摘要
A novel design method of control strategy for a parallel hybrid electric vehicle is proposed. The sequential quadratic programming（SQP） is first used to solve the optimal problem of maximizing system efficiency in terms of the global optimization. And then a fuzzy logic controller is developed to implement the optimal control strategy for a tradeoff between the engine and the battery in local. In addition, the performance of the fuzzy system is improved by optimizing the fuzzy rules based on the SQP results. Simulation results show that the proposed control strategy achieves better fuel economy under the duty cycle.
提出了一种新颖的能量控制策略的设计方法用于并联式混合动力车。首先用SQP算法求解最大系统效率问题以实现全局优化;然后用模糊控制系统来协调发动机和电池的工作点实现局部优化。模糊系统的模糊规则建立则是汲取了SQP优化结果,从而保证全局与局部的统一。计算机仿真结果表明,运用该能量控制策略的混合动力车能达到较好的燃料经济性。
