Design and Analysis of a Novel Locking Mechanism of MEMS Safety and Arming Device

Wang, Fu Fu; Lou, Wenzhong; Wang, Ying; Liu, Fang Yi; Lu, Jun; Wu, Jian

doi:10.4028/www.scientific.net/kem.609-610.856

Cited by 4 publications

(3 citation statements)

References 2 publications

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“…Therefore, the explosion-suppression-mechanism performance of the MEMS S&A device must be studied. A fluid–solid coupling algorithm is used mainly to study the dynamic response of MEMS S&A devices in the explosion-suppression-mechanism field [12].…”

Section: Parametric Calculation Methods Of Mems Sanda Device Under Dementioning

confidence: 99%

“…In 2014, Wang Fufu et al invented a MEMS security-system structure [11] that is now used primarily for fuze safety systems. In their design, the safety system is placed perpendicular to the fuze spring axis and double safety is used [12,13], whereby the system is designed to have the protective function of release from a long distance. Although this MEMS S&A device exhibits a high reliability and stability and a low power consumption [14,15], because of its special base materials it possesses a poor explosion-suppression-mechanism performance and cannot absorb the energy generated by the explosion-suppression mechanism [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Explosion Suppression Mechanism Characteristics of MEMS S&A Device With In Situ Synthetic Primer

et al. 2018

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The traditional silicon-based micro-electro-mechanical systems (MEMS) safety and arming (S&A) device fuze cannot isolate abnormal outputs in the detonation environment, which creates hazards for personnel. To address this problem, we report the design of a MEMS S&A device with integrated silver, copper, nickel and polyimide (PI) films, which is based on the principle of a MEMS S&A device and uses copper azide as the primer. The MEMS S&A device was optimized using theoretical calculations of the explosion suppression mechanism performance in a detonation field, where the theoretical model was verified by dynamic simulation (LS-Dyna). Silicon-based MEMS processing technology was used to integrate the MEMS S&A device with energy-absorbing materials, and the device performance was compared in detonation tests. Silicon-based MEMS S&A devices with silver, copper, nickel, and PI (100-μm-thick) achieved a reliable explosion suppression mechanism capability when exposed to a detonation wave. The residual stress was measured using Raman microscopy, and the PI film exhibited the best explosion suppression mechanism performance of the four materials. A reliability test to determine the maximum explosion suppression mechanism dose for a MEMS S&A device attached to a PI film (100-μm-thick) showed that the maximum amount of primer needed for the effective explosion suppression mechanism capability on the MEMS S&A device was 0.45 mg.

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Section: Parametric Calculation Methods Of Mems Sanda Device Under Dementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Explosion Suppression Mechanism Characteristics of MEMS S&A Device With In Situ Synthetic Primer

et al. 2018

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“…In recent years, the U.S. fuze annual conferences reported that the performance of on-chip-based S&A device is tested using the missile warhead at present [26][27][28][29][30], and the development trend of fuze technology is on-chip integration of machinery, electronics and pyrotechnics in the future. On this basis, our term developed a MEMS S&A device used in small-caliber ammunition innovatively, and the concrete structure as shown in Figure 2 [31][32][33]. The size of the device isΦ14×15 mm (except detonating tube, electric detonator and electric thruster).…”

Section: Introductionmentioning

confidence: 99%

Parametric Study of the Centrifugal Insurance Mechanism in MEMS Safety and Arming Device

Wang¹,

W²,

Feng³

et al. 2017

Preprint

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MEMS (Micro-electromechanical Systems) becomes important increasingly due to the smarter and smaller fuze used in OICW (Objective Individual Combat Weapon). MEMS Safety and Arming (S&A) device is employed in different platforms and regions for small caliber projectile. Therefore, it is necessary to make a parametric study of the MEMS S&A device in different apply environments and explore the main sensitive factors of the MEMS S&A device to provide reference for designs. In this paper, based on the MEMS S&A device designed by our term, theory and finite element models are established, and the centrifugal insurance mechanism of the MEMS S&A device is parametric studied under the different speeds, temperature and thickness of the model by nonlinear dynamic method. By comparing the experimental and predicted results, the established FEM model is verified, and the conclusion is that the temperature and the centrifugal force are the main sensitive factors in the centrifugal insurance mechanism. In summary, we can suggest that the application environment, which the MEMS S&A device is suitable for, is the temperature equal to or slightly greater than normal temperature and the rotating speed higher than35000r/min of small caliber projectile.

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The Parametric Analysis of the Threshold Value Judging Mechanism in MEMS Safety and Arming Device

Wang

Lou

Liu

et al. 2015

KEM

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In this paper, a mechanical MEMS S&A device has been proposed. The size of the device is 10mm×13mm×0.5mm. The role of the threshold value judging mechanism is to determine the environment suffered by centrifugal force and control the sub-centrifugal slider not movement under the threshold, so as to effectively guarantee the time of long-distance arming. Through establishing the three-dimensional model of threshold value judging mechanism, establishing the force and the parameters of locking-releasing mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory and establishing the finite element model by using ANSYS/LS-DYNA, appropriate threshold value judging mechanism is designed to meet two items, one item is the deformation of threshold value rod is not enough to release sub-centrifugal slider when the speed is less than 60000r/min; the other item is deformation of threshold value rod can release sub-centrifugal slider when the speed is more than 60000r/min.

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Design and Analysis of a Novel Locking Mechanism of MEMS Safety and Arming Device

Cited by 4 publications

References 2 publications

Explosion Suppression Mechanism Characteristics of MEMS S&A Device With In Situ Synthetic Primer

Explosion Suppression Mechanism Characteristics of MEMS S&A Device With In Situ Synthetic Primer

Parametric Study of the Centrifugal Insurance Mechanism in MEMS Safety and Arming Device

The Parametric Analysis of the Threshold Value Judging Mechanism in MEMS Safety and Arming Device

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