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电动汽车复合制动系统过渡工况协调控制策略

DOI: 10.3969/j.issn.1006-7043.201303023

Keywords: 电动汽车, 复合制动, 再生制动, 过渡工况, 控制策略, 电机力补偿

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Abstract:

液压制动与电机再生制动互相切换的过渡工况控制是电动汽车复合制动系统控制需要解决的关键技术问题,直接影响到驾驶员的制动感觉与车辆制动舒适性。对此提出一种协调控制策略,包括制动力分配修正和电机力补偿2个模块。制动力分配修正模块针对液压制动力介入、撤出和再生制动力低速撤出3类典型过渡工况修正分配结果;电机力补偿模块利用电机系统迅速准确的响应来补偿液压系统,改善复合系统的响应。对各类典型制动过渡工况进行仿真验证,结果表明,所设计的协调控制策略能有效减小实际总制动力波动和偏差,改善驾驶员的制动感觉和车辆制动舒适性。

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