摘要：The research of reliability design for impact vibration of hydraulic pressure pipeline systems is still in the primary stage,and the research of quantitative reliability of hydraulic components and system is still *** the condition of having obtained the numerical characteristics of basic random parameters,several techniques and methods including the probability statistical theory,hydraulic technique and stochastic perturbation method are employed to carry out the reliability design for impact vibration of the hydraulic pressure *** the instantaneous pressure pulse of hydraulic impact in pipeline,the reliability analysis model of hydraulic pipeline system is established,and the reliability-based optimization design method is *** proposed method can reflect the inherent reliability of hydraulic pipe system exactly,and the desired result is *** reliability design of hydraulic pipeline system is achieved by computer programs and the reliability design information of hydraulic pipeline system is *** research proposes a reliability design method,which can solve the problem of the reliability-based optimization design for the hydraulic pressure system with impact vibration practically and effectively,and enhance the quantitative research on the reliability design of hydraulic pipeline *** proposed method has generality for the reliability optimization design of hydraulic pipeline system.

摘要：Tolerance design plays an important role in reliability design for electronic circuits. The traditional method only focuses on the consistency of output response. It is not able to meet the needs of increasing development of electronic products. This paper researches the state of related fields and proposes a method of multi-objective reliability tolerance design. The characteristics of output response and operating stresses on critical components are both defined as design objectives. Critical components and their operating stresses are determined by failure mode and effect analysis （FMEA） and fault tree analysis （FTA）. Sensitivity analysis is carried out to determine sensitive parameters that affect the design objectives significantly. Monte Carlo and worst-case analysis are utilized to explore the tolerance levels of sensitive parameters. design of experiment and regression analysis are applied in this method. The optimal tolerance levels are selected in accord with a quality-cost model to improve consistency of output response and reduce failure rates of critical components synchronously. The application in light-emitting diode （LED） drivers indicates details and potential. It shows that the proposed method provides a more effective way to improve performance and reliability of electronic circuits.

摘要：On the basis of analysing the reliability problems existing in the general design of a kind of multioption fuze. some problems such as the reliability model. the reliability distribution of the electronic part of the fuze are discussed. For a particular multioption fuze, *** to three different setting ways. the calculating methods of its operating reliability in six different operating states are given.

摘要：The LM-5B carrier rocket is a new-generation large-scale launch vehicle developed for space station launch *** separation system includes fairing separation,space station module-rocket separation,and booster *** separation systems play an important role in the design of launch vehicles,and any failure during the separation process would affect the final completion of rocket flight *** paper presents the reliability design and analysis for the LM-5B carrier rocket separation *** LM-5B carrier rocket separation system was developed on the basis of the LM-5 carrier rocket separation system,inheriting its booster separation system and fairing separation system scheme,which maximizes the reliability of the separation *** reliability of the LM-5B fairing separation system,booster separation system and space station module-rocket separation system can meet the requirements for launch *** demonstration results prove that redundant design of the separation systems was the most effective technical means to improve reliability.