摘要
将发动机的瞬时油耗拟合成由一次函数和二次函数组成的分段函数形式,将电池瞬时等效油耗拟合成由两个二次函数组成的分段函数形式,在此基础上,通过对Hamilton函数的分析,提出通过简化最优控制变量搜索空间来缩短寻优时间的近似极小值原理实时控制策略,并将该策略的等效油耗优化效果和计算时间分别与基于规则的CD-CS模式控制策略和基于极小值原理的最优控制策略进行对比。结果表明,上述提出的实时控制策略在等效油耗优化效果方面接近基于极小值原理的最优控制策略,而明显优于基于规则的CD-CS模式控制策略,在计算时间方面接近基于规则的CD-CS模式控制策略,而明显短于基于极小值原理的最优控制策略。
Fit the instantaneous fuel consumption of engine to the piecewise function which is made up of a linear function and a quadratic function, fit the instantaneous equivalent fuel consumption of battery to the piecewise function which is made up of two quadratic function, Based on this, through the analysis of Hamilton function, the approximate pontryagin’s minimum principle real-time control strategy is proposed, which can shorten the optimization time by simplifying the optimal control variable search space, then compare this strategy’s optimization results of equivalent fuel consumption and computation time with the rule-based CD-CS mode control strategy and the optimal control strategy based on pontryagin’s minimum principle. The results show that： in terms of equivalent fuel consumption, optimization results of the real-time control strategy proposed are close to the optimal control strategy based on pontryagin’s minimum principle, but significantly better than rule-based CD-CS mode control strategy; in terms of computation time, the real-time control strategy is close to rule-based CD-CS mode control strategy, but significantly shorter than the optimal control strategy based on pontryagin’s minimum principle.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
2015年第2期134-140,共7页
Journal of Mechanical Engineering
基金
国家科技支撑计划(2013BAG12B01)
重庆市基础与前沿研究计划(cstc2013jcyjjq60002)资助项目
关键词
插电式混合动力汽车
极小值原理
近似极小值原理
实时控制策略
plug-in hybrid vehicle
pontryagin’s minimum principle
approximate pontryagin’s minimum principle
real-time control strategy
