Method and device for detecting fault of power supply system of spacecraft

A technology for power supply system and fault detection, applied in power supply testing, measuring devices, instruments, etc., can solve problems such as inaccurate thresholds, difficult to determine boundary conditions, and threshold selection limitations.

Inactive Publication Date: 2015-07-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS +1
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Problems solved by technology

However, the length of the actual processed signal is limited, so the selection of the threshold is limited, the threshold selected for finite le

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  • Method and device for detecting fault of power supply system of spacecraft
  • Method and device for detecting fault of power supply system of spacecraft
  • Method and device for detecting fault of power supply system of spacecraft

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Embodiment Construction

[0045] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0046] The spacecraft power system fault detection device that the present invention adopts is as image 3 As shown, the detection device includes: a spacecraft power system fault detection device, characterized in that, the power system fault detection device includes: an incident light source module, an optical fiber temperature sensor, a photoelectric conversion module, an AD conversion module, and an FPGA algorithm implementation chip ;The incident light source module injects laser pulses into the optical fiber, the laser pulses are reflected at the optical fiber temperature sensor, the photoelectric conversion module and AD conversion module receive the reflected light and convert it into a digital signal of the optical fiber temperature sensor and send it to the FPGA algorithm for chip processing; FPGA algorithm implementation Chip cont...

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Abstract

The invention discloses a method and a device for detecting fault of a power supply system of a spacecraft. The method is that the fault time is accurately detected through a fiber temperature sensor arranged on a primary bus of the power supply system by the wavelet theory based fault detection method according to the characteristic of temperature change of the bus in case of fault. The method comprises the steps of performing wavelet conversion for the original temperature signal containing noise; filtering a noise-containing multi-layer signal through wavelet entropy to remove most of the noise; performing the adjacent multi-scale product method to further inhibit the non-filtered noise interference; detecting the maximum value of a die so as to determine the accurate fault occurrence time. With the adoption of the method and the device, the mis-judgment caused by noise influence can be avoided, and the fault detection accuracy can be increased.

Description

technical field [0001] The invention relates to a method and device for fault detection of a spacecraft power supply system, belonging to the technical field of spacecraft fault detection. Background technique [0002] A typical spacecraft power system such as figure 1 As shown, it mainly includes solar cell arrays, batteries, power conditioners, primary busbars, distributors, and loads. The power system converts solar energy obtained from the outside into usable electrical energy for payloads and support platforms. Due to the complexity of its system, high technology and the harshness of the space environment, the spacecraft has a high risk. [0003] Due to the influence of temperature, mechanical stress, and voltage and current stress, the primary busbar in the power system may experience aging, damage, or even fracture of the insulation, which will cause all loads in the entire power system to lose power supply, causing the spacecraft to fail in orbit . In order to obt...

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Application Information

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IPC IPC(8): G01R31/40G01K11/32
Inventor 秦剑华王东张绍杰王莉李向阳王世程
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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