Self tracking method for spacecraft dynamic target by spherical phased array antenna

Abstract

The invention provides a self tracking method for a spacecraft dynamic target by a spherical phased array antenna, which aims at providing a simple and reliable tracking method with little hardware resource consumption. The technical scheme comprises steps: radio frequency signals received by four array antenna links form beam forming signals through a DBF weighting module, a difference beam forming module transmits sum / difference beam signals to a rear-end baseband angle error demodulation module for being processed, azimuth error voltage and pitching error voltage are solved, the azimuth error voltage and the pitching error voltage are transmitted to a waveform control computer for being processed, the waveform control computer uses waveform control software to estimate a target incomingwave direction, a two-order digital tracking loop is used to enable a tracking intermediate variable V(Z) and a multi-beam lectronic scanning gain coefficient K0 to be multiplied, a new beam direction theta(Z) is obtained, and finally, the beam direction is updated through the waveform control software of the waveform control computer, after deviation is corrected, the real-time target position is transmitted to a beam forming unit, and self tracking on the dynamic target is completed.

Description

technical field [0001] The invention relates to a method for self-tracking a dynamic target of a spacecraft by a spherical phased array antenna adopting digital beam formation of a measurement and control system in the field of aerospace measurement and control. Background technique [0002] In the multi-beam measurement and control system, the beam control system scans each feed source of the antenna array by scanning method, finds the maximum value of the signal, obtains the deviation according to the position of the maximum value, and then guides the antenna control system to align with the target main beam . This working system leads to three shortcomings in the guiding data. The first is the step jump of the guiding data. Since the beam control system finds the position of the feed source that receives the strongest signal, it is limited by the width of the feed source itself and the installation between the feed sources. Due to the influence of the gap, there must be ...

AI Technical Summary

Problems solved by technology

Due to the simultaneous existence of these three shortcomings, the use of the traditional PID control algorithm will inevitably lead to the extension of the antenna oscillation and convergence adjustment time, and it is impossible to capture the high-speed moving target.

Especially when the target is over the top, the moving speed of the target reaches the maximum value, and even exceeds the allowable maximum value of the relative speed movement, so it is impossible to complete the target capture

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