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Self-adaptive starting control method for four-wheel hub electric automobile

An electric vehicle, self-adaptive technology, applied in the direction of electric vehicles, control drives, control devices, etc., can solve problems such as vehicle slippage, excessive impact, etc.

Inactive Publication Date: 2016-08-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an adaptive starting control method for a four-wheel hub electric vehicle, which prevents the vehicle from slipping or impacting due to the unskilled operation of the driver when the four-wheel hub electric vehicle starts. big problem

Method used

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  • Self-adaptive starting control method for four-wheel hub electric automobile
  • Self-adaptive starting control method for four-wheel hub electric automobile
  • Self-adaptive starting control method for four-wheel hub electric automobile

Examples

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Embodiment

[0057] figure 1 It is a flowchart of an adaptive starting control method for a four-wheel hub electric vehicle of the present invention.

[0058] In this example, if figure 1 As shown, a kind of four-wheel hub electric vehicle self-adaptive starting control method of the present invention comprises the following steps:

[0059] S1. Ramp recognition based on Lomberg state observer

[0060] In the normal driving phase before the electric vehicle is parked, a linear Lomberg state observer is used, such as figure 2 As shown, real-time estimation of the slope of the electric vehicle driving road;

[0061] m v · = F t - F f - F b - F i = Ti g i o ...

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Abstract

The invention discloses a self-adaptive starting control method for a four-wheel hub electric automobile. The self-adaptive starting control method for the four-wheel hub electric automobile comprises the following steps of estimating a vehicle running gradient through an Luenburg state observer in real time and obtaining a hill-holding torque, which is needed to keep the vehicle in a static at the gradient, according to vehicle kinetics equation; meanwhile, selecting a vehicle speed as a control target and outputting a compensating torque through PID feedback closed-loop control; and finally, overlaying the hill-holding torque and the compensating torque and inputting the overlaid torque into a motor after being amplitude-limited and filtered so as to drive the vehicle to be stably started on a ramp. According to the invention, drivers do not need to intervene in the starting process; the vehicle cannot slide in the uphill starting process through automatically calculated torque.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, and more specifically relates to an adaptive starting control method for a four-wheel hub electric vehicle. Background technique [0002] At present, the hill starting method of electric vehicles is in the research stage, which mainly includes the following categories: feedback starting control method, automatic starting control method, starting control method based on HSA (Hill Starting Aid, hill assist) system, and based on motor blockage. Adaptive launch control method for turning characteristics, etc. Yet all there is the problem of long-distance slippery slope when starting on a slope in these methods. In addition, the above method does not introduce the shock degree of the electric vehicle as a control variable into the design of the control strategy, which will inevitably lead to problems such as severe body shaking when the driver is driving the electric vehicle, and in more se...

Claims

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Application Information

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IPC IPC(8): B60L15/20
CPCB60L15/2081B60L2220/44B60L2240/12B60L2240/423B60L2240/642B60L2260/28Y02T10/72
Inventor 辛晓帅王攀邹见效徐红兵彭超张健
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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