Abstract:

In the construction of hardware-in-the-loop (HWIL) simulation test system for radio frequency(RF)/infrared(IR) composite guidance, the design of turntables for RF/IR composite guidance is one of the key and difficult points. This article focuses on an RF/IR composite guidance turntable consisting of a five axis turntable and infrared composite equipment added to its two outer axes, and hopes to evaluate its impact on the accuracy of angle measurement error of the tested radar by electromagnetic simulation, to meet the demand for the design of RF/IR composite guidance turntable. For that, a hybrid full-wave electromagnetic (EM) modeling method is proposed based on the domain decomposition. The proposed modeling method achieves high confidence numerical simulation of the HWIL simulation scenario where the waves radiated from an antenna reach the tested radar through a heterogeneous composite guidance turntable. Then, with EM field distribution obtained based on modeling and simulation, a calculation method for radar angle measurement error is proposed via integrating the principles of electromagnetic reciprocity and monopulse amplitude-comparison angle measurement. Numerical simulation experiments including several typical heterogeneous composite guidance turntables is conducted to verify the accuracy and capability of the proposed method. It demonstrates the proposed method has potential to support the design of RF/IR composite guidance turntables, especially infrared composite equipment.

Key words: radio frequency(RF)/infrared(IR) composite, hardware-in-the-loop simulation, composite guidance turntable, domain decomposition method, monopulse amplitude-comparison angle measurement