Precise trimming device for the inner ring assembly of the mast-type photoelectric stabilized tracking platform

Abstract

The invention provides a precise trimming device for an inner ring assembly of a mast-type photoelectric stabilized tracking platform. The precise trimming device for the inner ring assembly of the mast-type photoelectric stabilized tracking platform comprises an outer frame, an inner frame, two pitch axis assemblies, two azimuth axis assemblies and two azimuth connecting axes. By adopting the precise trimming device, the inner ring assembly can rotate within 360 degrees in azimuth and pitch directions, trimming in consideration of both azimuth and pitch is realized, the goal of quick and accurate trimming is realized, and the influences of rotational inertia, unbalanced torque, shock absorber angular disturbance input and the like of the inner ring assembly on stability precision are reduced. The precise trimming device for the inner ring assembly of the mast-type photoelectric stabilized tracking platform has the advantages that the structural form is simple; compared with the traditional inner ring assembly trimming method, the trimming efficiency of the precise trimming device is high, the precision is high and the servo characteristic and the stability precision of the photoelectric stabilized tracking platform are improved. The precise trimming device is also applicable to other similar products which need precise trimming.

Description

technical field [0001] The invention relates to the technical field of photoelectric stable tracking, in particular to the trimming of the inner ring assembly of a photoelectric stable tracking platform with a two-axis four-frame structure, and in particular to a precision inner ring assembly of a photoelectric stable tracking platform installed on the top of a helicopter rotor mast. Balanced device. Background technique [0002] Two-axis four-frame is a common structural form of photoelectrically stabilized tracking platform (such as figure 1 As shown), it consists of two parts, the inner ring assembly and the outer ring assembly. The inner and outer ring assemblies are connected by a shock absorber. Both the inner and outer ring assemblies have two rotary axis systems of azimuth and pitch. There are two parts, the ring gimbal assembly and the optical bench assembly. The inner ring assembly is the core component of the photoelectric stabilized tracking platform, which pre...

AI Technical Summary

Problems solved by technology

[0005] The traditional trimming method of the inner ring assembly is only operated on the photoelectrically stabilized tracking platform. Since the inner ring gimbal assembly is fixedly connected to the outer ring assembly through its pitch axis stator, the inner ring gimbal assembly itself only has ±3° rotation degree of freedom, no azimuth rotation degree of freedom, so the trim of the inner ring gimbal assembly in the photoelectric stabilization tracking platform cannot take into account the azimuth trim

The optical bench assembly is installed on the rotor of the azimuth shaft system of the inner ring gimbal assembly, and it only rotates ±3° in the azimuth and pitch directions. The range is too small, and it is difficult to accurately judge the need to add counterweights in both the azimuth and pitch directions. position, in order to achieve 360° full-range trimming, the outer ring assembly must be turned over repeatedly to drive the inner ring assembly to rotate at a large angle, and the balance status of the optical bench assembly must be repeatedly observed, which takes time and effort. Even if the final optical bench assembly is well balanced, the inner ring is universal The imbalance of the frame assembly itself will still affect the overall trim accuracy of the inner ring assembly. The position of the center of gravity of the inner ring assembly cannot coincide with the intersection point of the azimuth and pitch rotation axes (that is, the elastic center of the vibration isolation system). Therefore, the current traditional trim The method has the following deficiencies: (1) The pitch and azimuth trims cannot be taken into account at the same time, and they interact with each other, the trimming process is repeated many times, and the efficiency is low; (2) The trimming accuracy is poor, which increases the difficulty of product stability and accuracy debugging, and restricts product performance improvement , cannot adapt to the vibration environment at the top of the helicopter rotor mast, which affects the stability accuracy of the mast-type photoelectric stabilized tracking platform

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