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Heavy-duty combination vehicle parameter estimation method

A technology of parameter estimation and heavy-duty vehicles, applied in the field of parameter estimation of heavy-duty vehicle trains, can solve the problems of high sensor cost, reduced practicability, poor real-time complexity of models and algorithms, etc., to achieve real-time estimation, improve calculation speed, improve The effect of estimation accuracy

Inactive Publication Date: 2016-03-23
JILIN UNIV
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Problems solved by technology

The model-based method has poor real-time performance due to the complexity of the model and algorithm; while the sensor-based method greatly reduces the practicability due to the high cost of the sensor

Method used

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  • Heavy-duty combination vehicle parameter estimation method
  • Heavy-duty combination vehicle parameter estimation method
  • Heavy-duty combination vehicle parameter estimation method

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Embodiment Construction

[0037] The research object of the present invention is a heavy-duty vehicle train, especially a vehicle equipped with an electronically controlled air pressure braking system and an electronically controlled air suspension system. The longitudinal acceleration is measured by the acceleration sensor; the spring height is measured by the height sensor; the brake pressure is measured by the pressure sensor. In the starting stage of the vehicle, when the acceleration is small, the fluctuation is large, so the estimation method preferably performs quality estimation when the acceleration is greater than the minimum threshold. Since the quality of heavy vehicles changes little during operation, the mass of the whole vehicle is regarded as a constant; and the change of braking deceleration leads to the change of the position of the center of mass, so this estimation method prefers that when the braking deceleration is greater than the minimum threshold, every interval of 0.5m / s- 2 ...

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Abstract

The invention discloses a heavy-duty combination vehicle parameter estimation method. The method aims at estimating the road slope, the whole vehicle mass and the location of the center of mass online in real time according to the environment sensing device information and sensor information of a heavy-duty combination vehicle. According to the method, the influence on slope estimation precision of the pitch angle is sufficiently considered, and the real road slope is obtained by subtracting the pitch angle, calculated by an air spring height sensor, of a motor tractor from the estimated road slope calculated according to the environment sensing device information; according to mass estimation, the influence on slope resistance and air resistance is sufficiently considered, the air resistance is estimated as the unknown quantity, and the estimation precision is improved; according to electric control air braking system pressure sensor information, the location of the center of mass is estimated.

Description

technical field [0001] The present invention is designed for a parameter estimation method and system for vehicles, especially heavy vehicle trains. Background technique [0002] With the development of electronic technology, the integrated control of automotive electronic control systems has greatly improved the level of automotive electronics and intelligence, and is playing an increasingly important role in automotive active safety and driving comfort. The electronic control system judges the running state of the vehicle through the vehicle parameter information and then makes control decisions. Therefore, accurate vehicle parameter information is particularly important for electronic control systems. Although sensors can provide vehicle and environmental information to the electronic control system, such as vehicle speed, wheel speed, acceleration, and brake pressure, etc., it is difficult to measure road gradient, vehicle mass, and center of mass position through senso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W40/076B60W40/105B60W40/107B60W40/11B60W40/13B62D53/06
CPCB60W40/076B60W40/105B60W40/107B60W40/11B60W40/13B60W2040/1315B60W2520/10B60W2520/105B60W2520/16B60W2530/10B60W2552/15B62D53/06
Inventor 郑宏宇王琳琳万滢赵伟强宗长富
Owner JILIN UNIV
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