Optimal maintenance strategy on medical instruments used for haemodialysis process

Ming, Tan; Narula, Udit; An, Lai Lu; Pandey, Sumit Kumar; Hua, Tung Jung; Chung, Yi Li

doi:10.17531/ein.2019.2.17

Cited by 3 publications

(1 citation statement)

References 34 publications

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“…Hoseinie [24] considered that in the case of complete maintenance, the minimum maintenance rate can be treated as the optimization goal, and thus obtained the optimal inspection interval for a water injection system. Tan [25] proposed an optimal maintenance strategy for medical instruments with the goal of reducing maintenance costs and improving operational availability. Khatab [26] developed a new maintenance optimization model for failure-prone systems and discussed some of its main cost components; for this model, the preventive maintenance threshold and the number of inspections were optimized separately.…”

Section: Introductionmentioning

confidence: 99%

Maintenance Optimization Model with Sequential Inspection Based on Real-Time Reliability Evaluation for Long-Term Storage Systems

Bai

Zeng

2019

Processes

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For long-term storage systems such as rockets and missiles, most of the relevant models and algorithms for inspection and maintenance currently focus on analysis based on periodic inspection. However, considering factors such as the complexity of the degradation mechanisms of these systems, the constraints imposed by failure risk, and the uncertainty caused by environmental factors, it is preferable to dynamically determine the inspection intervals based on real-time status information. This paper investigates the issue of maintenance optimization modelling for long-term storage systems based on real-time reliability evaluation. First, the Wiener process is used to establish a performance degradation model for one critical unit of such a system, and a closed-form expression for the real-time reliability distribution is obtained by using the first-hitting-time theory. Second, sequential inspection intervals are dynamically determined by combining the real-time reliability function with a real-time reliability threshold for the system. Third, a maintenance optimization model is established for the critical unit based on update process theory. An analytical expression for the expected total cost rate is derived, and then, the real-time reliability threshold and the preventive maintenance threshold for the unit are jointly optimized by means of Monte Carlo simulation, with the lowest expected total cost rate as the optimization goal. Finally, two examples of a gyroscope and an alloy blade that are commonly used in the long-term storage systems are considered, and the validity of the proposed model is illustrated by means of a sensitivity analysis of the relevant parameters.

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Section: Introductionmentioning

confidence: 99%

Maintenance Optimization Model with Sequential Inspection Based on Real-Time Reliability Evaluation for Long-Term Storage Systems

Bai

Zeng

2019

Processes

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Opportunistic maintenance strategy of a Heave Compensation System for expected performance degradation

Zhang¹,

Qian²,

Dui³

et al. 2021

Eksploatacja i Niezawodność – Maintenance and Reliability

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In the marine industry, heave compensation systems are applied to marine equipment to compensate for the adverse effects of waves and the hydraulic system is usually used as the power system of heave compensation systems. This article introduces importance theory to the opportunistic maintenance (OM) strategy to provide guidance for the maintenance of heave compensation systems. The working principle of a semi-active heave compensation system and the specific working states of its hydraulic components are also first explained. Opportunistic maintenance is applied to the semi-active heave compensation system. Moreover, the joint integrated importance measure (JIIM) between different components at different moments is analyzed and used as the basis for the selection of components on which to perform PM, with the ultimate goal of delaying the degradation of the expected performance of the system. Finally, compared with conditional marginal reliability importance (CMRI)-based OM, the effectiveness of JIIM-based OM is verified by the Monte Carlo method.

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Importance measure-based maintenance strategy considering maintenance costs

Zhang¹,

Zhang²,

Dui³

et al. 2022

Eksploatacja i Niezawodność – Maintenance and Reliability

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Maintenance is an important way to ensure the best performance of repairable systems. This paper considers how to reduce system maintenance cost while ensuring consistent system performance. Due to budget constraints, preventive maintenance (PM) can be done on only some of the system components. Also, different selections of components to be maintained can have markedly different effects on system performance. On the basis of the above issues, this paper proposes an importance-based maintenance priority (IBMP) model to guide the selection of PM components. Then the model is extended to find the degree of correlation between two components to be maintained and a joint importance-based maintenance priority (JIBMP) model to guide the selection of opportunistic maintenance (OM) components is proposed. Also, optimization strategies under various conditions are proposed. Finally, a case of 2H2E architecture is used to demonstrate the proposed method. The results show that generators in the 2E layout have the highest maintenance priority, which further explains the difference in the importance of each component in PM.

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Optimal maintenance strategy on medical instruments used for haemodialysis process

Cited by 3 publications

References 34 publications

Maintenance Optimization Model with Sequential Inspection Based on Real-Time Reliability Evaluation for Long-Term Storage Systems

Maintenance Optimization Model with Sequential Inspection Based on Real-Time Reliability Evaluation for Long-Term Storage Systems

Opportunistic maintenance strategy of a Heave Compensation System for expected performance degradation

Importance measure-based maintenance strategy considering maintenance costs

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