本文選題：駕駛室懸置 + 磁流變阻尼器�。� 參考：《重慶大學(xué)》2014年碩士論文

【摘要】：磁流變阻尼器具有響應(yīng)快和耗能低等優(yōu)點(diǎn)成為了目前智能懸架領(lǐng)域的研究熱點(diǎn)。而控制策略的設(shè)計(jì)又是磁流變半主動(dòng)懸架的關(guān)鍵技術(shù)。因此本文開展了磁流變阻尼器力學(xué)性能試驗(yàn)，并在試驗(yàn)數(shù)據(jù)基礎(chǔ)上建立其正逆模型。利用數(shù)值分析法建立商用車駕駛室磁流變半主動(dòng)懸置的動(dòng)力學(xué)方程，分析其動(dòng)力學(xué)特性，研究阻尼和剛度系數(shù)的不同對(duì)懸置系統(tǒng)傳遞特性造成的影響。并利用PID控制策略、模糊控制策略、仿人智能控制策略對(duì)駕駛室懸置系統(tǒng)進(jìn)行仿真控制研究。主要工作有： (1)介紹駕駛室動(dòng)力學(xué)模型和磁流變阻尼器及其控制方法的研究進(jìn)展，提出目前磁流變半主動(dòng)懸架存在的問題，并總結(jié)概括本文將要開展的主要工作。 (2)介紹磁流變阻尼器的工作模式，分別在流動(dòng)和剪切兩種工作模式下對(duì)阻尼力進(jìn)行了推導(dǎo)，得出了在混合模式下總阻尼力公式。選取阻尼器的結(jié)構(gòu)類型、參數(shù)。對(duì)磁流變阻尼器進(jìn)行工作特性測(cè)試，并分析阻尼器的示功曲線和速度曲線。基于BP神經(jīng)網(wǎng)絡(luò)對(duì)磁流變阻尼器進(jìn)行正向建模，描述磁流變阻尼器的力與位移、速度以及電流之間關(guān)系，同時(shí)建立了更有實(shí)用價(jià)值的逆模型，并用測(cè)試得到的數(shù)據(jù)對(duì)模型進(jìn)行了驗(yàn)證。 (3)闡述駕駛室隔振系統(tǒng)的評(píng)價(jià)指標(biāo)，建立隨機(jī)路面的不平度輸入模型和三自由度1/4駕駛室隔振動(dòng)力學(xué)模型。在Simulink中分析懸置參數(shù)(阻尼系數(shù)和彈簧剛度)的變化對(duì)駕駛室懸置傳遞特性的影響。 (4)介紹常用的隔振評(píng)價(jià)方法。分別闡述了PID控制策略、Fuzzy控制策略、HSIC控制策略的基本原理和方法，建立各自的控制器仿真模型，并基于Matlab/Simulink及相應(yīng)的工具箱搭建駕駛室懸置的控制仿真系統(tǒng)，然后在脈沖激勵(lì)以及隨機(jī)路面激勵(lì)的作用下分別對(duì)比不同控制(PID控制、Fuzzy控制、HSIC控制)和未加控制的控制效果，最后根據(jù)駕駛室垂直振動(dòng)加速度和駕駛室位移兩個(gè)參數(shù)的對(duì)比結(jié)果對(duì)這三種控制策略進(jìn)行了比較和評(píng)價(jià)。 最后，對(duì)全文進(jìn)行了總結(jié)，指出了本文所存在的不足以及需要更加深入研究的問題。
[Abstract]:The magnetorheological damper has the advantages of fast response and low energy consumption. The design of the control strategy is the key technology of the magnetorheological semi-active suspension. Therefore, the mechanical performance test of the magnetorheological damper is carried out in this paper, and the positive and inverse model is set up on the basis of the test data. The dynamic equation of the magnetorheological semi-active suspension of commercial vehicle cab is established, and its dynamic characteristics are analyzed. The influence of the difference of damping and stiffness coefficient on the transmission characteristics of the suspension system is studied. The simulation control of the cab suspension system is studied by using the PID control strategy, the fuzzy control strategy and the human imitation intelligent control strategy. The work is as follows:
(1) the research progress of the dynamic model of the cab and the magnetorheological damper and its control methods are introduced. The existing problems of the magnetorheological semi-active suspension are put forward, and the main work to be carried out in this paper is summarized and summarized.
(2) the working mode of magnetorheological damper is introduced, and the damping force is deduced under the two working modes of flow and shear respectively. The formula of the total damping force under the mixed mode is obtained. The structure type and parameters of the damper are selected. The working characteristics of the magnetorheological damper are tested, and the indicator curve and the velocity curve of the damper are analyzed. The BP neural network is used to forward the forward modeling of the magnetorheological damper, describing the relationship between the force and displacement, the velocity and the current of the magnetorheological damper. At the same time, a more practical inverse model is set up, and the model is verified by the data obtained by the test.
(3) the evaluation indexes of the vibration isolation system of the cab are described, the unevenness input model of the random pavement and the three degree of freedom 1/4 cab vibration isolation dynamic model are established. In the Simulink, the influence of the changes of the suspension parameters (damping coefficient and spring stiffness) on the transmission characteristics of the cab suspension is analyzed.
(4) the common vibration isolation evaluation methods are introduced. The basic principles and methods of PID control strategy, Fuzzy control strategy, HSIC control strategy are expounded respectively, and each controller simulation model is set up. Based on Matlab/Simulink and the corresponding toolbox, the control imitation system of the cab suspension is built, and then the impulse excitation and the random pavement excitation are also set up. The effects of different control (PID control, Fuzzy control, HSIC control) and uncontrolled control are compared respectively. Finally, the three control strategies are compared and evaluated according to the comparison results of two parameters of the vertical vibration acceleration of the cab and the cab displacement.
Finally, we summarize the full text, and point out the shortcomings of this paper and the problems that need further study.

【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U463.8;TB535.1

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