A high-precision limited-rotation-angle shafting device

Abstract

The invention discloses a high-accuracy limited-angle shaft device, and relates to the field of a sweeping mechanism of a space remote sensing instrument. The high-accuracy limited-angle shaft device comprises a high-accuracy rotary transformer, a rotary positioning jack screw, a rotary installation sleeve, a shaft feedback rotation shaft, a fixed frame or base, pivot installation seats, lug press blocks, flexible pivot shafts, a load, a shaft transmission rotation shaft, a rotation shaft limiting jack screw, a motor rotor and a motor stator. In the high-accuracy limited-angel shaft device, the flexible pivot shafts are used as a support mode, no friction force or friction torque is generated in the support mode, no any lubrication mode is not needed, and a shaft torsional resistance torque is only related to torsional rigidity and rotational angles of the pivot shafts and is free from the influence of an environmental factor and the like; a shaft adopts a voice coil motor as a driving element for limited-angle reciprocating motion, and a direction changing device is not needed; and the high-accuracy limited-angle shaft device has the advantages of simplicity in structure, high reliability, large acceleration speed and fast response, and is particularly suitable for a short-stroke closed-loop servo control system.

Description

technical field [0001] The invention relates to the field of a sweeping mechanism of an aerospace remote sensing instrument, in particular to a high-precision limited-rotation-angle shafting device. Background technique [0002] With the rapid development of aerospace technology and the continuous improvement of application requirements, the requirements for the tracking (scanning) accuracy of space remote sensing monitoring instruments are getting higher and higher, and the basic way to improve the accuracy is to improve the manufacturing accuracy of the shafting structure and improve the drive fineness of the control system. sub-accuracy. Structural machining and assembly is mainly to ensure the positional accuracy of the shafting support components. For example, when the span of the shafting is 200mm-300mm, the coaxial precision of machining can be optimized to an error of 0.005mm. According to the current level of machining and, It has been difficult to improve; the sub...

AI Technical Summary

Problems solved by technology

Structural machining and assembly is mainly to ensure the positional accuracy of the shafting support components. For example, when the span of the shafting is 200mm-300mm, the coaxial precision of machining can be optimized to an error of 0.005mm. According to the current level of machining and, It has been difficult to improve; the subdivision accuracy of the control system drive can be improved, but at the cost of a large amount of calculation and high power consumption, which is contrary to the design criteria of light weight, compact and low power consumption of aerospace products

[0003] The traditional rotating shaft design is generally supported by rolling bearings, and the shafting is driven by stepping motors or DC torque motors; however, rolling bearings are generally suitable for working conditions where the shafting rotates throughout the entire circle, or the rolling elements in the bearing rotate evenly throughout the entire circle. When the oscillating speed of the shaft system is low and the working range of the shaft system is small, if rolling bearings are used, it is easy to cause creeping phenomenon, and the life of the rolling elements will be seriously affected under the long-term non-full cycle stress condition

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