Electrostrictive fretting structure and control method for improving tracking accuracy of two-axis turntable

Abstract

The invention discloses an electrostrictive micromotion structure for improving the two-axis rotating table tracking precision and a control method thereof. The electrostrictive micromotion structure comprises a pitching base and a rotary base, wherein a support shaft is arranged between the pitching base and the rotary base; one end of the support shaft is fixed in the center position of the pitching base; the other end of the support shaft is provided with a rolling bearing; the rolling bearing is arranged in the center position of the rotary base; a pitching electrostrictive element used for controlling the pitching base to perform pitching regulation is arranged on the pitching base; a rotary electrostrictive element used for controlling the rotary base to perform rotation around the center is arranged on the rotary base. The electrostrictive micromotion structure has the advantages that the structure is simple; the method is simple; the implementation is easy; the precise regulation on the rotary angle and the pitching angle of the two-axis tracking rotating table can be realized; the view axis precision can reach the angle second range; in addition, the precision regulation is controllable.

Description

technical field [0001] The invention belongs to the technical field of two-axis tracking turntables, and in particular relates to an electrostrictive micro-motion structure and a control method for improving the tracking accuracy of two-axis turntables. Background technique [0002] With the increasingly fierce competition for space resources, it is key to compete for space information rights. It is of great strategic significance to monitor space targets and determine the latest distribution of space targets. The two-axis tracking turntable is mounted on different aerospace carriers to form a space Based on the two-axis tracking turntable, it is an effective means to carry out space optical communication, space target monitoring, precise ground observation, scientific target detection, and space weapon aiming system. The accuracy of the two-axis tracking turntable directly affects the realization of system functions. . The rotating pair is the main kinematic pair in the tw...

AI Technical Summary

Problems solved by technology

The specific measures of the former cover new lubricants, self-lubricating coatings, high-hard coatings, etc. Some researchers introduced MoS 2 , WC-12Co and other coatings to achieve the purpose of bearing friction reduction, the limitation is that the operation is difficult and the accuracy is difficult to greatly improve

The specific measures of the latter include high-precision controllers, new control algorithms, friction compensation control, etc. Some researchers have proposed self-turning controllers, sliding mode control, and adaptive compensation methods based on LuGre friction models to improve system accuracy. Limitations The improvement in control is ultimately limited by the friction of mechanical parts, and it is difficult to achieve the goal of improving accuracy in essence.

Images