摘要
针对液压参数对互联悬架输出响应影响程度大小的问题,建立了四自由度液压互联悬架半车侧倾耦合频域模型,通过计算系统的传递函数及施加路面激励,得到了悬架模型在垂直模态和侧倾模态下的加速度谱密度响应。采用基于模糊灰色关联的灵敏度分析方法对悬架垂直模态和侧倾模态进行分析,得到了各液压参数的灰色关联度。运用多目标优化算法NSGA-Ⅱ,以两种模态下的悬架响应为优化目标,对灵敏度大的液压参数进行了优化。优化后两种模态下加速度功率谱密度峰值及加速度均方根值均有减小,液压互联悬架平顺性得到提高。
In view of the effects of hydraulic parameters of interconnected suspensions on the suspension responses,a four DOF hydraulically interconnected suspension half car roll frequency domain model was established.According to the system transfer function and road inputs the bounce acceleration power spectrum density and roll acceleration power spectrum density were calculated.By using the sensitivity analysis method based on fuzzy grey correlation,the influence degree of hydraulic parameter on bounce response and roll response was carried out.NSGAⅡmethod was used by taking as optimization object under two modes suspension responses.The obtained results indicate that the peak value of acceleration power spectral density is decreased as well as the acceleration root mean square value of the acceleration,and the ride comfort of the hydraulic interconnected suspension is improved.
作者
周兵
陈逸彬
耿元
任程远
ZHOU Bing;CHEN Yibin;GENG Yuan;REN Chengyuan(State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha,410082)
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2017年第19期2269-2274,共6页
China Mechanical Engineering
基金
国家自然科学基金资助项目(51275162
51575167)
国家重点研发计划资助项目(2016YFB0100903-2)
关键词
液压互联悬架
加速度输出谱密度
灵敏度分析
模糊灰色关联
多目标优化
hydraulically interconnected suspension
acceleration power spectrum
sensitivity analysis
fuzzy grey correlation
multi objective optimization
