scholarly journals Probabilistic approach to performance evaluation of a series-parallel system

2017 ◽  
Vol 6 (3) ◽  
pp. 74
Author(s):  
Saminu I. Bala ◽  
Ibrahim Yusuf
Keyword(s):  
Performance Evaluation ◽  
Steady State ◽  
System Performance ◽  
Probabilistic Approach ◽  
Parallel System ◽  
Death Process ◽  
Systems Of Differential Equations ◽  
In Series ◽  
Full Capacity ◽  
And Performance

The paper deals with modeling and performance evaluation of a series-parallel system using Markov Birth-Death process and probabilistic approach. The system consists of four subsystems arranged in series-parallel with three possible states, working with full capacity, reduced capacity and failed. Through the transition diagrams, systems of differential equations are developed and solved recursively via probabilistic approach. Explicit expressions for steady-state availability are de-rived. Availability matrices for each subsystem have been developed to provide various performance values for different combinations of failure and repair rates of all subsystems. The results from this paper will enhance the system performance and useful for timely execution of proper maintenance improvement, decision, planning and optimization.

scholarly journals Availability comparison between three dissimi-lar photovoltaic configurations

2017 ◽  
Vol 6 (3) ◽  
pp. 80
Author(s):  
Suleiman K ◽  
Ibrahim Yusuf ◽  
U.A. Ali ◽  
A. D Koko ◽  
Saminu I Bala
Keyword(s):  
Steady State ◽  
Differential Equations ◽  
System Performance ◽  
Probabilistic Approach ◽  
Death Process ◽  
System Availability ◽  
Systems Of Differential Equations ◽  
In Series ◽  
Full Capacity ◽  
Birth Death

The paper deals with availability comparison between three dissimilar photovoltaic configurations using Markov Birth-Death process and probabilistic approach. The configurations consist of four subsystems arranged in series-parallel with three possible states; working with full capacity, reduced capacity and failed. Through the transition diagrams, systems of differential equations are developed and solved recur-sively via probabilistic approach. Explicit expressions for steady-state availability are derived. Availability matrices for each subsystem have been developed to provide various performance values for different combinations of failure and repair rates of all subsystems. Furthermore, we compare the availability for the three configurations and find that configuration III is more reliable than system, I and II. The results have shown that the system availability increases with increase in redundant units. The results of this paper will enhance the system performance and useful for timely execution of proper maintenance improvement, decision, planning and optimization.

scholarly journals Markov chain approach to availability and profit evaluation of a series-parallel system with minor and major failures

2017 ◽  
Vol 6 (3) ◽  
pp. 67
Author(s):  
Saminu I. Bala ◽  
Ibrahim Yusuf ◽  
Yasin Ali Nuhu
Keyword(s):  
Probabilistic Approach ◽  
Parallel System ◽  
Death Process ◽  
Plant Management ◽  
Transition Diagram ◽  
System Availability ◽  
Markov Chain Approach ◽  
Systems Of Differential Equations ◽  
In Series ◽  
And Performance

The paper deals with modeling and performance evaluation of a series-parallel with independent failures using Markov Birth-Death process and probabilistic approach. The system consists of three subsystems arranged in series and parallel configurations with three possible states, working, reduced capacity and failed. Through the transition diagram, systems of differential equations are developed and solved recursively via probabilistic approach. Failure and repair rates for all the subsystems are assumed constant. Availability and profit matrices for each subsystem have been developed to provide various performance values for different combinations of failure and repair rates of all subsystems. Performance of each subsystem of series-parallel system is evaluated. The present study will help the plant management in understanding the optimum system availability and profit to be achieved, and the maintenance efforts needed to maintain an appropriate level of availability and profit and useful for timely execution of proper maintenance improvement, decision, planning and optimization.

scholarly journals Proposal and Performance Evaluation of a Magneto-Striction Type Torque Sensor Consisting of Small-Sized Coils Connected in Series

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Takahiko Tsujisawa ◽  
Kazuhiro Yamakawa
Keyword(s):  
Performance Evaluation ◽  
Response Time ◽  
Detection Method ◽  
Torque Sensor ◽  
Detection Range ◽  
Performance Targets ◽  
Sensor Drift ◽  
In Series ◽  
Target Performance ◽  
And Performance

We propose a sensor consisting of small-sized coils connected in series and a detection method for the sensor based on the iteration of the periodic time difference. The evaluation results are also presented and show the effectiveness of the proposed system. The target performance of the sensor is as follows: (i) a detection range from 0 to ±100 Nm, (ii) a hysteresis error of less than 1%, (iii) an angular-dependent noise of less than 2%, and (iv) a sensor drift of less than 2%. From the evaluation results, it is clear that these performance targets, as well as a sufficient response time, are realized.

Method of Parallel System Performance Evaluation Based on Multi-Level Fuzzy Synthetic Evaluation Model

2011 ◽  
Vol 301-303 ◽  
pp. 1202-1207
Author(s):  
Xue Mei Hou ◽  
Lei Yu ◽  
Zhi Bo Li ◽  
Zhu Ping Du ◽  
Bai You Lian
Keyword(s):  
Performance Evaluation ◽  
System Performance ◽  
Hot Spot ◽  
Evaluation Model ◽  
Evaluation Process ◽  
Parallel System ◽  
Fuzzy Synthetic Evaluation ◽  
Multi Level ◽  
System Performance Evaluation ◽  
Synthetic Evaluation

Nowadays, the parallel system performance evaluation is the hot spot topic. It’s helpful to improve the parallel system performance to establish a scientific evaluation model. In this paper, using of analytic hierarchy process and the fuzzy mathematics theory, the multi-level fuzzy synthetic evaluation model is established, the performance index system is defined and the parallel system performance evaluation process is realized.

scholarly journals DECISION SUPPORT SYSTEM OF A TAB MANUFACTURING PLANT

1970 ◽  
Vol 41 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Deepika Garg ◽  
Kuldeep Kumar ◽  
Jai Sigh
Keyword(s):  
Decision Support ◽  
Decision Support System ◽  
Differential Equations ◽  
Support System ◽  
Probabilistic Approach ◽  
Death Process ◽  
Manufacturing Plant ◽  
Transition Diagram ◽  
In Series ◽  
Grinding Machine

This paper discusses a decision support system for a Tab manufacturing plant. Tab manufacturing mainly consists of six subsystems working in series .Two subsystems namely Grinding machine, Electroplating machine are supported by stand-by units with perfect switch over devices and the remaining four subsystem are prone to failure. The mathematical model of Tab manufacturing plant has been developed using Markov birth – death Process. The differential equations has been developed on the basis of probabilistic approach using transition diagram which are further solved for steady state availability in order to develop the decision matrices which provide the various availability levels for different combinations of failure and repair rates of each subsystem.Key words: Availability; Differential Equations; Markov process; Steady StateDOI: 10.3329/jme.v41i1.5365Journal of Mechanical Engineering, Vol. ME 41, No. 1, June 2010 71-79

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