Automobile dynamic parameter measuring method based on double global positioning and inertia measurement

A dynamic parameter, global positioning technology, applied in measurement devices, radio wave measurement systems, satellite radio beacon positioning systems, etc., can solve the problems of low system information update rate, low long-term accuracy, and susceptibility to electromagnetic interference. Achieve the effect of making up for easy interference, small amount of calculation, and convenient calculation

Active Publication Date: 2012-08-01
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

[0003] IMU has the advantages of autonomy, strong anti-interference ability, and high short-term accuracy. The disadvantage is that the inherent drift error of the gyro makes the long-term accuracy not high; GPS has the advantages of all-weather, global and high-precision navigation or attitude measurement, and high long...

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  • Automobile dynamic parameter measuring method based on double global positioning and inertia measurement
  • Automobile dynamic parameter measuring method based on double global positioning and inertia measurement
  • Automobile dynamic parameter measuring method based on double global positioning and inertia measurement

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Embodiment Construction

[0025] The method for measuring vehicle dynamics parameters based on dual global positioning and inertial measurement proposed by the present invention comprises the following steps:

[0026] (1) Two global positioning modules are arranged horizontally on both sides of the top of the car body, and the two antennas of the global positioning module are respectively located at two points A and B, and the line between the two points A and B is the baseline, so that the baseline AB The line connecting the midpoint C and the center of mass of the car body under test is perpendicular to the ground, and the baseline AB is perpendicular to the longitudinal axis of the car body under test and symmetrical to the longitudinal axis;

[0027] (2) An inertial measurement module is arranged at the center of mass of the vehicle, and the inertial measurement module measures the lateral acceleration measurement value a of the vehicle body y ′, the longitudinal acceleration measurement value of t...

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Abstract

The invention relates to an automobile dynamic parameter measuring method based on double global positioning and inertia measurement, and belongs to the technical field of automobile parameter testing. Two global positioning modules and an inertia measurement module are arranged on an automobile body, and are used to together finish measurements of a side slip angle beta of the automobile body, aside acceleration ay 1 which is caused by a swerving of the automobile body, a heading angle psi of the automobile body, a side dip angle phi of the automobile body, a lateral acceleration ay1 at thecentroid position of the automobile body, a longitudinal acceleration aX at the centroid position of the automobile body, a yaw rate r at the centroid position of the automobile body and a side dip angle p at the centroid position of the automobile body. According to the automobile dynamic parameter measuring method based on the double global positioning and inertia measurement, measured dynamic parameters can be used as reference variables of a control of preventing automobile rollover, and the safety of automobile operation can be improved.

Description

technical field [0001] The invention relates to a method for measuring vehicle dynamics parameters based on dual global positioning and inertial measurement, and belongs to the technical field of vehicle parameter testing. Background technique [0002] The measurement and acquisition of vehicle motion state information is a basic problem in the research and design of vehicle handling stability, and it is also a necessary condition for realizing electronic control of vehicle stability. There is a need for a method and device for measuring important parameters of the vehicle's motion state that are fast, easy to operate, and have a wide range of applications with sufficient accuracy and confidence. The inertial measurement unit based on micromechanical sensor (hereinafter referred to as MEMS) technology is an inertial sensor used to measure the motion attitude of a moving body, and it is widely used in the fields of aviation, navigation and land navigation. [0003] IMU has t...

Claims

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Application Information

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IPC IPC(8): G01S19/49
Inventor 李亮徐英豪
Owner TSINGHUA UNIV
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