Method and system for measuring multi-component force and moment

Abstract

The present invention discloses a multi-component force and moment measurement method and system. The method comprises: obtaining an acceleration sensor measured value; obtaining a first acceleration value according to the acceleration sensor measured value and the inherent frequency and the damping ratio of the acceleration sensor; determining an inertia force vector according to the first acceleration vector; obtaining force vector applied to a rigid body by a force sensor; and determining the multi-component force and moment forced by the rigid body according to the inertia force vector and the force vector applied to the rigid body by the force sensor, wherein the multi-component force and the moment are force vectors of the rigid body except the force applied by the sensor. The multi-component force and moment measurement method and system are employed to calculate the damping of the acceleration sensor and consider the output deviation problem caused by the damping so as to substantially improve the measurement precision and reduce the corresponding manpower and material cost.

Description

technical field [0001] The invention relates to the field of mechanical measurement, in particular to a method and system for measuring multi-component force and torque. Background technique [0002] In some scientific research or production activities, such as the high angle of attack pitching dynamic aerodynamic characteristics experiment in the wind tunnel experiment, the rapid pull-up aerodynamic characteristics experiment, the rock characteristics experiment, the wind tunnel start-up impact load experiment, etc., there are multiple points for measuring rapid changes Force and torque requirements. The measurement process of some types of force sensors requires a certain displacement or angular displacement of the measuring end relative to the fixed end, and there are large inertial parts following the movement at the measuring end, and the sensor damping is small, resulting in low natural frequency and small damping ratio of the system, which cannot Produces accurate ou...

AI Technical Summary

Problems solved by technology

To ensure engineering acceptable sensitivity, the balance element must generate sufficient strain, which limits the stiffness of the force sensor and makes it difficult for the system to obtain high natural frequencies

In addition, the balance structure itself is difficult to set up a damping mechanism, resulting in a system damping ratio that is too low

Therefore, relying on the balance measurement system itself is difficult to accurately measure rapidly changing force and torque inputs

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