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Braking Controller Based on Real-time Road Observation

A braking controller and observer technology, applied in the direction of brakes, etc., can solve the problem of not ensuring optimal braking torque distribution and maximum regenerative energy efficiency, and achieve the effect of improving battery life and improving regeneration efficiency.

Active Publication Date: 2021-07-09
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FLC is more robust, but cannot guarantee optimal braking torque distribution and maximum regenerative energy efficiency

Method used

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  • Braking Controller Based on Real-time Road Observation
  • Braking Controller Based on Real-time Road Observation
  • Braking Controller Based on Real-time Road Observation

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Experimental program
Comparison scheme
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Embodiment Construction

[0060] 1 System structure and model

[0061] 1.1 System structure

[0062] The present invention adopts the brake system of parallel hybrid electric vehicle, and the structure is as follows: figure 1shown. The front wheels are friction braked, while the rear wheels are hydraulically and regeneratively braked. During the braking process, the brake control unit ensures the braking performance through the control of the slip ratio, so as to determine the total braking torque and distribute it to the front and rear axles. The regenerative braking controller is used for braking torque distribution between hydraulic friction braking and regenerative braking.

[0063] 1.2 Vehicle model

[0064] Consider the longitudinal dynamics of the vehicle from the point of view of slip ratio control or ABS control, figure 2 The middle 1 / 4 vehicle model is used to describe the forces on the wheels during braking. figure 2 middle, T b Indicates the braking torque, ω w is the angular velo...

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Abstract

The braking controller based on real-time road surface observation belongs to the field of electric vehicle braking force control and distribution, and solves the problem of taking into account the braking performance and regenerative braking efficiency of the braking system of hybrid electric vehicles. The scheme is that the braking controller is expressed as: where , b 2 , b 3 is the system parameter, which is the road surface adhesion coefficient observer obtained by real-time online estimation of uncertainty factors by the observer. The effect is that the nonlinear road surface observer can be used to estimate and compensate road uncertainty and vehicle load changes online.

Description

technical field [0001] The invention belongs to the field of electric vehicle braking force control and distribution, and relates to a braking controller based on real-time road surface observation. Background technique [0002] Hybrid electric vehicles (HEVs) take into account the advantages of traditional internal combustion engine vehicles and pure electric vehicles, and have great potential in reducing fuel consumption and emissions. The torque fast response characteristic of the electric motor and the regenerative braking are two important characteristics of the hybrid electric vehicle. A regenerative braking system converts kinetic energy into electricity via a generator, which is stored in the battery during braking. The application of electric motors and regenerative braking enables HEVs to achieve better braking performance and more regenerative energy, especially in congested urban traffic. However, the regenerative braking torque is usually not enough to provide...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T8/176B60T8/1763
CPCB60T8/176B60T8/1763
Inventor 赵秀春葛平淑张涛张江燕王爽
Owner DALIAN NATIONALITIES UNIVERSITY