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- W4313207265 abstract "There is much discussion about the further exploration of the moon and its implementation by autonomous robots and rovers. Prognostics and health management approaches are considered for autonomous systems to assure reliable operation. In this context, the reliability-adaptive systems approach deals with the prediction of the remaining useful life (RUL) to avoid maintenance conflicts. The proposed paper introduces a multi-system scenario on the lunar surface consisting of six rovers maintained by a single base. The rovers drill into the lunar surface and bring soil samples back to the base. To estimate the RUL as precisely as possible, the wear of the drill is monitored. Soil density, radiation, and soil versus rover temperature are just a few random aspects which are considered in the calculation of the drill failure rate. The simulation applies different values to the Weibull function shape parameter b > 1. This modeling represents the pessimistic assumption of an increasing soil density per drilling depth on the Moon. The base can maintain only one rover at a time. To avoid maintenance conflicts and to maximize the total scenario soil output, some rovers are derating their performances in order to extend their RUL so that all rovers reach the base preferably one after the other. When predicting the RUL, all previous failures, the current performances, and RUL prognoses of all rovers are considered. The paper discusses the operation algorithm including the rover procedures. The proposed contribution compares the efficiency of systems operated either conventionally in a non-derating mode or in a reliability-adaptive mode. The scenario-wide workload performed by all rovers is the evaluation measure in this approach. The following results have been obtained: Reliability-adaptive systems are operating more efficiently in the given lunar context than the conventional systems operate as the adaptive rovers continuously achieve higher up times in total. The longer the simulation time, the higher is the efficiency of reliability-adaptive operation. It has also been shown that reliability-adaptive systems have a significant influence on reducing delay times when returning to the drilling sites." @default.
- W4313207265 created "2023-01-06" @default.
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- W4313207265 date "2023-03-01" @default.
- W4313207265 modified "2023-10-16" @default.
- W4313207265 title "A lunar surface scenario simulation applying adaptive operating systems (revised version)" @default.
- W4313207265 cites W2007655149 @default.
- W4313207265 cites W3001620435 @default.
- W4313207265 doi "https://doi.org/10.1016/j.jsse.2022.12.002" @default.
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