Reliability Analysis of Repairable System With Multiple-Input and Multi-Function Component Based on GO Methodology

Abstract

GO methodology is a success-oriented method for system reliability analysis. There are Multiple-Input, which contain control signal, oil provided and electrical signal et.al and MultiFunction Components (MIMFC) in some repairable systems, such as double-action variable displacement pump, multiple directional control valve, and hydraulic coupler etc. Because existing 17 basic GO operators in GO methodology can’t describe these MIMFCs accurately, it is a problem to adopt existing GO methodology to conduct the reliability analysis for these systems with MIMFC. In this paper, firstly a new GO operator combination, which is composed of a new function GO operator and a new auxiliary GO operator, is created to represent MIMFC. The new function GO operator named as Type 22 operator is created to represent MIMFC itself, and the auxiliary GO operator named as Type 15B operator is created to represent multi-conditions control signals of MIMFC. Then, quantitative calculation formulas of new GO operator combination are derived based on logical relationships among inputs, outputs, and component itself. Thirdly, this new GO operator combination is applied for the first time in steady availability analysis and qualitative analysis of the fan drive system of a Power-shift Steering Transmission. Finally, the results obtained by the method in this paper are compared with the result of Fault Tree Analysis (FTA) and result of Monte Carlo simulation, and the comparison results show that this new GO operator combination is usable and correct for reliability analysis of repairable system with MIMFC, and it has more advantageous in the aspects of building system model and quantitative analysis. Meantime, this paper provides guidance for reliability analysis of other repairable systems with MIMFC.

Complex System Reliability Analysis Method: Goal‐Oriented Methodology

“…Recently, the GO method has also been applied in the reliability analysis of defense systems, water, oil, and gas supply systems, manufacturing systems, transportation systems, power systems, and logistics management systems [2,3]. Furthermore, the theory of GO method for a complex system with complex correlations (dependencies), closed-loop feedback, multiple functions, multiple fault modes, etc., has been developed from three aspects, which are GO model, basic GO algorithm, and GO method for complex systems with various characteristics [9][10][11][12][13][14][15][16][17]. Literature [2,3] gave the overview of development of GO method in detail.…”

A new reliability analysis method for repairable systems with closed‐loop feedback links

“…In order to conduct an effective reliability analysis for a system with multiple states, Zhou et al redefined the Type 3 operator to describe 3 states for the main charge of the retracting actuator and improved the Type 15 operator to describe the logic relations of the multi‐state output, and Yi et al created a new function GO operator named Type 19 operator to describe the unit turning unstable operation into normal operating . For multi‐function units, Yi et al created a new GO operator by combining the Type 15B operator and Type 22 operator to represent it, and they also simplified the GO model and improved the efficiency of GO operation for multifunction systems In order to further improve the efficiency of GO operation and conduct reliability analysis of complex systems with characteristics, some GO algorithms and reliability analysis methods based on GO method were proposed.…”

A new reliability analysis method for repairable systems with multifunction modes based on goal‐oriented methodology

“…Although the above GO methods can be used to conduct reliability analysis for repairable systems with some characteristics, they have 3 limitations in dealing with repairable systems with MFM: (1) The function GO operator representing one component is only allowed to use once, and the existing GO operators cannot be used to describe the characters of MFM, so the existing GO model does not cover the multifunction system with MFM; (2) the existing GO operation rules are not suitable for repairable systems with MFM; and (3) function modes with different operating frequencies exist in one‐function subsystems, such a character of MFM has not been considered by the existing GO methods. Although a new GO operator was created by the combination of Type 15B operator and Type 22 operator to represent multifunctional component, it is only used to describe the multifunction components with multiple inputs signals . To the best of our knowledge, the reliability of repairable systems with MFM has not been analyzed by existing GO methods so far.…”