Nonlinear decoupling method used for wheel force transducers

A sensor and wheel force technology, which is applied in the field of nonlinear decoupling of wheel force sensors, can solve the problems that cannot meet the decoupling requirements of the output signals of wheel force sensors, the number of ANN algorithms is too high, and the implementation process is complicated, so as to achieve practicability Effect of high and low decoupling error, low channel coupling

Active Publication Date: 2019-01-04
NANJING UNIV OF TECH
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Problems solved by technology

Due to the strong coupling, nonlinear and time-varying characteristics of the wheel force signal, in order to obtain a ground-wheel force/torque signal that is very close to the real one, the output signal in the calibration experiment of the wheel force sensor must be nonlinearly decoupled, so Conventional linear decoupling methods based on multiple regression models will produce large decoupling errors, while the nonlinear decoupling

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  • Nonlinear decoupling method used for wheel force transducers
  • Nonlinear decoupling method used for wheel force transducers
  • Nonlinear decoupling method used for wheel force transducers

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[0041] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0042] Such as figure 1 Shown: A nonlinear decoupling method for a wheel force sensor comprising the following steps:

[0043] Step 1: According to the nonlinear and multi-dimensional characteristics of the wheel force sensor system, the sensor input-output relationship can be extended to the form of quadratic equations.

[0044] Wheel force is the general designation of the force and moment that the wheel is subjected to. In the present invention, the wheel is subjected to the effect of three-dimensional force in the actual driving process of the automobile, such as figure 2 Shown, respectively, longitudinal force (Fx), vertical force (Fz) and torque (My). In actual working conditions, wheel forces have the characteristics of strong coupling, nonlinearity, and time-varying, and the ultimate goal of wheel force measurement technology is to a...

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Abstract

The invention discloses a nonlinear decoupling method used for wheel force transducers. The method includes the following steps: 1, extending transducer input-output linear relation into a nonlinear form according to nonlinear characteristics of a wheel force transducer system and static calibration results; 2, deducing the matrix form of the input-output relation of each channel according to an established quadratic equation set; and 3, obtaining a decoupling matrix according to established matrix relation, and calculating real multi-dimensional wheel force/torque by using the matrix so thatmulti-dimensional signal decoupling can be realized. Through the method, the degree of coupling between measuring channels can be greatly reduced, and obtained force/torque signals can be maximumly approached to real ground-wheel force/torque signals.

Description

technical field [0001] The invention belongs to the technical field of automobile measurement and control, and in particular relates to a nonlinear decoupling method for a wheel force sensor. Background technique [0002] Due to the development of science and technology and the improvement of people's living standards, the automobile industry has increasingly integrated high-tech technologies in a country's industrial system, so the development level of the automobile industry reflects the integrity of the country's industrial system and the level of manufacturing to a certain extent. . China's auto industry has a bright future. In recent years, both auto production and consumption have shown a trend of rapid growth. Data show that the development of my country's automobile industry is gradually reaching its peak, and its total output ranks first in the world. Although my country has made remarkable achievements in terms of production and consumption, the core technology o...

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Application Information

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IPC IPC(8): G01L25/00
CPCG01L25/00
Inventor 冯李航董自强
Owner NANJING UNIV OF TECH
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