Global optimization of super mini vehicles suspension in full range of sprung mass

作者：Chen Long^*; Zhang Jinchao; Wang Ruochen; Xu Xing

来源：Journal of Jiangsu University(Natural Science Edition), 2012, 33(5): 502-507.

DOI：10.3969/j.issn.1671-7775.2012.05.002

• Body postures
• Dynamic type
• Limit values
• Multi objective
• Performance requirements
• Rear suspension
• Ride comforts
• Simulated annealing algorithms
• Simulation data
• Simulation model
• Sprung mass
• Stiffness coefficients
• Weighted Sum

In order to keep ride comfort of super mini vehicle well at all range of sprung mass, a dynamic model of the half vehicle with 5-DOF was established. In the proposed model, the centroid was defined by the change of sprung mass. A technique of two dimensional multi-objective based on simulated annealing algorithm was developed. The actual vehicle passage situation, the weighted sum of the seat mass acceleration, front and rear suspension working space(SWS), front and rear dynamic type displacement (DTD) and the dynamic body posture with different loads were taken as optimization objectives, while the damper and stiffness coefficients of suspension were taken as optimum variables. The optimum simulation data were compared to give the improved seat mass accelerations of 17.58% and 19.03% at the speed of 50 km&middoth-1 with 75 kg and 150 kg passenger mass, respectively. The other parameters can still satisfy the performance requirements. The test results can verify the correctness of the simulation model and the validity of the proposed method. After optimization, the comfort lowering limit value with different loads and speeds are increased, and the ride comfort is improved significantly.

• 出版日期2012