本文關(guān)鍵詞：基于ADAMS的汽車多連桿獨(dú)立懸架的參數(shù)優(yōu)化及仿真　出處：《長春工業(yè)大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 多體動(dòng)力學(xué) PSO-GA 多目標(biāo)優(yōu)化 操穩(wěn)性能

【摘要】：懸架參數(shù)是汽車操縱穩(wěn)定性和平順性的重要參數(shù),其好與壞直接關(guān)系到車輛與行車人員在駕駛過程中的安全性。隨著人們對車輛在駕駛過程中安全性能的要求提高,以及車企行業(yè)的不斷壯大與發(fā)展,操穩(wěn)性能獲得了越來越多的關(guān)注。另一方面,由于計(jì)算機(jī)技術(shù)的不斷進(jìn)步,使學(xué)者們在車輛研發(fā)與測試過程中,擁有了一些優(yōu)秀的虛擬樣機(jī)技術(shù)手段,極大程度的縮減了研發(fā)成本與生產(chǎn)周期,本文就是以多體動(dòng)力學(xué)原理為基礎(chǔ),借助虛擬樣機(jī)技術(shù)對某車多連桿懸架進(jìn)行仿真及優(yōu)化分析,并取得了一些成果。具體如下:首先,在查閱了大量的國內(nèi)外參考文獻(xiàn)的基礎(chǔ)上,描述了汽車懸架及其操穩(wěn)性能在國內(nèi)外中的發(fā)展歷程,以及多體系統(tǒng)動(dòng)力學(xué)原理在懸架性能分析中的理論。研究了多體系統(tǒng)動(dòng)力學(xué)理論與ADAMS應(yīng)用的相關(guān)技術(shù)。其次,以某多連桿懸架車型為例,通過ADAMS的CAR與INSIGHT模塊對多連桿懸架進(jìn)行建模,分別以懸架硬點(diǎn)各坐標(biāo)位置對外傾角、前束和輪距的敏感度影響進(jìn)行靈敏度分析,篩選出對懸架前束、外傾角、輪距影響較大的硬點(diǎn),簡化后續(xù)的優(yōu)化的步驟、縮短了優(yōu)化時(shí)間,提高了優(yōu)化效率。再次,在詳細(xì)地分析了粒子群優(yōu)化算法(PSO)和遺傳算法(GA)的基礎(chǔ)上,重點(diǎn)開展了PSO-GA進(jìn)化優(yōu)化算法的研究,并將MATLAB與PSO-GA優(yōu)化算法應(yīng)用到多連桿懸架的優(yōu)化過程中。通過對多連桿懸架硬點(diǎn)參數(shù)的修改,改善了懸架的性能。通過對兩個(gè)懸架進(jìn)行同向輪跳仿真實(shí)驗(yàn)的對比分析,發(fā)現(xiàn)優(yōu)化后的多連桿懸架的KC性能得到了明顯的改善。最后,對優(yōu)化后的懸架進(jìn)行整車操作穩(wěn)定性的仿真分析。依照國家相關(guān)標(biāo)準(zhǔn),從穩(wěn)態(tài)回轉(zhuǎn)、轉(zhuǎn)向回正、轉(zhuǎn)向輕便性、轉(zhuǎn)向瞬態(tài)響應(yīng)和蛇形等五個(gè)方面進(jìn)行綜合評價(jià)。依次對優(yōu)化前與優(yōu)化后的模型進(jìn)行上述五個(gè)實(shí)驗(yàn)仿真,把所得結(jié)果進(jìn)行對比分析,充分證明了優(yōu)化后的懸架對整車的操作穩(wěn)定性能也起到了一定的提升。
[Abstract]:The suspension parameters of vehicle handling stability and ride is the important parameters, the good and bad is directly related to the safety of vehicles and traffic officers in the driving process. With increasing demands on the safety performance of vehicles during driving and car prices increase, the industry has grown with the development of control and stability has gained more and more attention. On the other hand, due to the continuous development of computer technology, the scholars in the vehicle development and testing process, has some excellent virtual prototype technology, greatly reduced the cost of R & D and production cycle, this paper is based on the multi body dynamics principle as the foundation, with the help of simulation and optimization analysis of multi link a vehicle suspension virtual prototype technology, and achieved some results. The details are as follows: first, based on consulting a large number of references at home and abroad, describes the automobile suspension and steering In the course of development at home and abroad in the performance, and the theory of multibody system dynamics principle in suspension performance analysis. The related technology research of multi body system dynamics theory and application of ADAMS. Secondly, a multi link suspension vehicle as an example, the modeling of multi link suspension through the CAR and INSIGHT module ADAMS, respectively the suspension hard points coordinates external angle, sensitivity analysis of sensitivity of the toe and tread, to screen the suspension before the beam camber, track effect of hard spot larger, simplify the subsequent optimization steps, shorten the optimization time, improve the efficiency of optimization. Thirdly, analyzed in detail the particle swarm optimization algorithm (PSO) and genetic algorithm (GA) based on the key research on evolutionary optimization algorithm PSO-GA, and the MATLAB and PSO-GA optimization algorithm is applied to optimize the process of multi link suspension. Based on multi link suspension Frame hard point parameters change, improve the suspension performance. Through comparative analysis of the two suspension with wheel simulation, found that the performance of KC multi link suspension after optimization has been greatly improved. Finally, the vehicle operation stability of the optimized suspension simulation analysis. In accordance with the relevant state the standard, from the steady turning, turning, steering, steering for comprehensive evaluation of five aspects of transient response and serpentine. Turn on the optimized model and the five simulation experiments before optimization, the results of the comparative analysis, fully proved that the operation stability of the optimized suspension of the vehicle to play a certain improvement.

【學(xué)位授予單位】：長春工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：U463.33

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本文編號：1436968