Optimization Design of Hydraulically Interconnected Suspension Based on Orthogonal Experiment
首发时间:2018-03-13
Abstract:In this paper, a 4-DOF roll-plane half-car model of hydraulically interconnected suspension (HIS) system is established, and the dynamic equations in frequency domain for the mechanical-hydraulic coupled system are derived. Then, the sensitivities of the vertical and roll modal responses to the hydraulic parameters are analyzed by employing the Sobol global analysis approach. The results indicate that the parameters of accumulators and damping valves have a significant effect on the vertical and roll modal vibrations. On this basis, the high sensitive hydraulic parameters are selected as optimized variables, and an optimization objective function is designed by mixing the vertical acceleration power spectral density and the roll angular acceleration power spectral density via an S-function. Thereafter the HIS system is optimized using the orthogonal optimization method. Finally, simulations at the speed of 10m/s, 20m/s and 30m/s indicate the optimized HIS system synthetically improves the vehicle ride comfort and roll stability.
keywords: Hydraulically interconnected suspension Sobol sensitivity analysis Orthogonal optimization Ride comfort Roll stability
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基于正交试验的液压互联悬架优化设计
摘要:本文建立了四自由度半车防侧倾液压互联悬架模型,推导了频域内机械与液压耦合系统的动力学方程。采用Sobel全局灵敏度方法分析了液压参数对垂直和侧倾响应的影响,得到蓄能器和阻尼阀等关键液压参数对输出的影响较大。基于灵敏度分析结果,选取了四个高灵敏度液压参数,采用正交优化的方法,运用Isight和Matlab软件,通过构造S函数设计出不同工况下的液压互联悬架的加权模态响应目标,对关键液压参数进行联合仿真优化。在速度分别为10m/s,20m/s和30m/s三种工况下进行仿真分析。仿真结果表明,优化后的液压互联悬架有利于提高汽车的舒适性和稳定性。
关键词: 液压互联悬架 Sobol灵敏度分析 正交优化 舒适性 侧倾稳定性
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基于正交试验的液压互联悬架优化设计
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