a) State parameter database:Taking advantage of the
shore-contained diagnostic centers and the shipboard remote
monitoring system, collecting real-time data of the dredger
power system including thermal parameters, instantaneous
speed, shaft vibration, oil signals and etc, makes state
parameter database for ship power system.
b) Failure prediction model: Depending on mathematical
methods or reasoning tools such as SVM, Bayesian decision
and data mining, analyzes the degradation failure, sudden
failure and other complex sample.
c) Maintenance optimization strategy: In order to meet
the equipment reliability and find the most optimized
maintenance timing, it establishes an optimization model for
the preventive maintenance program and makes use of genetic
algorithm to solve.
d) Dynamic maintenance program: Based on the PHM
analysis and the optimization model, it determines the rolling
maintenance intervals and develops dynamic maintenance
program.
As shown in figure 6, the ship maintainability curve is
gradually increasing through kinds of maintenance measures in
the design phase, the manufacturing phase and the running
phase. However, the curve is momentary decreasing because of
the gap between the design thought and the implementation
results. Additionally, the curve is reduced little by little in the
late running phase.
In brief, with regard to the ship maintenance program,
through the maintenance optimization based on PHM, it greatly
increases the ship maintainability and provides technical
assurance for reasonable operation and scientific maintenance.
a) State parameter database:Taking advantage of the shore-contained diagnostic centers and the shipboard remote monitoring system, collecting real-time data of the dredger power system including thermal parameters, instantaneous speed, shaft vibration, oil signals and etc, makes state parameter database for ship power system. b) Failure prediction model: Depending on mathematical methods or reasoning tools such as SVM, Bayesian decision and data mining, analyzes the degradation failure, sudden failure and other complex sample. c) Maintenance optimization strategy: In order to meet the equipment reliability and find the most optimized maintenance timing, it establishes an optimization model for the preventive maintenance program and makes use of genetic algorithm to solve. d) Dynamic maintenance program: Based on the PHM analysis and the optimization model, it determines the rolling maintenance intervals and develops dynamic maintenance program. As shown in figure 6, the ship maintainability curve is gradually increasing through kinds of maintenance measures in the design phase, the manufacturing phase and the running phase. However, the curve is momentary decreasing because of the gap between the design thought and the implementation results. Additionally, the curve is reduced little by little in the late running phase. In brief, with regard to the ship maintenance program, through the maintenance optimization based on PHM, it greatly increases the ship maintainability and provides technical assurance for reasonable operation and scientific maintenance.
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