Testing system for integral vehicle running station

Abstract

The invention relates to an automobile movement state measuring system for automobile movement safety evaluation field test, providing a complete automobile movement state measuring system based on RTKDGPS and high accuracy IMU for automobile performance field test, and the system comprises high accuracy GPS receiver, high accuracy inertia measuring unit (IMU), embedded special processing system and corresponding interfaces, where the original data collected by the high accuracy GPS receiver and IMU are together transmitted through the respective interfaces into the embedded special processing system, and the embedded special processing system runs GPS data coordinate transform, preprocessing module, inertia navigating system (INS) algorithm module, improved Kalman filter fusion algorithm software and real-timely records and displays and supplies high accuracy automobile movement states including acceleration, angular speed, automobile speed, displacement, and posture through interface to upper computer.

Description

technical field [0001] The invention relates to an automobile movement state measurement system used for field tests of automobile movement safety performance evaluation. Background technique [0002] Automobile test is an extremely important method to help us understand the nature and laws of various phenomena in actual use of automobiles, discuss and solve existing problems, verify the effect and degree of problem solving, and promote its technological progress. Performance, an important means to improve product quality and market competitiveness. [0003] Automobile field road test concentrates on the typical road conditions of various road conditions in the actual use of automobiles. It is mutually verified, interdependent and complementary with the virtual test methods such as automobile indoor tests and driving simulators popular this year. One of the most important means to comprehensively test and evaluate the safety performance and reliability of motor sports. [...

AI Technical Summary

Problems solved by technology

In the domestic field tests of real vehicles in the 1950s and 1960s, the residual trace method was usually used to measure the vehicle trajectory, but it had the disadvantages of long residual measurement time, difficulty in judging multiple test tracks, and inability to use on wet roads.

Finally, the method of testing the trajectory of the center of gravity of the vehicle is adopted, that is, the angular displacement (or angular rate) and the component of the velocity or acceleration in the vehicle coordinate system are measured by the gyroscope and the pentameter, and the velocity and the trajectory of the center of gravity of the vehicle are obtained through integration. This method has shortcomings such as large measurement errors and poor test repeatability due to the accumulation of errors such as zero drift due to the use of integral algorithms.

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