電力系統(tǒng)自動(dòng)化會(huì)議-在線瀏覽
2024-08-07 16:04本頁面
【正文】 電機(jī)(PMSM)位置伺服系統(tǒng)可提高系統(tǒng)的魯棒性和動(dòng)態(tài)特性。PMSM位置伺服系統(tǒng)采用傳統(tǒng)滑?？刂品椒〞r(shí)，需要設(shè)計(jì)多個(gè)滑模面，并通過滑模面間的切換實(shí)現(xiàn)位置和速度控制，然而滑模面的切換易引發(fā)系統(tǒng)的抖振，且控制量設(shè)計(jì)復(fù)雜。趨近律滑模的引入有效地抑制了傳統(tǒng)滑?？刂浦写嬖诘亩墩瘳F(xiàn)象，提高了跟蹤精度。關(guān)鍵詞：永磁同步電機(jī)；滑模控制；位置控制；趨近律；削弱抖振；中圖分類號(hào)：TM351PMSM Servo System Based on Reaching law Sliding Mode ControlHaibo Wang, Wei Tian(State Grid Electric Power Research Institute, Nanjing 210003)Abstract: Sliding mode control (SMC) is adopted in permanent magnet synchronous motor (PMSM) servo system to improve system robustness and characteristics. Conventional SMC method in PMSM servo systems requires several slide surfaces, while position servo and velocity control is realized by switches of these slide surfaces, which causes system chattering. In addition, design of control law is also plex. It is in this problem that a PMSM servo system based on reaching law SMC is proposed in this paper. It guarantees SMC in both position and velocity regulation and realizes accurate position servo and velocity control. Stability of the system is proved by Lyapunov Function. The reaching law method also reduces system chattering and improves the accuracy of position servo. Both simulation and experimental results demonstrate that the proposed method is correct and the designed control strategy is effective. Keyword: permanent magnet synchronous motor。 position control。 reduces chattering。隨著現(xiàn)代電力電子和計(jì)算機(jī)技術(shù)的快速發(fā)展，PMSM構(gòu)成的交流伺服系統(tǒng)正逐步取代直流伺服系統(tǒng)，并在高精度數(shù)控、機(jī)器人等眾多領(lǐng)域得到日益廣泛的應(yīng)用[13]。但是常規(guī)PID控制器運(yùn)用于具有很強(qiáng)非線性特性的PMSM伺服系統(tǒng)時(shí)，系統(tǒng)性能易受參數(shù)變化及外部擾動(dòng)的影響，只能在有限的工作范圍內(nèi)滿足系統(tǒng)特性要求?；Ｗ兘Y(jié)構(gòu)控制(SMC)是一種有效的非線性魯棒控制方法，它具有對(duì)系統(tǒng)的參數(shù)攝動(dòng)和外干擾魯棒性強(qiáng)、結(jié)構(gòu)簡(jiǎn)單及響應(yīng)快速等優(yōu)點(diǎn)。基于滑模控制的伺服系統(tǒng)的研究主要集中在各種滑模面及控制律的設(shè)計(jì)優(yōu)化、物理實(shí)現(xiàn)及系統(tǒng)抖振的抑制等方面。文獻(xiàn)[9]設(shè)計(jì)了一種全滑?？刂频腜MSM伺服系統(tǒng)，并運(yùn)用遞歸模糊神經(jīng)網(wǎng)絡(luò) (RFNN) 控制方法對(duì)系統(tǒng)中一些不確定因素進(jìn)行觀測(cè)補(bǔ)償，削弱了傳統(tǒng)滑?？刂葡露墩駟栴}。文獻(xiàn)[10]、[11]針對(duì)位置伺服系統(tǒng)采用傳統(tǒng)滑?？刂茣r(shí)速度不可控的問題
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