Parameter optimization design method for fuzzy controller of composite power supply system

Abstract

The invention discloses a parameter optimization design method for a fuzzy controller of a composite power supply system. The method comprises the following steps: step 1, selecting the service life as an optimization target according to function demands of a composite power supply system, and optimizing controller parameters of a fuzzy controller; step 2, constructing a power distribution fuzzy controller, and setting the controller as a three-input-single-output structure; step 3, keeping the fuzzy control rule unchanged, and optimizing the weight of an input variable; step 4, optimizing a fuzzy control rule and input and output variable weights at the same time; and step 5, substituting the optimized input variable weight and the fuzzy control rule back to the fuzzy controller, and verifying the optimized control effect. According to the method, the controller parameters of the HESS fuzzy controller can be optimized, the performance of the HESS in the operation process can be improved, and the comprehensive performance of the electric vehicle is improved.

Description

Technical field: [0001] The invention relates to a parameter optimization design method for a fuzzy controller of a composite power supply system, which belongs to the field of composite power supply systems of new energy vehicles. Background technique: [0002] The development of new energy vehicle technology is an important decision in my country's science and technology strategy, and it is also the most effective way to solve the problems of environmental pollution and energy shortage. Among new energy vehicles, pure electric vehicles have become the focus of common attention in the industry and are the core contributor to the growth of new energy vehicle ownership. Compared with traditional internal combustion engine vehicles and hybrid vehicles, pure electric vehicles have many advantages such as high efficiency, energy saving and environmental friendliness. [0003] The power battery system is the only energy source during the driving of pure electric vehicles, and th...

AI Technical Summary

Problems solved by technology

However, most power distribution controllers based on fuzzy logic often rely on engineering experience, and there is greater subjectivity in setting input and output variables and formulating fuzzy rules. When designers lack experience, they need to repeatedly correct fuzzy rules, which is difficult to ensure controller reliability

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