The paper describes the influence of power electronics, energy processing, and emergency radio systems (ERS) immunity testing on onboard aircraft equipment and ground stations providing air traffic services. The implementation of next-generation power electronics introduces potential hazards for the safety and reliability of aircraft systems, especially the interferences from power electronics with high-power processing. The paper focuses on clearly identifying, experimentally verifying, and quantifiably measuring the effects of power electronics processing using switching modes versus the electromagnetic compatibility (EMC) of emergency radio systems with electromagnetic interference (EMI). EMI can be very critical when switching power radios utilize backup receivers, which are used as aircraft backup systems or airport last-resort systems. The switching power electronics process produces interfering electromagnetic energy to create problems with onboard aircraft radios or instrument landing system (ILS) avionics services. Analyses demonstrate significant threats and risks resulting from interferences between radio and power electronics in airborne systems. Results demonstrate the impact of interferences on intermediate-frequency processing, namely, for very high frequency (VHF) radios. The paper also describes the methodology of testing radio immunity against both weak and strong signals in accordance with recent aviation standards and guidance for military radio communication systems in the VHF band.
Recent technology enables us to design sophisticated navigation systems and improve the capability of positioning and guidance of aircraft. This development can satisfy increasing demands on the air space capacity and on the economy of the commercial flights. Finally, the influence on the environment is diminished when the time of flight is decreasing, which can be achieved also due to a better navigation solution.This paper introduces the design of the navigation receiver, which benefits from the advanced FPGA technology. The developed receiver consists of the analog RF frontend followed by the IF conversion, ADC, and the DSP part. It possesses the capability to process up to 10 navigation sources together. Then, the navigation solution can profit from the higher number of independently measured data to achieve precise and reliable estimation of an aircraft position.Secondly, this paper presents the idea and experimental solution for an approach-to-landing navigation system. The designed system is based on the TDOA positioning methods accompanied with an ILS transmitting channel, which distributes lateral and vertical trajectory error corrections. This system is one of the possible navigation data source for the previously described multiple source navigation signal receiver.
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