Reliability analysis for thermal cutting method based non-explosive separation device

Choi, Junwoo; Hwang, Kukha; Kim, Byung Kyu

doi:10.1007/s12206-016-1111-8

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…They include a diode in the booster circuit, a capacitor as a source of energy An electronic fuze has three critical components that are affected by storage stresses and undergo degradation. They include a diode in the booster circuit, a capacitor as a source of energy for a squib or detonator, and a detonator or squib itself [37][38][39]. Due to their role in the successful operation of electronic fuzes, there RUL and reliability affect the overall life and reliability of the one-shot system.…”

Section: Accelerated Life Testing and Weibull Analysismentioning

confidence: 99%

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: Accelerated Life Testing and Weibull Analysismentioning

confidence: 99%

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

et al. 2020

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“…Wang et al [14] proposed a reliability analysis method based on T-S fuzzy fault tree, aiming at the problems of fault event polymorphism and fault data ambiguity of the lifting mechanism moving system, which effectively solved the problems of imprecise probability and complex fault states. Choi [15] and others carried out reliability analysis on the new non explosive separation device of small satellite by fault tree analysis method, and found 10 single point fault modes. Jiang [16] and others combined fuzzy theory and fault tree analysis technology to evaluate the reliability of Wushu competitive robot system and provide theoretical guidance for robot fault diagnosis.…”

Section: Introductionmentioning

confidence: 99%

Reliability evaluation of electromechanical braking system of mine hoist based on fault tree analysis and Bayesian network

Jin

Wang

et al. 2023

Mechanics & Industry

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Electromechanical braking system is the key way to improve the braking response ability of mine hoist. At present, the reliability research of electromechanical braking system is less. In order to further analyze and improve the reliability of electro-mechanical braking system, this paper adopts the reliability analysis method of electro-mechanical braking system based on fault tree and Bayesian network. Firstly, the fault tree of the electro-mechanical braking system is established, and then the fault tree is transformed into a Bayesian network, and the posterior probability, probability importance and key importance of each root node are inversely deduced. The diagnosis results show that the ball screw is the weakest link of the electro-mechanical braking system. Then the static simulation and fatigue life simulation of the ball screw are carried out for optimization, and the optimal model of the ball screw is determined. Finally, the electro-mechanical brake installed with the optimized ball screw is tested and analyzed. After the reliable performance test of the electro-mechanical brake, it is finally determined that the braking effect of the optimized electro-mechanical brake is stable.

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“…Ding 4 proposed a compact non-explosive actuator device activated by a thermal cutting method using nickel chrome wire, which has the characteristics of low impact and lightweight. To improve the reliability of the small satellite separation device, Choi 5,6 proposed a design, manufacturing and testing method of a wire cutting-based non-pyrotechnical drive device model for small satellites, developed a non-pyrotechnic separation device activated by the thermal cutting method of nickel-chromium wire, and analyzed the reliability of the developed separation device by fault tree analysis. Zhang 7 developed a design method of load transfer SMA (Shape Memory Alloys) actuator for separation device.…”

Section: Introductionmentioning

confidence: 99%

Design of point-type heavy load connection and low impact separation mechanism based on energy flow analysis

Wang

Yao

Wang

et al. 2022

Advances in Mechanical Engineering

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In this paper, based on the development of the non-pyrotechnic low impact connection and separation device for heavy load connection of large space vehicles, the design method of connection and separation device is studied. The traditional heavy load connection separation device has a strong loading capacity, but the release of system energy will cause a huge impact during separation. This paper considers the transfer of impact energy in the mechanism design process, reduces separation impact based on energy flow analysis. Based on the analysis of the DOF (Degree of Freedom) constraint function of the separation system and the working requirements of the separation mechanism, the movability model of separation system was established. According to the research on DOF constraints and release, the key of force constraints in DOF constraints of the separation mechanism is obtained, and the separation mechanism that can implement the force constraints and release is analyzed. Furthermore, based on the energy flow analysis of the separation mechanism, the design method of the low impact separation mechanism is proposed, obtained a non-self-locking thread pair connection separation mechanism. The effectiveness of the design method was verified by the energy conversion analysis of the separation mechanism.

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Reliability analysis for thermal cutting method based non-explosive separation device

Cited by 6 publications

References 5 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

Reliability evaluation of electromechanical braking system of mine hoist based on fault tree analysis and Bayesian network

Design of point-type heavy load connection and low impact separation mechanism based on energy flow analysis

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