Method for estimating lateral force of tire

A lateral force and tire technology, which is applied in automobile tire testing and other directions, can solve problems such as slow calculation speed, complex algorithm, and large amount of calculation, and achieve the effect of less fitting parameters, good real-time performance, and improved observation accuracy

Active Publication Date: 2015-04-22
TSINGHUA UNIV
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Problems solved by technology

However, the algorithm of the magic tire model is complex and has a large amount of calculation. If it is applied to a real vehicle controller, it will lead to disadvantages such as slow calculation speed and poor real-time performance.

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  • Method for estimating lateral force of tire
  • Method for estimating lateral force of tire
  • Method for estimating lateral force of tire

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Embodiment Construction

[0012] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0013] Such as figure 1 As shown, the tire lateral force estimation method of the present invention comprises the following steps:

[0014] 1. Set up a tire lateral force estimation system, which includes a wheel center longitudinal velocity sensor 1 arranged in the vehicle controller for collecting the wheel center longitudinal velocity of the tire; a road surface adhesion coefficient arranged in the vehicle state observer Sensor 2 is used to collect the road surface adhesion coefficient; a tire vertical force sensor 3 arranged on the suspension spring is used to collect the vertical force of the tire; a tire slip angle sensor 4 arranged on the vehicle state observer is used to for collecting the side slip angle of the tire; a tire slip rate sensor 5 arranged at the vehicle controller for collecting the slip rate of the tire; a lateral force estimat...

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Abstract

The invention relates to a method for estimating the lateral force of a tire. The method comprises the following steps of (1) setting a tire lateral force estimation system comprising a wheel center longitudinal speed sensor, a road surface attachment coefficient sensor, a tire vertical force sensor, a tire sideslip angle sensor, a tire slippage rate sensor and a lateral force estimation module; (2) estimating a quasi-static lateral force value of the tire according to an acquired tire slippage rate value, an acquired tire vertical force value, an acquired tire sideslip angle and an acquired road surface attachment coefficient value by using the lateral force estimation module; (3) establishing a dynamic tire model according to a relationship between the dynamic lateral force and the quasi-static lateral force of the tire, and correcting the quasi-static lateral force value, which is estimated in the step (2), of the tire through the dynamic tire model according to acquired wheel center longitudinal speed to obtain a dynamic tire lateral force value by using the lateral force estimation module; and (4) transmitting the dynamic tire lateral force value obtained in the step (3) to a vehicle controller to control and monitor a vehicle. The method can be widely applied to the real-time estimation of the lateral force of the tire.

Description

technical field [0001] The invention relates to a method for estimating the lateral force of a vehicle, in particular to a method for estimating the lateral force of a tire. Background technique [0002] Tire lateral force is directly related to factors such as tire side slip angle, vertical load, wheel camber angle, longitudinal slip rate, wheel speed and tire pressure. It is an important part of vehicle lateral dynamics and affects the safety and stability of the vehicle. If the lateral force of the tire can be accurately known, the dynamic control effect of the vehicle will be effectively improved. The estimation of the tire lateral force depends on the tire model. When estimating the tire lateral force, the current common estimation methods all use the quasi-static tire model. However, the quasi-static tire model is only effective when the vehicle speed is approximately constant or changes very little. Once the vehicle speed changes rapidly, the fitting accuracy will dr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/02
Inventor 李克强褚文博罗禹贡戴一凡连小珉杨殿阁王建强郑四发边明远陈龙张书玮罗剑曹坤
Owner TSINGHUA UNIV
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