Aircraft Power System Power Supply Parameters Of The Test And Analysis

Aircraft electric power source system (AEPSS) is an important part of aircraft equipment. AEPSS includes AC-AEPSS and DC-AEPSS. The main research object of this paper is the parameters of AEPSS, and the main methods of treating with these parameters are numerical value analyse and signal process. According to GJB-181-86 and HB6448-86, the paper researches the theories and methods of analyzing steady and dynamic parameters. At the same time, a system of testing power parameters is offered.The system can test parameters of several kinds of aircrafts, such as Y7,Y8,J8 II ,JH7. The core unit is data acquisition card. The system can test steady parameters (voltage, current, frequency, powerfactor, etc.) and dynamic parameters (surge voltage, instantaneous frequency, etc.). For AC discrete digital signal, the linear fit method is applied to calculate the real zero in the periodic signal. Parabola interpolation is used to measure extremum and the discrete Fourier transform (DFT) is used for the measurement of voltage spectrum.An advanced software package is programmed on the basis of these methods and theories. In the end the author analyse the testing results and put forward some opinions on the problems.The programming results show that the algorithm, which is used in the measuring and controlling system of AEPSS, is effective and credible. All the tested parameters of AEPSS meet basic requirements and the measuring software performs greatly.