Automobile rollover prevention system based on driver input prediction and control strategy

A driver input and control strategy technology, applied to driver input parameters, control devices, vehicle components, etc., can solve the problems of inability to take driving intention into account, rollover evaluation index hysteresis, and inability to estimate rollover status, etc.

Active Publication Date: 2017-07-14
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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AI Technical Summary

Problems solved by technology

However, using the existing anti-rollover control strategy inevitably has the following problems: first, there is a time lag in the control system, so that the obtained rollover evaluation index has a hysteresis; second, the driving intention cannot be considered; 3. It is impossible to estimate the rollover state in the future

Method used

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  • Automobile rollover prevention system based on driver input prediction and control strategy
  • Automobile rollover prevention system based on driver input prediction and control strategy
  • Automobile rollover prevention system based on driver input prediction and control strategy

Examples

Experimental program
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Embodiment

[0156] The simulation working condition is selected as J-Turn test. In the J-Turn test, the initial speed of the vehicle is 100km / h, the road surface adhesion coefficient is 0.85, the maximum steering wheel angle is 180°, and the steering wheel angle input is as follows: Figure 4 Shown:

[0157] Such as figure 1 Process shown:

[0158] (1) The sensor receives the steering wheel angle signal of the vehicle and outputs the steering wheel angle δ sw To the steering wheel estimation unit, receive the vehicle speed signal v and output it to;

[0159] (2) The steering wheel angle estimation unit predicts the steering wheel input value δ at the future moment by calculating swf , and output this estimated value to the vehicle parameter estimation unit to predict the parameters related to vehicle rollover.

[0160] (3) The vehicle parameter estimation module predicts the value δ according to the steering wheel angle swf and the vehicle speed v, calculate the predicted value a of...

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Abstract

The invention discloses an automobile rollover prevention system based on driver input prediction and a control strategy. The vehicle rollover prevention system comprises a sensor module, a steering wheel rotating angle estimation unit, a front wheel differential brake module, a rollover evaluation unit and a controller ECU. According to the automobile rollover prevention system and the control strategy, a steering wheel input value of a vehicle model is predicted on line through a grey prediction model, a predictable automobile rollover evaluation index is proposed based on the steering wheel input value, an estimation model of the lateral-load transfer rate (LTR) of a passenger car is built, and when the LTR estimation value of the vehicle reaches a rollover threshold value, rollover prevention control is conducted through the front wheel differential brake module, and the influence of time lag of a control system on rollover judgment is avoided.

Description

technical field [0001] The invention belongs to the technical field of automobile safety, and in particular relates to an automobile rollover prevention system and control strategy based on driver input prediction. Background technique [0002] The appearance of automobiles has brought great changes to the way of life of human beings. The rapid development of the automobile industry and the continuous improvement of the economic level have promoted the popularization and use of automobiles. At the same time, it has also brought a series of social problems. With the increasing popularity of automobiles and the increase of road traffic, road traffic accidents have become an increasingly serious public safety problem worldwide and a major public hazard in modern society. [0003] Some vehicles, such as SUVs, buses, and heavy-duty semi-trailers, are prone to rollover accidents due to their high center of mass, relatively large mass and volume, and relatively narrow wheelbase. W...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/10B60W50/00
CPCB60W40/10B60W50/0097B60W2520/10B60W2540/18B60W2710/20
Inventor 金颖智赵又群
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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