Torque calibration and measurement device based on zero-stiffness flexible support

Abstract

The invention relates to a torque calibration and measurement device based on a zero-stiffness flexible support. The lower end of the flexible support is fixedly connected with a pedestal, the upper end is fixedly connected with a standard torque beam, a rotating center ''O'' of the flexible support coincides with a central axis ''Y'' of the standard torque beam, and coincides with a mass center of the standard torque beam; a laser displacement sensor is connected to a signal control measurement circuit; the signal control measurement circuit drives an electromagnetic torque device to act so as to level the standard torque beam; and an electric signal output by the electromagnetic torque device is acquired through the signal control measurement circuit, and real-time torque load is calculated according to the acquired electric signal. The torque calibration and measurement device adopts the ''X''-shaped flexible support to serve as a rotating and supporting component of the standard torque beam to bear changing torque values, is combined with the standard torque beam and the flexible support through a negative-stiffness adjusting assembly, and achieves torque calibration and measurement of the flexible support representing zero-stiffness characteristic, thereby increasing sensibility of torque calibration and measurement, especially torque calibration and measurement with tiny measuring range.

Description

technical field [0001] The invention relates to a torque calibration measurement device, in particular to a torque calibration measurement device based on a zero-rigidity flexible support. Background technique [0002] The flexible support uses the elastic deformation of the material itself to transmit motion, force or energy. It has the advantages of no friction, no gap, high sensitivity, high resolution, good dynamic performance and integrated processing. It is widely used in precision positioning, MEMS processing, Aeronautics and navigation systems and other fields. [0003] Compared with the traditional rigid structure, the elastic deformation during the action of the flexible support produces positive stiffness in the functional direction, which to a certain extent hinders the movement of the system and reduces the efficiency of energy transfer, which has become a shackle for the expansion of its application range. In order to overcome the adverse effects brought by th...

AI Technical Summary

Problems solved by technology

However, since the flexible support uses the elastic deformation of the elastic body to achieve movement, when the flexible support is bent and deformed by the external torque, it will inevitably generate a restoring moment in the opposite direction, thereby hindering the further movement of the flexible support. The drive unit of the system needs to provide a large output torque to drive and maintain the movement of the flexible support

Although the torsional stiffness in the direction of movement of the flexible support can be reduced by reducing the thickness of the thin neck of the flexible support, this method can only reduce the torsional angular stiffness to a limited extent, and cannot achieve the ideal zero-stiffness characteristic, and cannot maximize Sensitivity of the system or device, and will affect the functional stiffness in other directions at the same time

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