本文選題：超磁致伸縮執(zhí)行器 + 磁滯非線性��； 參考：《南京航空航天大學(xué)》2015年碩士論文

【摘要】：隨著新型功能材料的發(fā)展,出現(xiàn)了具有輸出力大、能量密度高、分辨精度高及響應(yīng)速度快等優(yōu)點(diǎn)的新型執(zhí)行器,如基于超磁致伸縮材料(Giant Magnetostrictive Material,GMM)的執(zhí)行器。然而就現(xiàn)階段而言,由于GMM內(nèi)部復(fù)雜的本征非線性與磁滯特性,使得GMM及以GMM為核心材料的執(zhí)行器在實(shí)際應(yīng)用中存在輸出位移或力滯回性強(qiáng)、非線性嚴(yán)重、定位精度不高等一些關(guān)鍵技術(shù)難題亟需解決。本文以超磁致伸縮執(zhí)行器(Giant Magnetostrictive Actuator,GMA)在電液伺服領(lǐng)域的應(yīng)用為背景,著重對(duì)GMA的磁滯非線性建模及其控制技術(shù)展開研究。本文的主要研究工作可分為以下六部分:第一章提出了課題研究背景和意義,總結(jié)了GMA磁滯模型及模型參數(shù)辨識(shí)的現(xiàn)狀及發(fā)展,介紹了GMA控制技術(shù)的國內(nèi)外研究現(xiàn)狀并簡(jiǎn)要概括了課題的研究?jī)?nèi)容和全文的組織結(jié)構(gòu);第二章介紹了GMM的應(yīng)用特性及其執(zhí)行器的結(jié)構(gòu)和工作原理,并針對(duì)GMA的試驗(yàn)結(jié)果,分析了其在不同的激勵(lì)電流、預(yù)應(yīng)力、磁感應(yīng)強(qiáng)度下執(zhí)行器輸出位移滯回曲線的變化情況。第三章建立了傳統(tǒng)的PI模型與逆模型,通過理論與仿真分析了模型應(yīng)用的局限性并基于此建立了改進(jìn)的PI模型與逆模型,但該模型在改變GMA預(yù)壓力的情況下并不能很好的預(yù)測(cè)磁滯曲線,因此又建立了基于改進(jìn)的PI模型的應(yīng)力相關(guān)磁滯非線性模型。以上模型都是GMA在準(zhǔn)靜態(tài)下所建立的,對(duì)于其在動(dòng)態(tài)條件下,又建立了一種率相關(guān)的PI動(dòng)態(tài)模型,通過實(shí)驗(yàn)驗(yàn)證了模型的正確性和可預(yù)測(cè)性。第四章建立了基于J-A磁滯模型的超磁致伸縮執(zhí)行器位移磁致非線性模型,并通過改進(jìn)的模擬退火算法和改進(jìn)的廣義粒子群算法對(duì)模型參數(shù)進(jìn)行了辨識(shí)優(yōu)化,并通過實(shí)驗(yàn)驗(yàn)證了辨識(shí)參數(shù)的準(zhǔn)確性。第五章完成對(duì)超磁致伸縮執(zhí)行器的控制系統(tǒng)的實(shí)驗(yàn)調(diào)試,調(diào)試合格基礎(chǔ)上,對(duì)系統(tǒng)進(jìn)行比例迭代控制和基于PI逆模型的前饋控制研究試驗(yàn),試驗(yàn)結(jié)果表明在輸入頻率低于60Hz下該控制算法可以有效的補(bǔ)償GMA的滯回曲線。第六章對(duì)全文的研究工作與研究成果進(jìn)行了概括。
[Abstract]:With the development of new functional materials, new actuators, such as those based on Giant Magnetostrictive material (GMMs), have been developed with the advantages of large output force, high energy density, high resolution accuracy and fast response.However, at the present stage, because of the complex intrinsic nonlinear and hysteresis characteristics of GMM, GMM and actuators with GMM as the core material have strong output displacement or force hysteresis in practical application, and the nonlinearity is serious.Some key technical problems, such as low positioning accuracy, need to be solved.In this paper, based on the application of Giant Magnetostrictive Actuator (GMA) in electro-hydraulic servo field, the nonlinear modeling and control techniques of GMA hysteresis are studied.The main research work of this paper can be divided into the following six parts: in the first chapter, the background and significance of the research are put forward, and the current situation and development of GMA hysteresis model and model parameter identification are summarized.This paper introduces the research status of GMA control technology at home and abroad, and briefly summarizes the research contents and the organization structure of the full text. Chapter 2 introduces the application characteristics of GMM, the structure and working principle of the actuator, and the experimental results of GMA.The hysteresis curves of actuator output displacement under different excitation current, prestress and magnetic induction intensity are analyzed.In the third chapter, the traditional Pi model and inverse model are established, and the limitations of the model are analyzed through theory and simulation. Based on this, the improved Pi model and inverse model are established.However, the model can not predict the hysteresis curve well when the GMA prepressure is changed, so the stress-dependent hysteresis nonlinear model based on the improved Pi model is established.The above models are all established by GMA under quasi-static condition. For these models, a rate dependent Pi dynamic model is established under dynamic conditions, and the correctness and predictability of the model are verified by experiments.In chapter 4, the displacement magnetostrictive nonlinear model of giant magnetostrictive actuator based on J-A hysteresis model is established, and the parameters of the model are identified and optimized by the improved simulated annealing algorithm and the improved generalized particle swarm optimization algorithm.The accuracy of identification parameters is verified by experiments.The fifth chapter completes the experimental debugging of the control system of the giant magnetostrictive actuator. On the basis of the qualified debugging, the proportional iterative control and the feedforward control experiment based on Pi inverse model are carried out.The experimental results show that the control algorithm can compensate the hysteresis curve of GMA effectively when the input frequency is lower than 60Hz.The sixth chapter summarizes the research work and research results.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB381;TP215

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本文編號(hào)：1763433