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  本文選題：磁流變流體減振器　切入點(diǎn)：磁路　出處：《吉林大學(xué)》2014年博士論文

【摘要】：隨著汽車的高速普及和集成技術(shù)的發(fā)展，汽車的NVH（Noise，Vibrtation，Harshness）特性要求不斷提高，這對影響車輛行駛安全性和乘坐舒適性的懸架設(shè)計(jì)提出了技術(shù)挑戰(zhàn)�；诖帕髯儨p振器的半主動懸架以其控制效果接近主動懸架，而成本、功耗、結(jié)構(gòu)復(fù)雜性、可靠性等優(yōu)于主動懸架等特點(diǎn)，逐漸成為現(xiàn)代汽車懸架系統(tǒng)的最佳解決方案。然而，基于磁流變減振器的半主動懸架系統(tǒng)存在機(jī)、電、液、磁、熱等多作用物理過程，使得其設(shè)計(jì)、分析與控制非常復(fù)雜，仍然需要深入開展理論與應(yīng)用研究。為此，本文以磁流變流體半主動減振器為對象，，開展多場耦合分析及控制研究，為車輛行駛安全及乘坐舒適性提供理論基礎(chǔ)。 本文通過對磁流變流體在兩平板間運(yùn)動工作模式的研究，導(dǎo)出了磁流變流體在多種運(yùn)動模式下的的流變學(xué)方程，結(jié)合MRD工作缸內(nèi)部的工作模式，完成了MRD阻尼力大小的計(jì)算方法。通過此方法進(jìn)行計(jì)算，結(jié)合本項(xiàng)目要求，設(shè)計(jì)了磁流變流體減振器的初始結(jié)構(gòu)、電磁線圈匝數(shù)、阻尼力范圍的選擇以及磁路等參數(shù)，利用這些參數(shù)設(shè)計(jì)出磁流變流體減振器。 利用ADINA軟件的結(jié)構(gòu)模塊，建立磁流變流體減振器的結(jié)構(gòu)力學(xué)模型和流體力學(xué)模型。通過在ADINA前處理模塊中分別對磁流變減振器的固體結(jié)構(gòu)、流體結(jié)構(gòu)和磁場結(jié)構(gòu)進(jìn)行各種邊界條件的設(shè)置，再利用ADINA流固耦合、磁固耦合計(jì)算求解器進(jìn)行求解，在ADINA后處理模塊中得到磁流變流體減振器的固體結(jié)構(gòu)動力學(xué)特性、磁流變流體減振器的流場特性、磁場分布圖、磁流變流體減振器的速度特性曲線以及磁流變流體減振器的示功特性曲線。 根據(jù)計(jì)算機(jī)仿真分析結(jié)果，提取磁流變流體減振器參數(shù)，對磁流變流體減振器進(jìn)行樣件開發(fā)。并對完成的磁流變流體減振器進(jìn)行臺架試驗(yàn)，得到磁流變流體減振器不同電流強(qiáng)度下的速度特性和示功特性。根據(jù)磁流變流體減振器的工作原理，對其在無電流和通電狀態(tài)下的速度特性以及示功特性進(jìn)行分析，并將有限元仿真結(jié)果與其進(jìn)行對比分析。 本文提出一種基于物理建模和快速控制原型相綜合的磁流變減振器半主動懸架控制系統(tǒng)設(shè)計(jì)方法。首先采用四分之一車輛懸架歸約模型，提出懸架控制算法的評價指標(biāo)；而后為實(shí)現(xiàn)控制系統(tǒng)的高效不間斷設(shè)計(jì)，提出一個融基于物理的模型、控制算法研究、仿真、軟件及硬件協(xié)同設(shè)計(jì)的研究框架，即基于AMEsim、Matlab等進(jìn)行工具鏈開發(fā)的快速控制原型，并對SH控制器、ADD控制器、SH-ADD混合控制器進(jìn)行仿真分析，并根據(jù)懸架控制算法的評價指標(biāo)對控制器進(jìn)行了綜合評價。為開展四分之一車輛懸架半主動控制測試，提出了控制系統(tǒng)軟硬件設(shè)計(jì)解決方案。根據(jù)四分之一車輛懸架半主動控制測試試驗(yàn)臺需求，完成了控制系統(tǒng)軟硬件設(shè)計(jì)。
[Abstract]:With the rapid popularization of automobile and the development of integrated technology, the requirements of NVHN NoiseVibrationHarshness (NVH) are improved, which poses a technical challenge to the suspension design, which affects the driving safety and ride comfort of the vehicle.The semi-active suspension based on magnetorheological shock absorber has become the best solution for modern automobile suspension system because its control effect is close to active suspension, but the cost, power consumption, structure complexity, reliability and so on are better than active suspension.However, the semi-active suspension system based on magnetorheological shock absorber has many physical processes, such as machine, electricity, fluid, magnetism and heat, which make its design, analysis and control very complicated.Therefore, in this paper, the magneto-rheological fluid semi-active shock absorber is taken as the object, the multi-field coupling analysis and control research are carried out, which provides the theoretical basis for vehicle driving safety and ride comfort.In this paper, the rheological equations of magnetorheological fluid (MRF) under various motion modes are derived by studying the working mode of MRF between two plates, and combined with the internal working mode of MRD working cylinder.The calculation method of MRD damping force is completed.According to the requirements of this project, the initial structure of Mr fluid absorber, the number of turns of electromagnetic coil, the selection of damping force range and the magnetic circuit parameters are designed by this method. Using these parameters, the MRF damper is designed.The structural mechanics model and hydrodynamic model of Mr fluid absorber are established by using the structure module of ADINA software.The solid structure, fluid structure and magnetic field structure of Mr shock absorber are set up in the ADINA pre-processing module, and the ADINA fluid-solid coupling and magneto-solid coupling calculation solver is used to solve the problem.In the ADINA post-processing module, the solid structure dynamics characteristics, the flow field characteristics and the magnetic field distribution of the Mr fluid absorber are obtained.The velocity characteristic curve of Mr fluid absorber and the power characteristic curve of Mr fluid damper.According to the results of computer simulation, the parameters of Mr fluid absorber are extracted, and the sample of Mr fluid absorber is developed.The velocity and power characteristics of the Mr fluid absorber with different electric current intensity are obtained by bench test.According to the working principle of Mr fluid absorber, the velocity and power characteristics of Mr fluid absorber under the condition of no current and current are analyzed, and the finite element simulation results are compared with them.This paper presents a design method for the semi-active suspension control system of Mr shock absorber based on physical modeling and rapid control prototype synthesis.The research framework of software and hardware collaborative design, that is, the rapid control prototype of tool chain development based on AMEsimo Matlab, etc., and the simulation analysis of SH-ADD hybrid controller based on SH-ADD controller are carried out.The controller is evaluated synthetically according to the evaluation index of suspension control algorithm.In order to carry out semi-active control test of 1/4 vehicle suspension, the software and hardware design solution of the control system is put forward.According to the requirement of 1/4 vehicle suspension semi-active control test bench, the hardware and software design of the control system is completed.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2014
【分類號】：TB535.1

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