A Strapdown Optical Seeker Decoupling Method Considering Measurement Delay

Abstract

A strapdown optical seeker decoupling method considering measurement delay relates to the field of aircraft. The invention aims to solve the problem that the guidance information interferes greatly under the condition that the time delay of the information measured by the strapdown optical seeker is different from the time delay of the information measured by the aircraft attitude sensor. The invention measures the delay time of the signal output of the strapdown optical seeker; through the angular vibration test of the angular rate gyroscope, the output delay time of the angular rate gyroscope is measured; and then the delay time of the output information of the strapdown optical seeker and the output of the angular rate gyroscope are obtained The difference of information delay time, and according to the discretization sampling period of the angular rate gyroscope, determine the number of adjustments of the attitude angle information calculated by the angular rate gyroscope, and use the information output by the strapdown optical seeker and the elapsed time of the angular rate gyroscope solution The attitude angle information after the adjustment of the number of beats is solved to obtain the line-of-sight angle between the aircraft and the target that eliminates the measurement delay, and completes the decoupling of the strapdown optical seeker.

Description

technical field [0001] The invention belongs to the field of aircraft, and in particular relates to the measurement of strapdown optical seeker information during aircraft flight. Background technique [0002] During the flight of the aircraft, there is a problem of measurement delay in the measurement information of the strapdown optical seeker; at the same time, there is also a measurement delay in the measurement information of the aircraft attitude sensor. The state of different measurement delays of the two information will increase the interference to the formation of aircraft control commands. , thus affecting the flight trajectory of the aircraft, causing the aircraft to fail to complete the flight mission according to the theoretically set trajectory, and in severe cases, it will cause the failure of the flight test. [0003] In order to reduce the impact of the difference in measurement delay of the two channels of information on the flight trajectory of the aircra...

Images