RUL assessment and construction of maintenance strategies for engineering objects

Abstract

Actual trends in the construction of systems of various types of maintenance; rather their choice in a particular situation is usually determined by the technical state of engineering at the time. Accurate information about its operating condition and prognosis of all detected trends to the side of failures or increasing risks or failures are necessary for the correct determining the optimal maintenance strategy and in general strategy of operational service of engineering object. Thus the life cycle of engineering relatively the types of operational service and maintenance methods is divided into several time intervals determined by the conditions of the object and prognosis. Their maintenance sets of measures are determined at each time interval from operating measures of self-maintenance to end of life management: reuse-remanufacture-recycle. Choice of various types of maintenance is more effective at accurate determining the state of engineering at the failure progression timeline. Account of optimization problem of operating costs throughout the life cycle of engineering in many respects is determined by exact definition of engineering positions on the failure progression timeline and the rate of evolution to failure state of engineering at particular time interval. Thus, different types of monitoring for engineering are required for the construction of systems of local RUL assessments. The considered problems of the state and RUL assessments are solved by integration of remote computing PHM clusters and on-board diagnostic systems of engineering object. RUL evaluation methods in the monitoring process at all time stages of the engineering operating are demonstrated in this chapter. Maintenance strategy for all operating phases and some methods of self-maintenance available for use by varying the control parameters of an engineering object are discussed. In particular, the management solutions in order to minimize maintenance costs for certain time intervals of engineering object operating are given.