Design of High-Reliability Micro Safety and Arming Devices for a Small Caliber Projectile

Wang, Dakui; Lou, Wenzhong; Ye, Feng; Zhang, Xinzhao

doi:10.3390/mi8080234

Cited by 21 publications

(11 citation statements)

References 14 publications

(15 reference statements)

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“…The energy stored in the capacitor is dissipated in the squib causing it to produce an explosion. The health of the capacitor assures the strength of the explosion, which is required to initiate the explosive train as mentioned in [11], and therefore the capacitor is a critical component. As shown in Figure 2b, the environmental chamber is interfaced with the automatic test equipment (ATE) or measuring instrument and the results are tabulated after every four hours.…”

Section: Methodsmentioning

confidence: 99%

“…The energy stored in the capacitor is dissipated in the squib causing it to produce an explosion. The health of the capacitor assures the strength of the explosion, which is required to initiate the explosive train as mentioned in [11], and therefore the capacitor is a critical component. For the squib, the relative humidity (RH) is taken as 40% and 70%, Ea = 1.00704 eV, and the temperature as 25 • C (T 1 ) and 70 • C (T 2 ).…”

Section: Methodsmentioning

confidence: 99%

“…Martin further explored the relationship between destructive testing and fatigue degradation to establish repair criteria for the reliability assurance of a one-shot system. Wang et al [11] studied the design of safety and arming design for a fuze at high speeds.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Reliability and Remaining Life Assessment of an Electronic Fuze Using Accelerated Life Testing

et al. 2020

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An electronic fuze is a one-shot system that has a long storage life and high mission criticality. Fuzes are designed, developed, and tested for high reliability (over 99%) with a confidence level of more than 95%. The electronic circuit of a fuze is embedded in the fuze assembly, and thus is not visible. Go/NoGo fuze assembly mission critical testing does not provide prognostic information about electrical and electronic circuits and subtle causes of failure. Longer storage times and harsh conditions cause degradation at the component level. In order to calculate accrued damage due to storage and operational stresses, it is necessary to perform sample-based accelerated life testing after a certain time and estimate the remaining useful life of mission critical parts. Reliability studies of mechanical parts of such systems using nondestructive testing (NDT) have been performed, but a thorough investigation is missing with regards to the electronic parts. The objective of this study is to identify weak links and estimate the reliability and remaining useful life of electronic and detonating parts. Three critical components are identified in an electronic fuze circuit (1) a diode, (2) a capacitor, and (3) a squib or detonator. The accelerated test results reveal that after ten years of storage life, there is no significant degradation in active components while passive components need to be replaced. The squib has a remaining useful life (RUL) of more than ten years with reliability over 99%.

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Section: Methodsmentioning

confidence: 99%

“…The energy stored in the capacitor is dissipated in the squib causing it to produce an explosion. The health of the capacitor assures the strength of the explosion, which is required to initiate the explosive train as mentioned in [11], and therefore the capacitor is a critical component. For the squib, the relative humidity (RH) is taken as 40% and 70%, Ea = 1.00704 eV, and the temperature as 25 • C (T 1 ) and 70 • C (T 2 ).…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Reliability and Remaining Life Assessment of an Electronic Fuze Using Accelerated Life Testing

et al. 2020

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“…Using MEMS pyrotechnics technology, ignition or detonation can rely on an energetic chip with centimeter or millimeter size, which can significantly promote the miniaturization, light weight and intelligence of the weapon system [1][2][3][4][5][6]. Recently, MEMS initiating device technology has developed rapidly and has been used in micro propulsion and micro initiators [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Guo

Long

et al. 2020

Micromachines

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In order to improve the mechanical strength of micro-booster based on 3,4-dinitrofurazanofuroxan (DNTF), 2,4-toluene diisocyanate (TDI) was introduced into the composite binder of nitrocotton (NC) and glycidyl azide polymer (GAP). A full-liquid explosive ink containing DNTF, binder and solvent was printed layer by layer. By the polymer cross-linking technology, the inkjet printed sample with three-dimensional network structure was obtained. The morphology, crystal form, density, mechanical strength, thermal decomposition and micro scale detonation properties of the printed samples were tested and analyzed. The results show that the printed sample has a smooth surface and a dense internal microstructure, and the thickness of the single layer printing is less than 10 μm. Compared with the raw material DNTF, the thermal decomposition temperature and activation energy of the printed samples do not change significantly, indicating better thermal stability. The addition of curing agent TDI increases the mechanical properties and charge density of the energetic composites. The elastic modulus and hardness are increased by more than 20%. The charge density can attain 1.773 g·cm−3, which can reach 95.5% of the theoretical density. The critical detonation size of the sample can reach 1 mm × 0.01 mm or less and the detonation velocity can achieve 8686 m·s−1, which exhibits excellent micro-scale detonation ability.

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“…Micro-electro-mechanical systems are commonly used as actuators, sensors, and radio frequency and microfluidic components, as well as bio-composites, with a wide variety of applications in health care, automotive, and military industries. It is expected that the market for MEMS will grow to over $30 B by 2050 [3,4,5,6,7]. …”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of the Elastic-Beam Delaying Mechanism in a Micro-Electro-Mechanical Systems Device

Fufu

Zhang

et al. 2018

Micromachines

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The delaying mechanism is an important part of micro-electro-mechanical systems (MEMS) devices. However, very few mechanical delaying mechanisms are available. In this paper, an elastic-beam delaying mechanism has been proposed innovatively through establishing a three-dimensional model of an elastic-beam delay mechanism, establishing the force and the parameters of an elastic-beam delay mechanism, deriving the mathematical model according to the rigid dynamic mechanics theory, establishing the finite element model by using Ls-dyna solver of the Ansys software, and carrying out the centrifugal test. Simulation and test results match theoretical results quite well. It is believed that the elastic-beam delaying mechanism is quite effective and useful to slow the speed of the movable part in MEMS devices.

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Design of High-Reliability Micro Safety and Arming Devices for a Small Caliber Projectile

Cited by 21 publications

References 14 publications

Reliability and Remaining Life Assessment of an Electronic Fuze Using Accelerated Life Testing

Reliability and Remaining Life Assessment of an Electronic Fuze Using Accelerated Life Testing

Inkjet Printing of GAP/NC/DNTF Based Microscale Booster with High Strength for PyroMEMS

Design and Analysis of the Elastic-Beam Delaying Mechanism in a Micro-Electro-Mechanical Systems Device

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