A rotary dual-channel roll and pitch tracking scheme is proposed, and a dual-channel rotation control algorithm is designed to solve the problem of detector front and phase plane rotation, expand the field of view, and improve detection efficiency. The light and miniaturized platform design in space improves the control speed and accuracy. In the strong maneuvering state of the terminal target, the dual-channel infrared tracking reduces the amount of target misses and improves the performance of the control system to precisely hit the target. In this paper, the research results obtained are expounded from the two aspects of the rotary dual-channel system tracking principle and the rotary dual-channel tracking control method. Firstly, the design of the dual-channel rotation control algorithm is introduced; secondly, the dual-channel rotation tracking loop is designed; finally, the research results are verified by experiments, which illustrate the advantages of the rotation-based tracking in fast response, dual-channel interaction and precise guidance.
The sources of different spurious radiation in infrared optical system are analyzed, and the measures to suppress the spurious radiation are listed. Taking the infrared optical system of a detector as an example, the stray radiation of the infrared optical system is suppressed by setting the lyot stop. The optical and mechanical structure model of the infrared optical system was established, and the Monte Carlo method in LightTools software was used for ray tracing analysis. The illuminance of the image plane of the detector after adding lyot stop was obtained, and the point source transmittance (PST) and veiling glare index (V) of the infrared system were calculated, and the effectiveness of the suppression effect was evaluated. At the same time, the background heat radiation of the internal optical and mechanical structure of the infrared optical system is simulated and analyzed. The comprehensive consideration ensures that the imaging quality of the infrared optical system is not affected.
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