新型轮毂电机悬架控制策略研究

采用轮毂电机驱动的车辆非簧载质量显著增大,并且路面激励直接作用在电机上,影响电机的电磁效应,使得振动加剧,因此提出一种新型动力吸振构型.将电机作为吸振器悬置在车轮之内,并针对此构型提出一种新的半主动悬架混合控制策略,且通过Matlab建模仿真.结果表明簧上加速度和轮胎动挠度均有所衰减,采用混合控制策略的悬架系统在平顺性方面有所提升.     

基于径向基函数响应面的履带车辆悬挂系统参数优化方法

为提高履带车辆的平顺性,对车辆悬挂系统参数的优化方法进行了研究.首先建立以驾驶椅位置联合加权加速度有效值为评价指标的履带车辆平顺性评价模型,并进行了实验验证.在此基础上,运用径向基函数法构建了悬挂系统主要参数与平顺性评价指标之间的响应面模型.利用响应面模型,选择自适应模拟退火优化算法对悬挂系统参数进行优化设计.优化后车...     

基于ADAMS的滚珠丝杠式ISD悬架平顺性仿真研究

为解决Ⅰ型ISD悬架存在的惯容器"击穿"现象,提出Ⅱ型ISD悬架,以提高ISD悬架实用性能.基于Pro/E和ADAMS联合建模,通过ADAMS和MATLAB联合仿真,对滚珠丝杠式ISD悬架平顺性进行仿真分析.对正弦输入、随机路面输入和阶跃输入作用下的ISD悬架动态性能进行初步研究.结果表明:与传统被动悬架相比,提出的Ⅱ型ISD悬架可以有效降低车身垂直振动加速度.     

车辆智能悬挂发展现状与研究思路探讨

在分析车辆各类智能悬挂系统实现方案及技术特点的基础上,提出了基于路面预瞄的电磁混合悬挂技术是未来车辆智能悬挂技术的发展方向与研究主线,而路面不平度预瞄技术-电磁混合悬挂技术-复合控制方法与高效算法是车辆智能悬挂走向实用必须克服的3个关键技术.     

基于磁流变液减振器的车辆悬挂半主动控制

磁流变液减振器,通过线圈电流改变磁场调节磁流变液在阻尼通道中的流动,实现对减振器阻尼力的控制.车辆悬挂系统由弹性元件、导向元件和减振器组成.基于磁流变液阻尼器的车辆悬挂半主动控制,采用二自由度1/4车体模型构建控制器模型.通过二次型最优控制LQR算法,根据极值原理导出最优控制律,以确定半主动减振器驱动器控制力.仿真表明,该控制器具有较好的稳定性和良好的减振效果.     

装甲车辆电液伺服主动悬挂系统随机控制及台架实验研究

本文建立了电液主动悬挂系统的数学模型,基于随机最优控制理论,设计了最优控制器.在此基础上,利用最小范数法,详细研究了主动悬挂的次优控制规律.提出了一种取舍反馈变量的新方法--灵敏度分析法,解决了次优控制在工程应用中的反馈变量选择问题.利用研究的理论和方法,立足实际的车辆悬挂参数,设计了次优控制器,并进行了数值仿真和台架实验.结果表明,提出的次优控制策略和灵敏度分析方法是可行的;设计的次优控制器和最优控制器具有相当的控制效果,在低频区能大幅度衰减车体加速度和轮胎变形,对于改善装甲车辆的平顺性和稳定性有重要作用.     

Optimization Design of McPherson Suspension Steering System Based on R-W Method

The kinematical equations of McPherson suspension and steering system were set up by using R-W method of multi-rigid body system dynamics.The incidence matrix,route matrix,hinge vector matrix and system constraint equations were educed.The optimization model of McPherson suspension steering mechanism was founded by regarding the McPherson suspension and steering system as an integrated system.In order to gain the best optimization effect,a continuous weighting function was created according to the requireme...     

Toward Forty Thousand-Cycle Aqueous Zinc-Iodine Battery: Simultaneously Inhibiting Polyiodides Shuttle and Stabilizing Zinc Anode through a Suspension Electrolyte

Aqueous zinc-iodine (Zn-I₂) batteries are promising candidates for grid-scale energy storage due to their safety and cost-effectiveness. However, the shuttle effect of polyiodides, Zn corrosion, and accumulation of by-products restrict their applications. Herein, a simple vermiculite nanosheets (VS) suspension electrolyte is designed for simultaneous confinement of polyiodides and stabilization of Zn anode. It is found that the generation of I₅⁻ as dominant intermediate and the precipitation reaction between I₅⁻ and alkaline by-products should cause irreversible iodine species loss. Benefiting from the high binding energy between polyiodides and silica-oxygen bonds of VS, dissolved polyiodides are effectively anchored on the surface of VS suspended in the bulk electrolyte to suppress the shuttle effect, which is confirmed by in situ Raman, Ultraviolet-visible characterizations and theoretical calculations. Furthermore, the self-assembly VS interfacial layer on the surface of Zn anode hinders side reactions induced by polyiodides. Meanwhile, the interlayer and surface excess negative charges of VS tend to be compensated by Zn²⁺ from diffuse layer, which serves as ion accelerators for transferring Zn²⁺ at the interface immediately, rendering dendrite-free Zn plating/stripping behavior. Consequently, the Zn-I₂ battery with VS electrolyte achieves an ultra-long lifespan of 40000 cycles with a negligible capacity decay at 20 C.