Self-adaptive balance steering control method of double-hub motor driving system

Abstract

The invention provides a self-adaptive balance steering control method of a double-hub motor driving system. A basic control system comprises an electronic differential speed special processor, a left hub brake driving circuit, a left hub acceleration driving circuit, a left hub motor controller, a right hub brake driving circuit, a right hub acceleration driving circuit, a right hub motor controller, a left wheel rotation speed sensor, a right wheel rotation speed sensor, an inter-locking switch circuit, a vehicle body balance degree prejudging device, a front acceleration sensor, a tail acceleration sensor, a steering sensor, an acceleration pedal and a communication interface. The method has the advantage that a method for evaluating a vehicle steering safety degree is established by utilizing steering sensing information, vehicle body tilting degree information, vehicle speed and vehicle speed deviation rate, an electronic brake processing method is adopted in the field of steering control, and then the steering balance of the double-hub motor driving system can be controlled more efficiently and accurately, so the stability of the vehicle in the running process is improved.

Description

technical field [0001] The invention relates to an electric vehicle driving control method integrating electronic differential speed and steering balance control, and the method is suitable for four-wheel electric vehicles adopting double-hub motor front-drive or double-hub motor rear-drive. Background technique [0002] Four-wheel electric vehicles generally include two types of drive structures, one is a single-motor bridge drive structure, and the other is a double-hub drive structure. The single-motor bridge drive structure adopts a mechanical differential speed method to ensure steering balance. This differential speed method responds quickly, but due to the addition of a rear axle, the transmission efficiency is reduced and the vehicle's dead weight is increased. The double-hub drive structure is generally equipped with an electronic differential. , using electronic differential to control the steering balance, the double-hub drive structure removes the rear axle, and ...

AI Technical Summary

Problems solved by technology

The single-motor bridge drive structure adopts a mechanical differential speed method to ensure steering balance. This differential speed method responds quickly, but due to the addition of a rear axle, the transmission efficiency is reduced and the vehicle's dead weight is increased. The double-hub drive structure is generally equipped with an electronic differential. , using electronic differential to control the steering balance, the double-hub drive structure removes the rear axle, and its two driving wheels can be controlled independently, which not only reduces the weight of the vehicle body, but also increases the flexibility of control

The problem with the dual-hub drive structure is that complex control strategies are required to ensure the stability and reliability of the vehicle's turning. For now, there is no good steering balance control method for the dual-hub drive system.

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