Traction control system used for multi-axis distributed electromechanical drive vehicle

Abstract

The invention discloses a traction control system used for a multi-axis distributed electromechanical drive vehicle. It can be guaranteed that tires work in a region with the large attachment coefficient, and the travel capacity of the vehicle on a cross-country road surface is improved. A hardware module of the system is mainly composed of front two-axle wheels, rear two-axle wheels, four permanent magnet synchronous drive motors, four hub reduction gears, a yaw velocity sensor, a longitudinal acceleration sensor, a lateral acceleration sensor, an installation box, a whole vehicle controller and a steering wheel angle sensor. A software module of the traction control system in the whole vehicle controller comprises a driver moment requirement translation module, a wheel state judgment module, a drive moment control module and a wheel vertical load estimation module.

Description

technical field [0001] The invention belongs to the field of vehicle drive control systems, in particular to a traction force control system for multi-axis distributed electromechanical drive vehicles. Background technique [0002] For a long time, multi-axle vehicles have been more and more widely used in the fields of military wheeled vehicles and civilian heavy-duty wheeled vehicles due to their outstanding advantages such as reasonable load distribution, strong power, and good passability. However, traditional multi-axle vehicles have disadvantages such as complex structure and inflexible distribution of driving force between axles and wheels. Taking an all-wheel drive 8×8 vehicle as an example, it requires at least 4 inter-wheel differentials and 3 inter-axle differentials. engine for all-wheel drive. Therefore, there is a distributed electromechanical drive vehicle scheme as proposed in publication number CN103587403A. The wheels of the front two axles are driven by t...

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Problems solved by technology

[0004] However, the existing vehicle traction control systems are all developed based on 4-wheel civil vehicles, and there are no reports on multi-axle vehicles such as 8×8

At the same time, for the existing traction control system, the control target parameter adopted is a single wheel slip rate, which does not cover the extreme working conditions of the wheel off the ground; Decrease the slip ratio, and most of the reduced wheel torque does not increase to other wheels, resulting in a certain degree of reduction in power performance

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