磁流变阻尼器等效阻尼建模及其控制系统研究

发布时间：2018-03-11 18:29

本文选题：磁流变阻尼器　切入点：修正的　出处：《合肥工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：磁流变阻尼器具有结构简单、响应迅速、阻尼力连续可调、耗能低等优点，是新一代高效智能减振器，有广阔的发展前景。但是由于其具有强非线性、滞回特性，结构简单且精确的力学模型很少，从而制约了磁流变阻尼器在实际工程中的应用。本文利用曲线拟合回归分析方法简化了阻尼器力学模型，并将简化模型应用到阻尼器半主动振动控制策略中。基于某型号磁流变阻尼器力学性能试验数据，对该阻尼器的动态特性进行了分析。利用MATLAB/Simulink建立了该磁流变阻尼器的修正的Bouc_Wen力学模型，并与试验结果比较，，验证了修正的Bouc_Wen模型的精度，为后面磁流变阻尼器等效线性阻尼系数解析模型的建立提供了理论基础。基于磁流变阻尼器修正的Bouc_Wen模型获得的力学性能数据，通过曲线拟合回归分析方法分别建立了磁流变阻尼器等效线性阻尼系数与三个独立工况参数：输入电压、正弦激励振幅以及激励频率的关系，提出耦合了该三个独立参数的磁流变阻尼器等效线性阻尼系数解析模型。模型误差分析表明，该模型有较小的相对误差。对耦合了磁流变阻尼器的双层弹簧支撑板系统，设计了开关控制和模糊控制两种半主动振动控制策略。利用MATLAB/Simulink建立双层弹簧支撑板半主动振动控制系统仿真模型，并对控制效果进行了对比。仿真结果表明，与被动控制策略相比较，两种半主动振动控制策略都具有良好的减振效果，模糊控制策略要优于开关控制策略。
[Abstract]:Mr damper has the advantages of simple structure, rapid response, continuously adjustable damping force and low energy consumption. It is a new generation of high efficiency intelligent shock absorber and has a broad prospect of development. However, because of its strong nonlinearity and hysteretic characteristics, the magneto-rheological damper has the advantages of high efficiency and low energy consumption. There are few simple and accurate mechanical models, which restrict the application of Mr dampers in practical engineering. In this paper, the mechanical model of dampers is simplified by means of curve fitting regression analysis. The simplified model is applied to the semi-active vibration control strategy of dampers. Based on the experimental data of the mechanical properties of a certain type of Mr damper, the dynamic characteristics of the damper are analyzed. The modified Bouc_Wen mechanical model of the Mr damper is established by using MATLAB/Simulink, and the results are compared with the experimental results. The accuracy of the modified Bouc_Wen model is verified, which provides a theoretical basis for the establishment of the analytical model of the equivalent linear damping coefficient of the magnetorheological damper. Based on the mechanical performance data obtained from the modified Bouc_Wen model of Mr damper, the equivalent linear damping coefficient and three independent operating conditions parameters of Mr damper are established by curve fitting regression analysis method respectively: input voltage. Based on the relationship between sinusoidal excitation amplitude and excitation frequency, an analytical model of equivalent linear damping coefficient of magnetorheological dampers coupled with the three independent parameters is proposed. The model error analysis shows that the model has small relative error. Two semi-active vibration control strategies, switch control and fuzzy control, are designed for the two-layer spring supporting plate system coupled with magneto-rheological damper. The simulation model of semi-active vibration control system of double-layer spring supporting plate is established by using MATLAB/Simulink. The simulation results show that compared with the passive control strategy, the two semi-active vibration control strategies have good damping effect, and the fuzzy control strategy is better than the switching control strategy.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB535.1

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