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Distortion and pulsation signal testing method for direct-current 270V power supply system of airplane

A technology for power supply system and signal testing, which can be used in measuring electrical variables, testing electrical devices in transportation, measuring electricity, etc., and can solve problems such as inaccurate measurements

Active Publication Date: 2021-05-28
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of inaccurate measurement in the prior art, and to provide a method for testing the distortion and pulse signal of the DC 270V power supply system of an aircraft; the method It is mainly used to realize the accurate measurement of the distortion and pulsation signal of the aircraft DC 270V power supply system, trace the distortion spectrum and the amplitude of the pulsation voltage in the characteristic parameters of the aircraft DC 270V power supply to the basic quantity

Method used

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  • Distortion and pulsation signal testing method for direct-current 270V power supply system of airplane
  • Distortion and pulsation signal testing method for direct-current 270V power supply system of airplane
  • Distortion and pulsation signal testing method for direct-current 270V power supply system of airplane

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Embodiment 1

[0030] The 270V DC power supply adaptability test equipment for airborne products is an important test device for evaluating the quality of airborne electrical equipment adapting to aircraft power supply. Its main function is to simulate the working state of the aircraft power supply under various extreme conditions, so as to test the ability of the onboard electrical equipment to adapt to the aircraft power supply. The calibration device for this equipment needs to calibrate and trace the various analog power signals generated by it, which involves accurate measurement of the 270V DC distortion and pulsating signals contained in these signals.

[0031] Such as Figure 4 As shown, the distortion and pulsation measurement part of the calibration device is composed of a high stable DC reference signal source, a subtraction circuit and an A / D converter.

[0032] The high stable DC reference signal source is composed of a voltage reference and a composite linear amplifier circuit...

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Abstract

The invention relates to a distortion and pulsation signal testing method for a direct-current 270V power supply system of an airplane, and belongs to the technical field of airplane power supply characteristic testing and calibration. The method is mainly used for realizing accurate measurement of distortion and pulsation signals of the airplane DC 270V power supply system, and tracing the distortion frequency spectrum and the pulsation voltage amplitude in characteristic parameters of the airplane DC 270V power supply to basic quantities. According to the invention, distortion and pulsation signals which are measured and superposed on direct current 270V and high-stability direct current 270V reference signals are subtracted by a subtraction circuit formed by a high-voltage linear amplifier, so that smaller distortion and pulsation signals are obtained; the signal meets the input range of the A / D converter with positive and negative signal measurement; meanwhile, by calibrating high-stability direct-current reference signals and amplitude-frequency characteristics of a subtraction circuit, distortion and pulse values obtained through measurement are compensated and corrected.

Description

technical field [0001] The invention relates to a method for testing distortion and pulsation signals of an aircraft DC 270V power supply system, belonging to the technical field of aircraft power supply characteristic testing and calibration. Background technique [0002] The aircraft 270V DC power supply system is the main power supply system of the new generation of fighter jets, and will largely replace the existing 115V / 400Hz AC power supply system. Its characteristics are: the structure of the brushless DC generator is simple, the operation is reliable, and the parallel connection is convenient; the internal loss of the main power supply and the secondary power supply is small, and the efficiency is high; the parallel connection is realized through the reverse current protection diode, and the failure of the main power supply will not cause power interruption; the quality of the power grid Light; 270V DC is less harmful to the human body than 115V / 400Hz AC; it can real...

Claims

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Application Information

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IPC IPC(8): G01R19/25G01R31/00
CPCG01R19/25G01R31/008
Inventor 侯毅王文健程勤柴艳丽
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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