Omnidirectional high-accuracy spatial direction fine tuning device

Abstract

An omnidirectional high-accuracy spatial direction fine tuning device is disclosed, which has a soleplate (3) and a cylindrical bracket (2). The bracket (2) is inside provided with three piezoelectric ceramic drivers (1) which are radially evenly distributed in a radial direction. One end of the piezoelectric ceramic driver (1) is fixedly connected to the bottom of the bracket (2) while the other end thereof is hinged with the soleplate (3). The three piezoelectric ceramic drivers (1) are hinged with the soleplate (3) via a ball (11) and a ball socket (41), respectively. Moreover, the cylindrical surface of the bracket (2) is provided with a helical groove (21). On account of the helix-shaped groove, namely the helical groove, arranged on the bracket in the invention, the bracket is endowed with elastic deformation and resetting ability; by respectively driving the three piezoelectric ceramic drivers to perform straight-line displacement, the soleplate, namely a normal line of an outer end face of a carrying platform, can be accurately controlled to swing towards any spatial orientation, thus realizing accurate fine tuning direction.

Description

technical field

[0001] The invention relates to a space pointing mechanism, in particular to an all-round high-precision space pointing fine-tuning device for the mechanism. Background technique

[0002] Achieving pointing motion in space is a basic requirement for various devices in aerospace engineering applications. The traditional two-axis orthogonal turntable space pointing device has low positioning and pointing accuracy due to the comprehensive influence of design calculation errors, machining errors, assembly errors, random errors, and fit clearances. In the field of optical communication, the antenna drive mechanism and the attitude control mechanism of the missile seeker require that the platform on which it is carried can achieve precise pointing and positioning in the omni-directional space on the order of milliradians. Obviously, it is difficult to meet the requirements of use by adopting the traditional pointing mechanism. As a solution, a high-precision fine...

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