Method for capturing object by using last pulse policy of laser seeker of unmanned aerial vehicle

Abstract

The invention discloses a method for capturing an object by using a last pulse policy of a laser seeker of an unmanned aerial vehicle. According to the method disclosed by the invention, the last pulse policy is adopted, by means of effectively identifying a last pulse of an echo in a single laser period and filtering out atmosphere back scattering echo pulses, an echo signal of the object can be accurately captured within a signal gating time of a seeker detector, so that a laser semi-active seeker of an airborne guided missile of the unmanned aerial vehicle can filter out atmosphere back scattering echo signals and repeater inductive signals, can identify a real object echo pulse signal, in this way, disadvantages of laser guidance can be overcome, capturing, tracking and locking precisions for the object are greatly improved; according to the method disclosed by the invention, the last pulse policy is adopted, two sampling holders are used to perform alternative sampling and to keep gating, pulses in gates of a single laser periodic wave are all sampled, back scattering pulses or induced signal pulses which arrive before an object echo are filtered out, and the last pulse, namely the object pulse, is preserved, in this way, a signal-to-noise ratio of the object echo signal is greatly increased, and a striking effect of the airborne guided missile of the unmanned aerial vehicle under severe weather conditions is improved.

Description

technical field [0001] The invention relates to a method for capturing a target using the last pulse strategy of a laser seeker of an unmanned aerial vehicle, which filters backscattered pulses in the range gate and identifies the last pulse, that is, the target pulse, so as to ensure the accuracy of the seeker to the target. Effective locking, mainly used on the laser seeker of UAV airborne missiles. Background technique [0002] When the UAV launches an airborne laser-guided missile, it first searches, finds and locks the target through the airborne photoelectric reconnaissance load, and then uses the airborne laser irradiator to emit a laser beam to the target, and the laser seeker of the UAV airborne missile passes through the Receive the laser echo diffusely reflected by the target, and the laser signal is imaged on the four-quadrant detector through the seeker optical system. By processing the four output signals of the detector, the angular error signal between the se...

AI Technical Summary

Problems solved by technology

[0004] However, the main disadvantage of the laser seeker is that it is greatly affected by the atmospheric environment. The backscattered echo signal caused by atmospheric molecules and suspended matter in the atmosphere is mixed with the diffuse reflection echo signal of the target, which is easy to interfere with laser detection. The target signal is captured by the seeker, so that the seeker loses the target or tracks the wrong target

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