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Optimization Design of Hydraulically Interconnected Suspension Based on Orthogonal Experiment
Zhou Bing 1 *,Long Lefei 2,Wu Xiaojian 2
1.State Key Laboratory of Advanced Design and Manufacturing for vehicle body, Hunan University, Changsha, Hunan 410082, China;State Key Laboratory of Advanced Design and Manufacturing for vehicle body, Hunan University, Changsha, Hunan 410082, China;State Key Laboratory of Advanced Design and Manufacturing for vehicle body, Hunan University, Changsha, Hunan 410082, China
2.
*Correspondence author
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Funding: National Natural Science Foundation of China （No.51275162）, Collaborative Innovation Center Open Foundation of Jiangxi University of Science and Technology （No.16XTKFYB03）
Opened online:13 March 2018
Accepted by: none
Citation: Zhou Bing,Long Lefei,Wu Xiaojian.Optimization Design of Hydraulically Interconnected Suspension Based on Orthogonal Experiment[OL]. [13 March 2018] http://en.paper.edu.cn/en_releasepaper/content/4743695
 
 
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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