Small stabilized platform friction torque testing method based on force balance

Abstract

The invention relates to a small stabilized platform friction torque testing method based on force balance, a control device composed of a motor, an encoder, a reduction gearbox and a torque sensor isadded on a stabilized platform frame to provide accurate and uniform angular rotation, and the torque sensor is connected with the platform frame and the reduction gearbox through a coupling to drivethe frame to rotate at a uniform speed. The moment transmitted by the moment sensor and the friction moment of the stabilized platform frame keep moment balance. Friction torques at different speedsand different positions are obtained by collecting information of an encoder, a torque sensor and an angle sensor, so that consistency of optical machine installation and adjustment is evaluated, compensation is performed in a stability control algorithm, the anti-interference capability of the photoelectric stabilized platform is enhanced, and the accuracy of optical axis pointing is improved.

Description

technical field [0001] The invention relates to a test method for friction torque of a small stable platform based on force balance, and belongs to the technical field of photoelectric detection. Background technique [0002] The main task of the airborne optoelectronic stabilization platform is to isolate the disturbance of the carrier base and ensure the stable orientation of the optical axis in the inertial space. However, the angular velocity and angular acceleration of the carrier base will be coupled to the optical axis through the relative relationship between the coordinate systems of the frame axes and the geometric constraints and frictional constraints between the axis systems. For a small photoelectric stabilized platform with a ratio of friction torque to moment of inertia greater than 20rad / s2, the friction torque will increase sharply relative to the platform inertia, and the coupling of friction constraints is particularly obvious, which has a crucial impact ...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem that the speed is not uniform when driven by the self-owned control device of the frame of the airborne photoelectric stabilization platform, and the inertia moment of the frame itself interferes with the measurement, the present invention proposes A test method for friction torque of a small stable platform based on force balance, which can effectively measure and describe the friction torque of the universal frame of the stable platform, and provide a basis for the optimization of the optical-mechanical adjustment method and the stability control algorithm, thereby improving the airborne optoelectronic stable platform control performance

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