An approach to minimize the maintenance cost for an aircraft electrical power generator

This paper describes a Type II' maintenance policy that uses the nonhomogeneous Poisson process with a power-law intensity function to describe the failure data and the forward recurrence time. Previous theories had described the failure data using a distribution function. A cost function is derived that is dependent upon the replacement interval T. The optimal replacement interval is found when the cost function is minimized. This theory is illustrated with an application where the maintenance cost for an integrated drive generator is minimized.