本文選題：永磁直線同步電機(jī) + 直接推力控制�。� 參考：《沈陽工業(yè)大學(xué)》2017年碩士論文

【摘要】：直接推力控制(DTC)由于其控制結(jié)構(gòu)簡單,動態(tài)響應(yīng)快,對電機(jī)參數(shù)依賴較少等優(yōu)點(diǎn)而成為直線電機(jī)伺服領(lǐng)域的研究熱點(diǎn)。針對傳統(tǒng)直接推力控制存在推力脈動大,且系統(tǒng)抗擾性差等問題,本文設(shè)計(jì)了基于擴(kuò)展?fàn)顟B(tài)觀測器的直接推力積分反步控制系統(tǒng),并結(jié)合空間電壓矢量脈寬調(diào)制技術(shù)來優(yōu)化系統(tǒng)設(shè)計(jì)。無速度傳感器技術(shù)可以降低設(shè)備成本,并提高系統(tǒng)可靠性,因此將兩者結(jié)合的無速度傳感器直接推力控制成為未來直線伺服領(lǐng)域的發(fā)展方向之一。本文以永磁直線同步電機(jī)為控制對象,研究內(nèi)容如下:首先,分析了永磁直線同步電機(jī)工作原理和數(shù)學(xué)模型,在此基礎(chǔ)上詳細(xì)分析了傳統(tǒng)直接推力系統(tǒng)的各部分構(gòu)成和基本原理,最后根據(jù)其系統(tǒng)框圖建立仿真分析了傳統(tǒng)直接推力控制存在的問題。其次,采用積分反步控制法,將系統(tǒng)分為兩個(gè)子系統(tǒng),分別設(shè)計(jì)速度調(diào)節(jié)器,推力和磁鏈調(diào)節(jié)器,推導(dǎo)出合適的實(shí)際控制律,并結(jié)合空間電壓矢量脈寬調(diào)制技術(shù)(SVPWM),獲得恒定的開關(guān)頻率。同時(shí)為增強(qiáng)系統(tǒng)抗干擾性,采用擴(kuò)張狀態(tài)觀測器(ESO)估計(jì)負(fù)載擾動并進(jìn)行前饋補(bǔ)償。建立基于ESO的直接推力積分反步控制的仿真模型,并對仿真結(jié)果與傳統(tǒng)直接推力控制進(jìn)行了對比分析。最后,在分析傳統(tǒng)滑模速度觀測器基礎(chǔ)上,針對傳統(tǒng)觀測器抖動大的問題,從滑模觀測器的切換函數(shù)、滑模開關(guān)增益和反電動勢濾波處理三個(gè)方面進(jìn)行改進(jìn)。將改進(jìn)的滑模觀測器與基于ESO的直接推力積分反步控制結(jié)合,實(shí)現(xiàn)無速度傳感器控制。進(jìn)而對整個(gè)系統(tǒng)進(jìn)行仿真,驗(yàn)證控制策略的可行性。
[Abstract]:Direct thrust control (DTC) has become a research hotspot in the field of linear motor servo due to its advantages of simple control structure, fast dynamic response and less dependence on motor parameters.Aiming at the problems of high thrust pulsation and poor disturbance rejection in traditional direct thrust control, a direct thrust integral backstepping control system based on extended state observer is designed in this paper.And the space voltage vector pulse width modulation technology is used to optimize the system design.Speed sensorless technology can reduce the cost of equipment and improve the reliability of the system, so the speed sensorless direct thrust control which combines the two technologies has become one of the development directions in the future linear servo field.This paper takes the permanent magnet linear synchronous motor as the control object. The research contents are as follows: firstly, the working principle and mathematical model of the permanent magnet linear synchronous motor are analyzed.On this basis, the composition and basic principle of the traditional direct thrust system are analyzed in detail. Finally, the problems existing in the traditional direct thrust control are analyzed by simulation according to the block diagram of the system.Secondly, the system is divided into two subsystems by using the integral backstepping control method. The speed regulator, thrust regulator and flux chain regulator are designed respectively, and the appropriate practical control law is deduced.The space voltage vector pulse width modulation (SVPWM) technique is used to obtain a constant switching frequency.The extended state observer (ESO) is used to estimate the load disturbance and to compensate for the disturbance.The simulation model of direct thrust integration backstepping control based on ESO is established, and the simulation results are compared with the traditional direct thrust control.Finally, based on the analysis of the traditional sliding mode velocity observer, aiming at the problem of large jitter of the traditional observer, the switching function of the sliding mode observer, the sliding mode switching gain and the filter processing of the backEMF are improved.The improved sliding mode observer is combined with the direct thrust integration backstepping control based on ESO to realize the speed sensorless control.Then the whole system is simulated to verify the feasibility of the control strategy.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM341

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