Fuzzy Adaptive Equivalent Consumption Minimization Strategy for Hybrid Electric Vehicle Based on Power Ratio[J]. 2022, 56(1): 12-21.
DOI:
Fuzzy Adaptive Equivalent Consumption Minimization Strategy for Hybrid Electric Vehicle Based on Power Ratio[J]. 2022, 56(1): 12-21.DOI: 10.7652/xjtuxb202201002.
Fuzzy Adaptive Equivalent Consumption Minimization Strategy for Hybrid Electric Vehicle Based on Power Ratio
Aiming at the poor cycle adaptability of the equivalent consumption minimization strategy(ECMS)with calibrated constant equivalence factor
this paper proposes a power ratio based adaptive ECMS(PR-AECMS)for hybrid electric vehicles(HEV). For the power split HEVs
an explicit adaptive model that corrects the equivalence factor of the ECMS with the battery state of charge(SOC)is established. Aiming at the deficiency of the adaptive method in correcting the equivalent factor only based on the feed-back SOC
the average power of the adjacent time periods is introduced as the feed-forward correction variable of the equivalent factor. The impacts of different factors
such as the average power of the adjacent time periods
the battery charging and discharging behavior in the previous period
and different real-time and reference values of battery SOC
on the correction mechanism of the equivalence factor are studied. Then
the adaptive solving method of the equivalence factor based on multi-fuzzy controller switching is proposed. The switching logic of different fuzzy controllers is determined according to the previous average power and the current battery SOC. The SOC variation value of the previous time period and the ratio of current average power to previous one are set as the inputs of the different fuzzy controllers. Based on the global optimization results under standard cycles
the fuzzy control parameters are designed. Simulation results under different standard test cycles demonstrates that
compared with the AECMS without power ratio correction
the proposed PR-AECMS possesses better equivalent fuel economy and battery charging balance in a wide range of driving cycles. The cycle adaptability of the ECMS is effectively improved.
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