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In order to estimate the quality variety law of the stockpile capacitance proximity fuze for HE scientifically and provide a kind of technical instrument for the army to monitor the quality of the capacitance proximity fuze for HE, this article designs an electic properties test system of capacitance proximity fuze for HE. This test sysytem is designed based on the virtual instrument technology and...
Reliability Based Design Optimization (RBDO) aims to optimize performance function under reliability constraints, which is not considered in the deterministic design optimization. During the past decades, with the advent of powerful computers, lots of literatures focused on developing the methods of RBDO for the accuracy and efficiency. However, with the application of RBDO in various cases, it is...
The Adaptive Particle Swarm Optimization method(A-PSO) combined the kinematic equations is proposed in this paper. The A-PSO is capable of solving the optimal solution of joint variables. The inverse kinematics mathematic model of the serial dangerous articles disposal manipulator with multiple degrees of freedom (Multi-DOFs) is built. In the proposed searching process, the position matrix and the...
To ensure the reliable use and to increase the ratio of cost to efficiency of the complex weapon system in the war, the reliability optimization of complex weapon system has received considerable study interest. Unfortunately, this kind of optimization problem usually belongs to the catalog of nonlinear optimization with multiple local extreme values. To make use of the global searching ability in...
This article introduces a new parameter estimation method, named E-Bayesian estimation method, to estimate failure rate derived from exponential distribution, in the case of data with only one failure. Firstly, the definition of E-Bayesian estimation is provided. Moreover, formulas of E-Bayesian estimation and hierarchical Bayesian estimation are provided. Secondly, properties of E-Bayesian estimation...
Real-time reliability assessment methods make it possible to asset system reliability on-line, which promote the development of the reliability research. A new method of real-time reliability assessment based on support vector regression (SVR) and Bayes is put forward in this paper. Firstly, principles of SVR and Bayes methods are particularly introduced, and then a model of real-time reliability...
After the completion of pipeline girth welding joint, the joint may be strengthened or softened and have high residual stress. Most of weld indies are acceptable, but when pipeline work under inner pressure conditions and the weld joint is high-accident risk zone. This paper establishes indirect coupling pipe 3D pipe multilayer V girth weld based on a weld temperature field and stress field of finite...
Crack of crankshaft and scuff of bearing have been the bottleneck for the development of large-scale reciprocating compressor. To solve such problems, modal and dynamic response analyses are performed for the crankshaft system. Torsional model shapes and stress status are obtained, which shows that the crack of original crankshaft results from fatigue damage and slight torsional vibration, and two...
Through analyzing the statistical properties of measured vibratory data for X-type aircraft, it confirms that non-Gaussian or nonstationary vibration environment exist in transportation and employment of equipments. The deficiencies of the existing vibration test methods and standard are pointed out, and the vibration test methods and flow chart based on measured data are proposed, which can effectively...
One of the most expensive and time-consuming activities of the software is locating the fault. Therefore, the software fault diagnosis technology and the Spectrum-based Fault Localization (SFL) is very significant to software quality assurance. Recently, the fault diagnosis technology based on the artificial intelligence theory attracts more and more attention. Multi-Agent Systems (MAS) have autonomy,...
Aiming at the atrocious storage environment of missile solid rocket motor, especially the higher requirement for structural reliability, based on the modified Arrhenius and GM-BP methods, the solid rocket motor life prediction principle was proposed. Using these methods, the engine life estimate and the propulsion system store life prediction model were founded. The modified Arrhenius method suits...
Firstly, the importance of subjects design in virtual maintenance training system is emphasized, and then the main factors that affect the design for subjects in virtual maintenance training are analyzed. Secondly, the detailed design process of virtual maintenance training subjects is illustrated based on the analysis of training requirements. Finally, this process is applied in the design of a concrete...
Optimization of spare part inventory is an important approach to improve operational readiness and reduce life cycle cost of equipment. Through analyzing the relationship of spare parts support and operational readiness for a two-echelon spare support system, an optimization model of multi-objective repairable spare parts is proposed. An algorithm is proposed for multi-objective optimization based...
A two-level inventory supply system is designed with considering the randomness of supply chain mode and consumption rate of military equipment. Each level inventory's cost construction is analyzed based on Economic Order Quantity (EOQ) model. The optimization of order and delivery period is validated by a real example.
Two level maintenance (2LM) concept is the core of modern aircraft maintenance support system. It is the key to improve aircraft availability. Based on the modern aircraft maintenance support system, this paper build a running model of 2LM concept by Petri net, and have a simulation with the variable initial parameters. Furthermore, the emphasis is to contrastively analysis the effectiveness evaluation...
The projection pursuit classification method is used to study the decision-making of plane's maintenance program, the optimal program is determined to improve the scientific of decision-making. Simulation examples show that the method is reasonable and effective.
Contraposing the problem of choosing an optimum maintenance mode for armored equipment important function components, RCM theories and methods are used to evaluate the fault criticality of the important function components and confirm the estimating indexes for the maintenance modes and their weight scales, while AHP method is applied to establishing the hiberarchy of the important function component...
Standard complex system reliability computation is an important topic for system engineers. Current approaches for reliability analysis are fault tree analysis, true value table or minimal path sets. FTA can not solve many complex problems. This paper introduces the method of Bayesian networks for reliability estimation. The complex systems bayesian networks can be built by a new method. Using the...
Reliability design of an aeroengine burner inner-liner is carried out using a bi-variant Lagrange factor polynomial approach. Thermal stress-dependent strength is represented by a discrete random variable that has different conditional probability mean functions under different thermal stress amplitudes. Then the LFP technique is developed to generate the stress-strength interference model with thermal...
In view of the current study on the reliability analysis for complex new equipment systems, the fault tree analysis method is used in reliability engineering (Fault Tree Analysis, FTA). However, qualitative and quantitative analysis for complex equipment systems reliability are difficult problems. In this paper, firstly, fault tree analysis method is introduced, secondly, through an instance of a...
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