Pneumatic type multiple waveform active shock waveform generator

A shock waveform and multi-waveform technology, which is applied in the field of pneumatic multi-waveform active shock waveform generators, can solve problems such as difficulty in matching waveforms and precision, large and difficult acceleration peaks, and achieve large shock acceleration peaks, avoiding secondary shocks, The effect of reducing the time delay of the trailing edge

Inactive Publication Date: 2005-06-01
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, with the development of shock environment simulation technology today, in addition to several standard shock pulses that can be accurately defined by functions and can be reproduced more accurately and repeatedly in the laboratory, it is necessary to reproduce the real shock environment in enginee

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  • Pneumatic type multiple waveform active shock waveform generator

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Embodiment Construction

[0018] according to figure 1 Describe concrete composition, working principle and working process of the present invention:

[0019] The invention includes a complete set of elastic washers 1, a piston 5, a small atmospheric chamber 4, a high pressure chamber 6, a low pressure cylinder 8, a piezoelectric ceramic actuator 11, an impact platform 13 and the like. The piston 5 is located between the high-pressure cylinder 6 and the small air chamber 4 at normal pressure. The seal is realized by the close contact with the O-ring 10 between the cylinder head 12. The lower end is connected with the secondary piston rod 7, and the upper end is passed through the primary piston rod 2. Connected with the impact platform 13, the cylinder head 12 plays the role of fixing, sealing and guiding; the impact platform 13 has a complete set of elastic gaskets 1; the second-stage piston rod 7 extends down to the low-pressure air chamber 8, and is sealed by three or six petals 9 to achieve sealin...

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Abstract

The pneumatic active multi-waveform shock wave generator includes elastic washer system, the primary piston rod, O-rings, small normal pressure air chamber, piston, high pressure air chamber, the secondary piston rod, low pressure air chamber, split sealing ring, piezoelectric ceramic executor, cylinder lid, shock platform, large cylinder and small cylinder. The present invention can excite relatively large product with semi-sinusoidal wave, later-peak sawtoothed wave and other overload waveforms, and has excellent waveform controllability and repeatability. The present invention is used in heavy load and great shock test, and has wide application range, simple structure and high reliability.

Description

Technical field [0001] The invention is a kind of heavy-load and large-shock test requirements, and particularly relates to a pneumatic multi-waveform active shock waveform generator capable of generating half sine waves and rear-peak sawtooth waves. Background technique [0002] During the launching process of the missile, the sudden change of energy may damage the operational performance of the missile system, and often destroy the overall structural strength of the missile and the reliability of electronic equipment, reducing the hit rate. Therefore, in order to meet the increasingly higher precision requirements and safety requirements, before the missile leaves the factory, it is necessary to conduct a one-time overload test on the missile to ensure that the missile can work normally. However, when performing overload tests on heavy products, it is difficult to simultaneously obtain a large overload value and a long impact pulse width, and it is also difficult to contro...

Claims

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Application Information

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IPC IPC(8): G01M7/08
Inventor 何宁陈卫东李亮张家欢徐庆华程航赵威
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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