Stability and energy-saving control system for distributed drive electric automobile

Abstract

The invention discloses a stability and energy-saving control system for a distributed drive electric automobile, and belongs to the technical field of control. The stability and energy-saving controlsystem for the distributed drive electric automobile aims to achieve the purposes of improving operation stability of the distributed drive electric automobile and reducing energy consumption by a master-slave control structure and vehicle dynamic control. The system is divided into a driving layer and a driven layer, the driving layer comprises a vehicle reference state module and a vehicle operation stability controller. The stability and energy-saving control system for the distributed drive electric automobile is based on the master-slave structure, the operation stability control and theenergy-saving control of the automobile can be combined, the energy consumption is reduced as much as possible on the premise of ensuring the operation stability of the automobile, and the influenceon the power performance of the automobile is reduced. The operation stability controller actively adjusts the front wheel steering angle of the automobile, independent control over the yaw velocity and the mass center yaw angle of the automobile is realized to a certain extent, and the maneuverability and the stability of the automobile are improved.

Description

technical field [0001] The invention belongs to the technical field of control. Background technique [0002] Electric vehicles use electric energy as the energy source, do not emit harmful gases during operation, and have less pollution. They have become a research hotspot for automobile manufacturers and researchers around the world. The application of in-wheel motor technology in electric vehicles simplifies the vehicle power and transmission, and the control of the vehicle is more direct and accurate. Distributed drive electric vehicles using in-wheel motors can independently control the wheel torque, have redundant control degrees of freedom, and can achieve dynamic control effects that most traditional vehicles cannot achieve. However, in extreme working conditions, it is difficult for the driver to coordinate the vehicle's stability, energy-saving, and power requirements. In this case, the vehicle's stability and energy-saving control should be considered to improve ...

AI Technical Summary

Problems solved by technology

[0003] Distributed drive electric vehicle is a redundant multivariable coupled nonlinear system. The design and analysis of its control system are relatively complex. The realization of the vehicle control system with the goal of stability and energy saving faces a series of challenges: First, under extreme conditions The vehicle stability margin is small, and the road adhesion ability is difficult to meet the needs of automobile tires. The existing control scheme usually cannot guarantee the yaw stability of the vehicle under extreme conditions.

Secondly, the yaw stability control of the vehicle will increase the energy consumption of the whole vehicle, and the handling stability, energy saving performance, and power performance of the vehicle cannot be guaranteed at the same time. performance is also susceptible to energy saving controls

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