基于响应面法的半主动悬架天棚控制算法优化  

Optimization of Semi-active Suspensions Skyhook Control Algorithm Based on Response Surface Methodology

作　　者：荣兵 RONG Bing(Yibin Cowin Automobile Co.Ltd.,Yibin 644000,Sichuan,China)

机构地区：[1]宜宾凯翼汽车有限公司,四川宜宾644000

出　　处：《重庆交通大学学报（自然科学版）》2024年第11期114-121,共8页Journal of Chongqing Jiaotong University(Natural Science)

摘　　要：以CDC减振器阻尼系数可调范围为基础,建立连续天棚控制算法,并结合整车多体动力学模型,搭建整车半主动悬架的阻尼控制联合仿真模型。为优化控制算法中前后悬架天棚阻尼系数,首先建立平衡乘坐舒适性和操纵稳定性的综合评价指标,指标由连续中小激励的悬架隔振指标、单个脉冲激励的悬架降振指标、角阶跃的悬架响应指标组成。其次,采用中心复合有界设计定义试验设计策略,通过仿真计算综合评价指标,构建优化变量与综合评价指标之间的二次响应面模型,以综合评价指标最小为优化目标,优化后的前、后悬架天棚阻尼系数分别为5.39、3.61 Ns/mm。最后,通过仿真对比验证,优化后的连续天棚控制算法,在确保与被动悬架操纵稳定性相当的前提下,可大幅提升乘坐舒适性,连续中小激励下悬架隔振舒适性提升20.44%,单次脉冲激励下悬架冲击舒适性提升56.67%。The damping control co-simulation model for the semi-active suspension of the entire vehicle was established,based on continuous skyhook control algorithm within the adjustable damping coefficient range of CDC shock absorbers and vehicle muti-body dynamics model.To optimize the damping coefficient of the front and rear suspension skyhook of the control algorithm,the comprehensive evaluation index was established to balance ride comfort and handling stability,which was consisted of suspension vibration isolation index for continuous small and medium-sized excitations,suspension vibration reduction index for single pulse excitations,and suspension response index for angular step excitations.Secondly,the central composite bounded design was adopted to define DOE strategy,and a quadratic response surface model between the optimization variables and the comprehensive evaluation index was constructed by simulating and calculating the comprehensive evaluation index.The optimization objective was to minimize the comprehensive evaluation index,and the damping coefficients of the front and rear suspension skyhook after optimization were 5.39 and 3.61 Ns/mm,respectively.Finally,the proposed method was verified by simulation and comparison.It is verified that the optimized continuous skyhook control algorithm can significantly improve ride comfort on the premise of ensuring handling stability equivalent to passive suspension.Under continuous small and medium excitation,the suspension vibration isolation comfort is improved by 20.44%,and under single pulse excitation,the suspension impact comfort is improved by 56.67%.

关 键 词：车辆工程 连续天棚控制算法 中心复合有界设计 响应面法 乘坐舒适性和操纵稳定性 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]