Acoustic Emission Testing of The Shell 0 f Electromagnetic Valve
نویسنده
چکیده
As the control valve of the propulsion system engine, the electromagnetic valve play an important role in attitude and orbit control for spacecraft. While the leak of the electromagnetic valve has always been the main cause of the failure of the propulsion system. Due to the shell’s complex structure as well as many seam weld on it, the normal NDT is unfit to check out some small cracks and micro-welding defects of the electromagnetic valve.
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