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低地板有轨电车平稳性影响要素分析
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作者 刘帅 李振乾 +2 位作者 梁树林 周亚波 池茂儒 《机械制造与自动化》 2024年第2期203-208,共6页
针对某低地板有轨电车在车辆设计阶段平稳性指标超标的问题,从车辆参数和轨道激励两个方面进行原因探析。通过对车辆关键参数的优化分析可知:降低二系刚度和阻尼能够适当地改善车辆的运行平稳性,但过小的刚度和阻尼在工程应用中难以实... 针对某低地板有轨电车在车辆设计阶段平稳性指标超标的问题,从车辆参数和轨道激励两个方面进行原因探析。通过对车辆关键参数的优化分析可知:降低二系刚度和阻尼能够适当地改善车辆的运行平稳性,但过小的刚度和阻尼在工程应用中难以实现。通过对美国五级谱和德国高干扰谱进行时频域特征分析可知:轨道谱短波高频振动能量较大是有轨电车平稳性超标的原因,建议定期对钢轨进行打磨,以此来控制轨道短波的振动能量。 展开更多
关键词 有轨电车 平稳性超标 车辆参数优化 轨道谱激励 时频域分析
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Fractional order PID control for steer-by-wire system of emergency rescue vehicle based on genetic algorithm 被引量:7
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作者 XU Fei-xiang LIU Xin-hui +2 位作者 CHEN Wei ZHOU Chen CAO Bing-wei 《Journal of Central South University》 SCIE EI CAS CSCD 2019年第9期2340-2353,共14页
Aiming at dealing with the difficulty for traditional emergency rescue vehicle(ECV)to enter into limited rescue scenes,the electro-hydraulic steer-by-wire(SBW)system is introduced to achieve the multi-mode steering of... Aiming at dealing with the difficulty for traditional emergency rescue vehicle(ECV)to enter into limited rescue scenes,the electro-hydraulic steer-by-wire(SBW)system is introduced to achieve the multi-mode steering of the ECV.The overall structure and mathematical model of the SBW system are described at length.The fractional order proportional-integral-derivative(FOPID)controller based on fractional calculus theory is designed to control the steering cylinder’s movement in SBW system.The anti-windup problem is considered in the FOPID controller design to reduce the bad influence of saturation.Five parameters of the FOPID controller are optimized using the genetic algorithm by maximizing the fitness function which involves integral of time by absolute value error(ITAE),peak overshoot,as well as settling time.The time-domain simulations are implemented to identify the performance of the raised FOPID controller.The simulation results indicate the presented FOPID controller possesses more effective control properties than classical proportional-integral-derivative(PID)controller on the part of transient response,tracking capability and robustness. 展开更多
关键词 steer-by-wire system emergency rescue vehicle fractional order proportional-integral-derivative(FOPID)controller parameter optimization genetic algorithm
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