Measuring Method of Wheel Axle Side Slip Angle and Cornering Stiffness Based on Fourier Transform

A technology of Fourier transform and cornering stiffness, which is applied in wheel testing, measuring devices, elastic testing, etc., can solve the problems of high cost and difficult configuration of optical sensors, robustness and practicality to be improved, and limited scope of application, etc., to achieve The effect of low measurement cost, not easy to be disturbed by the external environment, and wide application range

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Problems solved by technology

However, the scope of application of traditional methods is limited, and it is difficult to be used for real-time control. The cost of advanced optical sensors is too high to be configured in mass-produced vehicles. The robustness and practicality of advanced algorithms such as Kalman filtering or state observers still need to be improved.

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  • Measuring Method of Wheel Axle Side Slip Angle and Cornering Stiffness Based on Fourier Transform
  • Measuring Method of Wheel Axle Side Slip Angle and Cornering Stiffness Based on Fourier Transform
  • Measuring Method of Wheel Axle Side Slip Angle and Cornering Stiffness Based on Fourier Transform

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Embodiment Construction

[0025] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] This measurement method is based on the harmonic response mechanism of the vehicle system, so the test scenarios mainly include the following two types: (1) Under the external harmonic excitation, the general vehicle will show the harmonic response under the forced vibration, such as passenger car Standard serpentine pile test; (2) Under external non-periodic excitation, special vehicles will show harmonic response under free vibration, such as the dynamic critical oscillation test triggered by high-speed articulated vehicles under pulse excitation.

[0027] Such as figure 1 Shown, a kind of measuring method of wheel axle slip angle and cornering stiffness based on Fourier transform of the present invention comprises the following steps:

[0028] (1) Calculate the axle slip angle and wheel slip angle, and obtain the wheel speed through...

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Abstract

The invention discloses a method for measuring wheel axle side slip angle and cornering stiffness based on Fourier transform, comprising the following steps: obtaining the axle side slip angle and wheel side slip angle; obtaining wheel lateral force and axle lateral force; Calculate wheel cornering stiffness and axle cornering stiffness. The present invention has a wide range of applications and various measurement objects. The present invention can be applied to both ordinary passenger cars and complicated articulated vehicles, and can be applied to both four-wheel vehicles and two-wheel or multi-wheel vehicles; The cost is low, and the present invention does not need to use advanced and expensive optical sensors to measure the wheel slip angle and axle slip angle, and only needs common vehicle-grade wheel speed sensors, wheel lateral force sensors or wheel sextants.

Description

technical field [0001] The invention relates to a method for measuring the side slip angle and cornering stiffness of a wheel axle, in particular to a method for measuring the side slip angle and cornering stiffness of a wheel axle based on Fourier transform. Background technique [0002] The wheel / axle side slip angle and cornering stiffness during vehicle driving are key vehicle parameters and states used to evaluate dynamic performance such as vehicle handling stability, and to realize precise control of automotive electronic control systems and intelligent vehicle assistance or unmanned driving technology information. How to estimate and measure both at low cost and in real time accurately in engineering practice has always been one of the goals of the research and development personnel of automotive engineering. At the same time, obtaining the more accurate wheel / axle cornering stiffness, an important parameter, is also an essential basis for establishing a vehicle dyn...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M17/013G01M5/00G01B21/26
CPCG01B21/26G01M5/0075G01M17/013
Inventor 张宁马慧李田赵子乾吴建华
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