Method for detecting braking property of vehicle in road test based on improved Kalman filtering

A Kalman filtering and automobile braking technology, which is applied in vehicle testing, machine/structural component testing, measuring devices, etc., can solve problems such as high cost, difficult promotion, and low output frequency of real-time measurement

Inactive Publication Date: 2011-09-07
SOUTHEAST UNIV
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Problems solved by technology

The high-precision dual-frequency carrier phase difference GPS speed measurement trajectory method has the advantages of high precision, short test time, and all-weather measurement without occlusion (night, rainy days and slippery roads do not affect the measurement), but the output of real-time measurement Low frequency (up to 20Hz), high cost (currently about 300,000 RMB per set) and difficult to promote

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  • Method for detecting braking property of vehicle in road test based on improved Kalman filtering
  • Method for detecting braking property of vehicle in road test based on improved Kalman filtering
  • Method for detecting braking property of vehicle in road test based on improved Kalman filtering

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Embodiment Construction

[0084] The braking performance of a car is directly related to the driving safety of the car, and is the most important performance in the car safety performance. To this end, the country has formulated many standards to test the braking performance of automobiles, such as GB 7258-2004 "Safety Technical Conditions for Motor Vehicle Operation", GB / T 12676-1999 "Automotive Braking System Structure, Performance and Test Methods" and GB / T 13594-2003 "Motor Vehicle and Trailer Anti-lock Braking Performance and Test Methods" and other national standards have made clear provisions for the inspection and evaluation of the braking performance of automobiles. Based on this, it can be seen that the automobile road test braking performance inspection mainly has the following characteristics:

[0085] (1) The road surface of the automobile brake test is smooth and small. Automobile road braking performance inspection should be carried out on a flat road surface (gradient is usually not grea...

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Abstract

The invention discloses a method for detecting braking property of a vehicle in a road test based on improved Kalman filtering, which comprises the following steps: on the basis of referring a 'current' statistical model of an engine driven carrier in the navigation field, establishing a system motion model in the vehicle braking process; according to the Kalman filtering theory, using a speed and an azimuth angle outputted by a single-frequency carrier phase single-point GPS (global position system) receiver as the system observed volumes; and high frequently and precisely calculating a plane motion coordinate and the speed in the vehicle braking process, by utilizing the improved Kalman filtering recursive algorithm, thereby calculating and confirming a vehicle braking distance and a mean fully developed deceleration MFDD.

Description

Technical field [0001] The invention relates to the measurement of motion parameters and distances when a car is performing a road braking test, in particular to a method for detecting braking performance of a car road test based on an improved Kalman filter, and its purpose is to determine the speed and motion trajectory during the braking process of the car Parameters such as (coordinates) and distance to evaluate the braking performance of automobiles belong to the technical field of automobile road testing and testing. Background technique [0002] With the rapid development of the transportation and automobile industry, the number of highway mileage and the number of cars around the world is increasing rapidly. Road traffic accidents have gradually become a prominent problem in today’s society. Timely detection and evaluation of the safety performance of cars has become a guarantee for road traffic. The necessary means of safety, and the braking performance is the most impor...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007
Inventor 李旭陈伟宋翔
Owner SOUTHEAST UNIV
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