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손병관,풍자용,윤원영 한국신뢰성학회 2023 신뢰성응용연구 Vol.23 No.4
Purpose: This paper explores the optimization problem of determining the position of sensors in a sensor system to cover the service area while considering the system’s reliability. Methods: A simulation and an approximation method are used to estimate the sensor system’s reliability, given the service area, sensing (coverage) radius, and sensor reliability. Three heuristic methods (uniform placement, P-center placement, and a genetic algorithm) are then proposed and compared numerically to determine the sensors’ locations to maximize the system’s reliability. Results: Based on the numerical studies, the genetic algorithm outperformed other methods in determining sensor locations with high reliability. A study was then conducted on the effects of the model parameters on the optimal locations. Conclusion: An optimization problem is studied to determine the optimal locations of sensors in a system for a given service area, sensing (coverage) radius, and sensor reliability. Simulated and approximate methods are used to estimate reliability, and a numerical comparison is conducted between three heuristic methods. The genetic algorithm provided the best results. A sensitivity analysis was conducted to understand the effects of model parameters on the optimal locations.