Force bearing point position calibration method for weighing sensor of multi-point mass center measurement equipment

Abstract

The invention relates to a force bearing point position calibration method for a weighing sensor of multi-point mass center measurement equipment. The method comprises the steps of building a measurement reference coordinate system of the mass center measurement equipment by coordinate measurement equipment; respectively arranging standard pieces at a plurality of positions, measuring mass centerpositions of the standard pieces respectively by the coordinate measurement equipment when the standard pieces are arranged at different positions, and recording an output value of each weighing sensor when the standard pieces are arranged at different positions; building a static moment balance equation comprising force bearing point coordinate of each weighing sensor; and solving the static moment balance equation to obtain the force bearing point coordinate of each weighing sensor of the mass center measurement equipment. By the method, a measurement error caused by deviation of the force bearing point of the weighing sensor relative to an actual-measurement position before unloading during product loading of the mass center measurement equipment can be corrected, and the measurement accuracy of the multi-point mass center measurement equipment is remarkably improved.

Description

technical field [0001] The invention relates to the technical field of mass characteristic testing of large-sized objects, in particular to a method for accurately calibrating the position of a load cell stress point for multi-point barycenter measurement, and is especially suitable for high-precision testing of the barycenter of an aircraft. Background technique [0002] The center of mass is of great significance to the motion analysis, attitude control and verification of the reasonableness of the internal load structure layout of aerospace vehicles, ships, automobiles, motors and other products, so accurate testing is required. Commonly used centroid measurement methods include multi-point weighing method, unbalanced moment method, suspended wire torsion method, etc. Among them, the unbalanced moment method has higher measurement accuracy, but when measuring the three-dimensional centroid of the product, it is necessary to change the attitude of the tested part three time...

AI Technical Summary

Problems solved by technology

This offset makes the measurement error of the center of mass significantly increase, which cannot meet the measurement requirements of the center of mass of aircraft and other equipment

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