Joint optimization method for vehicle speed planning and energy management of fuel cell vehicle

Abstract

The invention discloses a joint optimization method for vehicle speed planning and energy management of a fuel cell vehicle, and the method comprises the following steps: S1, building a vehicle dynamics model through combining vehicle key technical parameters and a vehicle power system power topological structure; s2, performing convex processing on a fuel cell system model, a motor system model and a power cell system model in the vehicle dynamics model; s3, establishing a traffic signal timing model in combination with the traffic signal lamp information; s4, based on the vehicle dynamics model and the traffic signal timing model, solving the vehicle speed planning problem of the fuel cell vehicle passing through the multiple signal lamps by using a double-layer dynamic planning algorithm, and generating an optimal vehicle speed track; s5, solving an energy management problem of the vehicle under the optimal vehicle speed track generated in the step S4 by using a convex optimization algorithm; the problem of combined optimization of vehicle speed planning and energy management of the fuel cell vehicle in a multi-continuous-signal-lamp scene is solved.

Description

technical field [0001] The invention relates to the technical fields of speed planning and energy management of fuel cell vehicles, in particular to a combined optimization method for speed planning and energy management of fuel cell vehicles. Background technique [0002] At present, environmental pollution and energy shortage have become two major problems facing the development of the automobile industry. As an important branch of new energy vehicles, fuel cell vehicles have the advantages of high efficiency, cleanliness, and zero pollution, and have gradually become a research hotspot in the industry. [0003] Energy management strategy is a hot and difficult point in the field of fuel cell vehicles, and is the core technology of fuel cell vehicles. It directly determines the economy, power and driving performance of the vehicle, and is of great significance. The main task of energy management is to realize the optimal distribution of power source power or torque under ...

AI Technical Summary

Problems solved by technology

[0005] Throughout the research at home and abroad, the speed planning and energy management solutions for traditional fuel vehicles, electric vehicles, and hybrid vehicles have been proposed under different road conditions, but the speed planning and energy management solutions for fuel cell vehicles The research on joint optimization of energy management is still in a blank stage, and it is an urgent scientific problem to be solved

Images