考慮到實際系統(tǒng)的某些變量可能無法測量，在非線性反饋的基礎(chǔ)之上，引入了基于混沌降階同步的狀態(tài)觀測器，用估計值代替某些不可測量的變量，進(jìn)而構(gòu)成非線性反饋，實現(xiàn)了電機(jī)系統(tǒng)的控制。同時通過Lyapunov直接法證明了觀測器的穩(wěn)定性。仿真結(jié)果也證明了該控制器的有效性。
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