Active Vibration Isolation Method for Angular Vibration of Optical System of Strapdown Seeker

Abstract

The invention discloses a method for actively isolating angular vibration of an optical system of a full-strapdown seeker, and relates to the field of vibration isolation technologies for optical systems of full-strapdown seekers. The method has the advantages that the optical system is connected with a guided missile body by a spherical hinge, the mass center of the optical system is coincided with the center of the spherical hinge by the aid of a design, and accordingly the coupled angular vibration is prevented from being led into structural linear vibration; a Sky-Hook damping model is constructed, so that angular vibration response and angular vibration excitation are integrated into the classic Sky-Hook model, and proper spring stiffness and a proper damping value can be selected according to the requirement of the system on a vibration isolation effect; the angular vibration isolation can be actively controlled, so that the guided missile body is excited by the angular vibration, the angular vibration response of the optical system is good in attitude reproducibility in a maneuvering frequency band of a guided missile, and the vibration can be effectively isolated in a noise and vibration frequency band.

Description

technical field [0001] The invention relates to the technical field of vibration isolation of the optical system of a strapdown seeker, in particular to an active vibration isolation method for the angular vibration of the optical system of a strapdown seeker based on a Sky-Hook damping model. Background technique [0002] There are many traditional seeker platform stabilization methods, including dynamic gyro stabilization, integral gyro stabilization, and rate gyro stabilization. The most commonly used is the seeker stabilized platform with a rate gyro. The angular rate sensor installed on the seeker stabilized platform directly transmits the signal to the torque motor to provide stability compensation. With the development of high-precision inertial integrated navigation technology and the progress of high-performance microprocessors, strapdown seeker guidance and its digital control technology have become an important research direction for small, fast and low-cost seeke...

AI Technical Summary

Problems solved by technology

[0004] At present, the vibration isolation design of the full strapdown seeker mostly focuses on the vibration isolation of the linear vibration along the optical axis (also called longitudinal vibration) through the passive vibration isolation strategy, and a small number of scholars also focus on the vibration perpendicular to the optical axis (also known as longitudinal vibration). known as lateral vibration) for vibration isolation design, but less research on diagonal vibration isolation design

In addition, the imperfect isolation design of lateral vibration and longitudinal vibration often introduces coupled angular vibration, which adversely affects the strike accuracy of missiles

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