Method for estimating acceleration of center of mass of rigid body

Abstract

The invention discloses a rigid mass center acceleration estimation method, and belongs to the technical field of automobile dynamics analysis. The estimation method comprises the following steps: S1, selecting N first mark points on a rigid body to obtain corresponding coordinates and accelerations; s2, the coordinates and the acceleration of the N first mark points are substituted into an acceleration equation, and the centroid acceleration of the rigid body is estimated; s3, M second mark points are selected on the rigid body, and corresponding coordinates and actual acceleration are obtained; according to the centroid acceleration estimated in the step S2, the coordinates of the M second mark points are substituted into the acceleration equation, and the estimated acceleration is obtained; s4, comparing the estimated acceleration and the actual acceleration of each second mark point, and judging whether the error of the two is within an allowable range; and S5, if the errors of the M second mark points are all in an allowable range, determining that the centroid acceleration estimation method is reliable. The estimation method provided by the invention can simply and quickly obtain the centroid acceleration of the rigid body, and has important engineering value.

Description

technical field [0001] The invention relates to the technical field of vehicle dynamics analysis, in particular to a method for estimating the acceleration of the center of mass of a rigid body. Background technique [0002] With the increasingly fierce competition in the automotive industry, users have higher and higher requirements for the dynamics of the car; since the position and acceleration of the center of mass of the vehicle are very important to the handling stability and comfort of the vehicle, whether it is related to vehicle dynamics In the simulation process or the actual test process, it is of great significance to obtain the accurate centroid position and centroid acceleration. [0003] However, due to the irregular shape of the rigid body or the uneven performance, the position of the center of mass of the rigid body is often undetermined, or although the position of the center of mass can be determined, the acceleration sensor of the center of mass cannot b...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for estimating the acceleration of the center of mass of a rigid body, which can accurately obtain the acceleration of the center of mass of the rigid body, and solve the problem that the physical motion characteristics of the center of mass cannot be directly measured in actual engineering

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