纯电动汽车驱动控制策略仿真分析

Simulation Analysis of Driving Control Strategy for Pure Electric Vehicle

为了同步提升纯电动汽车动力性和操控性,将驾驶意图分为稳态意图和动态意图,汽车的操控性由稳态意图来保证,动力性由动态意图来保证,在此基础上提出一种基于驾驶员意图识别的纯电动汽车动力性驱动控制策略。该策略采用典型工作点分段插值法来识别驾驶员的稳态意图,并定义了驾驶员的动态意图,采用动态补偿转矩保持和动态补偿转矩归零等算法计算动态补偿转矩。仿真结果表明,该策略既可以根据驾驶员稳态意图保证汽车的操控性,也可根据驾驶员动态意图提高汽车的动力性,较好地实现了提升纯电动汽车动力性和操控性的目的。

To synchronously improve the power performanee and handling of pure electric vehicles, driving intention is divided into steadystate intention and dynamic intention, which are used to ensure respectively the handling and power performanee. On this basis, a power driving control strategy of pure electric vehicle based on driver intention recognition is proposed. With this strategy, the typical working point pieeewise interpolation method is used to identity the driver＇s steadystate intention, and the driver＇s dynamic intention is defined. The maintenance and zeroing algorithms tor dynamic compensation torque are adopted to calculate dynamic compensation torque. The sinmlation resuhs show that the strategy can not only guarantee the vehicle handling according to the driver＇s steadystate intention, but also improve the vehicle power performanee according to the driver＇s dynamic intention, which better realizes the promotion purpose of pure electric vehicle＇s power performanee and handling.