共查询到18条相似文献，搜索用时 156 毫秒
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分析了电动机的转动惯量、转矩传感器刚度、减速机构减速比对汽车操纵稳定性的影响,采用汽车操纵稳定性评价指标确定目标函数,利用遗传算法对电动助力转向系统结构参数进行了优化,并对参数优化前后系统性能进行仿真对比. 相似文献
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运用汽车操纵稳定性能理论分析了横向稳定杆对于汽车稳态响应性能的影响.利用ADAMS/Car仿真软件建立了整车模型,通过改变悬架弹簧刚度实现横向稳定杆的动力学等效,并进行了常半径转向的操作稳定性仿真试验.试验结果表明,通过安装横向稳定杆可以改善汽车的稳态响应,提高汽车的操作稳定性能. 相似文献
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利用多体动力学仿真软件ADAMS建立了车辆的模型,并对汽车进行了稳态回转试验和双移线试验的设计和仿真分析.依据仿真结果,对汽车的操纵稳定性做出了评价.结果表明,利用ADAMS软件可以对汽车的操纵稳定性进行精确的仿真试验,进而达到优化产品设计方案的目的. 相似文献
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建立了四连杆式悬架多刚体系统模型，并对车轮定位参数等特性进行了仿真，运用多目标函数的最优化方法对悬架的结构参数进行了优化，将优化前后的车轮定位参数运动学特性进行了对比，结果表明，悬架结构参数的优化对提高悬架性能具有重要作用。 相似文献
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对有限频段内汽车悬架系统的时滞反馈控制参数优化问题进行研究。首先,建立时滞加速度反馈控制下 1/4 汽车悬架系统力学模型,推导出车身和车轮加速度幅值的解析表达式;其次,通过对系统稳定性分析,得到关于反馈增益系数和时滞的稳定性分区图,以数值计算验证稳定性分析的正确性;最后,在有限频段内以最大车身加速度变化的百分比为优化目标,以反馈增益系数和时滞为优化参数,利用粒子群优化算法获得有限频段内最优反馈增益系数和时滞。实验结果表明,与被动汽车悬架系统相比较,最优时滞反馈控制下汽车悬架系统的隔振性能获得了明显提高,在最优时滞反馈控制参数取值下,有限频段内车身加速度幅值至少降低37.27%。 相似文献
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基于系统动力学理论建立了含被动悬架的汽车半车动力学模型。在MATLAB／Simulink中,集成以白噪声一积分器产生的地面输入,及前、后悬架非簧栽质量模型和车体运动模型,最终实现被动悬架特性仿真的软件编程,为悬架参数的设计和优化提供了技术基础。 相似文献
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To improve the suspension performance and steering stability of light vehicles, we built a kinematic simulation model of a whole independent double-wishbone suspension system by using ADAMS software, created random excitations of the test platforms of respectively the left and the right wheels according to actual running conditions of a vehicle, and explored the changing patterns of the kinematic characteristic parameters in the process of suspension motion. The irrationality of the suspension guiding mechanism design was pointed out through simulation and analysis, and the existent problems of the guiding mechanism were optimized and calculated. The results show that all the front-wheel alignment parameters, including the camber, the toe, the caster and the inclination, only slightly change within corresponding allowable ranges in design before and after optimization. The optimization reduces the variation of the wheel-center distance from 47.01 mm to a change of 8.28 mm within the allowable range of -10 mm to 10 mm, promising an improvement of the vehicle steering stability. The optimization also confines the front-wheel sideways slippage to a much smaller change of 2.23 mm; this helps to greatly reduce the wear of tires and assure the straight running stability of the vehicle. 相似文献
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褚志刚 《重庆大学学报(英文版)》2003,2(2)
1. Introduction In order to improve the driving operation performance, the front suspension of a vehicle is generally of McPherson independent style, which can simplify the structure, lighten the unsprung mass, and conveniently arrange the engine and steering system. Moreover, it can adapt to many types of springs and is of advantage to adjust the height of the vehicle. In such a system, the axis of the kingpin is the line between the upper damper end and the intersection of the transverse ar… 相似文献
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In this paper, the performance of a column-type electric power steering (EPS) system and vehicle has been studied and a detailed mathematical model for the system has been established. Based on the mathematic model of the optimization design for steering feel, the parameters of the EPS system and vehicle on steering performance have been investigated.Moreover, the effects of the parameters on system stability have been analyzed and compared by the method of absolute sensitivity and the results are given in the end. 相似文献
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On the basis of analyzing the system constitution of vehicle semi-active suspension,a 4-DOF(degree of freedom)dynamic model is established.A tunable fuzzy logic controller is designed by using without quantification method and taking into account the uncertainty,nonlinearity and complexity of parameters for a vehicle suspension system.Simulation to test the performance of this controller is performed under random excitations and definite disturbances of a C grade road,and the effects of time delay and changes of system parameters on the vehicle suspension system are researched.The numerical simulation shows that the performance of the designed tunable fuzzy logic controller is effective,stable and reliable. 相似文献
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This paper presents the development of a proportional-integral-derivative (PID)-based control method for application to active vehicle suspension systems (AVSS). This method uses an inner PID hydraulic actuator force control loop, in combination with an outer PID suspension travel control loop, to control a nonlinear half-car AVSS. Robustness to model uncertainty in the form of variation in suspension damping is tested, comparing performance of the AVSS with a passive vehicle suspension system (PVSS), with similar model parameters. Spectral analysis of suspension system model output data, obtained by performing a road input disturbance frequency sweep, provides frequency response plots for both nonlinear vehicle suspension systems and time domain vehicle responses to a sinusoidal road input disturbance on a smooth road. The results show the greater robustness of the AVSS over the PVSS to parametric uncertainty in the frequency and time domains. 相似文献
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林森泉 《Journal of Zhangzhou Technical Institute》2020,(1):78-84
针对传统汽车悬置系统能量解耦率低,振动传递率高的问题,建立了悬置系统动力学分析模型。将汽车动力总成悬置系统的振动性能分析和参数测试与系统模态耦合和振动能量解耦匹配理论相结合,采用MATLAB软件编制的程序来计算系统能量分布,并在满足悬置系统设计约束的前提下对系统悬置刚度值与布置参数进行了优化。某型号汽车悬置系统优化设计与振动性能测试结果验证了优化方案的有效性和可行性。 相似文献
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根据汽车隔振基本原理,提出了悬架振动的混沌描述问题.采用汽车制动悬架隔振效率实验台获取了实验汽车前、后悬架的振动曲线,计算了系统参数如一阶固有频率和阻尼比,并计算了混沌参数如最小嵌入相空间维数和关联维,获得了汽车悬架的隔振性能、混沌参数与系统参数三者之间的对应关系.研究结果表明:对于吉普车型,可采用最小嵌入相空间维数Mmin评价前悬架隔振性能的变化,Mmin值越小,隔振性能趋差,对应于前悬架的刚度和阻尼值越小;对于不同车型,可采用关联维D2区分吉普车型或轿车型的悬架,吉普车型的D2值高于轿车型. 相似文献