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Solid engine grain health monitoring and life evaluation method

A solid motor and health monitoring technology, applied in the direction of material impedance, etc., can solve the problems of the aging state of the solid rocket motor grain structure and the relationship between the life and the life.

Pending Publication Date: 2021-09-10
中国人民解放军火箭军工程大学
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Problems solved by technology

However, the electromechanical impedance method is usually used to analyze the internal damage of the structure, and it has not been able to establish a relationship with the aging state and life of the solid rocket motor grain structure.

Method used

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  • Solid engine grain health monitoring and life evaluation method
  • Solid engine grain health monitoring and life evaluation method
  • Solid engine grain health monitoring and life evaluation method

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Embodiment Construction

[0024] The method for health monitoring and life evaluation of solid motor grains according to the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] The solid motor grain health monitoring and life assessment method described in the embodiment of the present disclosure, such as figure 1 shown, including the following steps:

[0026] Step 1. When the lining layer 5 is painted on the inner surface of the engine heat insulation layer 4 and reaches the semi-cured state, N PZT sensors 3 are pasted on different positions of the lining layer 5, and numbered to construct a sensor array; then use the lining layer 5 material Manually paint and seal the wire parts of the sensor with slurry, and then pour, to establish a solid engine grain 2 aging monitoring system;

[0027] Step 2, original admittance data collection; by setting n sampling points, adopt broadband test collection to determine the electromechanical co...

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Abstract

A solid engine grain health monitoring and life evaluation method belongs to the field of engine monitoring, and is characterized in that a PZT sensor is used for measuring the impedance spectrum of a charge coupling machine embedded in an interface and analyzing the change of the charge coupling machine along with charge aging so as to analyze the aging characteristic, and by monitoring the change of the impedance RMSD of the grain of the engine along with thermal aging change through using a statistical method, the life of the grain of the engine is preliminarily evaluated. The health monitoring and life evaluation method for the grain of the solid engine is not only lossless but also active, and can be used for conveniently and effectively predicting the health monitoring and life of the engine.

Description

technical field [0001] The invention belongs to the field of engine monitoring, and in particular relates to a solid engine grain health monitoring and life evaluation method. Background technique [0002] Solid propellant grains are the main part of solid engine health monitoring. During storage, due to the oxidative cross-linking of propellant, the change of grain modulus will cause stress failure, which may lead to porosity and cracks in grains. These defects or damage will cause the combustion area of ​​the solid rocket motor to increase during combustion, thereby threatening the safety of the motor itself. Since the solid engine can only be used once, its health detection method usually adopts non-destructive testing. At present, the commonly used structural damage detection methods include: ray computed tomography (industrial CT technology), ultrasonic testing, electromagnetic ultrasonic testing, laser holography Detection method, infrared method, etc. However, since...

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Application Information

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IPC IPC(8): G01N27/02
CPCG01N27/02Y02P90/30
Inventor 段磊光王学仁强洪夫王哲君王广邹子杰
Owner 中国人民解放军火箭军工程大学
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