Electric vehicle reliable network-controlled chassis system and control method thereof

Abstract

The invention belongs to the field of electric vehicle chassis control technologies and systems, and particularly relates to an electric vehicle reliable network-controlled chassis system and a control method thereof. A main-auxiliary type redundant three-bus network topology and a layered management function framework are adopted, the electric vehicle reliable network-controlled chassis system comprises a driving subsystem, a steering subsystem, a braking subsystem and a vehicle control unit, and the layered framework includes a state judgment layer, a mode management layer and a strategy management layer. A state management module in the vehicle control unit is divided into a normal state and an auxiliary state according to the bus network state, a mode management module realizes the management of different control strategies, a strategy management module adopts the combination of a controller and a scheduler, a controller module is used for calculating control commands, and a scheduler module is used for scheduling command processing to realize the cooperative management of control strategies and scheduling strategies. The electric vehicle reliable network-controlled chassis system solves the problems of signal transmission delay, unsynchronization and network malfunction of the electric vehicle network-controlled chassis system, and the realtime and the fault-tolerant ability of vehicle chassis control are improved.

Description

technical field [0001] The invention belongs to the field of electric vehicle chassis control technology and systems, in particular to a reliable network-controlled chassis system and control method for electric vehicles. Background technique [0002] Under the trend of "safety, energy saving, and environmental protection", the process of vehicle electrification brought by electric vehicles is accelerating. The new generation of automobile chassis system with electronic control as the core and electric drive, electric brake and electric steering as the executive mechanism has become the trend and frontier of the future development of the automobile industry. The use of drive-by-wire technology eliminates the need for a mechanical transmission system, and the layout of the chassis is more flexible, which can also achieve the optimal distribution of driving force for each wheel; the use of brake-by-wire technology can achieve ideal braking force distribution and improve the br...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the existing technologies, and propose a reliable network-controlled chassis system and control method for electric vehicles, which can effectively solve the sensor-level and actuator-level task conflicts, as well as network-induced signal transmission delays and signal inconsistencies. Synchronization and in-vehicle network failure problems, improve the real-time performance, synchronization and fault tolerance of vehicle chassis control, and provide technical support for improving the actual comprehensive performance of electric vehicle chassis control

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