In this paper, a dynamic preventive maintenance strategy is proposed for
the problem of high maintenance cost rate due to excessive maintenance
caused by unreasonable maintenance threshold setting when complex
electromechanical equipment maintenance strategy is formulated.
Increasing failure rate factor and decreasing service age factor are
introduced to describe the evolution rules of failure rate during the
maintenance of the coating machine, and the BP-LSTM (BP-Long Short
Term Memory Network, BP-LSTM) model is combined to predict the
failure rate of the coating machine. A Dynamic preventive maintenance
Model (DM) that relies on dynamic failure rate thresholds to classify the
three preventive maintenance modes of minor, medium and major
repairs is constructed. A dynamic preventive maintenance strategy
optimization process based on Genetic-Particle Swarm Optimization
(GPSO) algorithm with the lowest cost rate per unit time in service phase
is built to solve the difficult problem of dynamic failure rate threshold
finding. Based on the historical operating data of the coating machine, a
case study of the dynamic preventive maintenance strategy of the coating
machine was conducted to verify the effectiveness of the model and the
developed maintenance strategy proposed in this paper. The results show
that the maintenance strategy developed in this paper can ensure better
economy and applicability.