Wheel axle slip angle and cornering stiffness measuring method based on Fourier transform
A Fourier transform and cornering stiffness technology, applied in wheel testing, measuring devices, elasticity testing, etc., can solve the problems of high cost and difficult configuration of optical sensors, the need to improve robustness and practicality, and the limited scope of application. Low measurement cost, not easy to interfere with the external environment, and the effect of a wide range of applications
Active Publication Date: 2020-04-14
SOUTHEAST UNIV
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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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[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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The invention discloses a wheel axle slip angle and cornering stiffness measuring method based on Fourier transform. The wheel axle slip angle and cornering stiffness measuring method comprises the following steps: obtaining an axle slip angle and a wheel slip angle; acquiring a wheel lateral force and an axle lateral force; and calculating wheel cornering stiffness and axle cornering stiffness. The method is wide in application range and diverse in measurement object, and can be applied to common passenger vehicles and complex articulated vehicles as well as four-wheel vehicles and two-wheelor multi-wheel vehicles; the measurement cost is low; and an advanced and expensive optical sensor does not need to be used for measuring the wheel slip angle and the axle slip angle, and only a common vehicle-level wheel speed sensor, a wheel lateral force sensor or a wheel six-component instrument is needed.
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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Login to View More IPC IPC(8): G01M17/013G01M5/00G01B21/26
CPCG01B21/26G01M5/0075G01M17/013
Inventor 张宁马慧李田赵子乾吴建华
Owner SOUTHEAST UNIV