Metrics family for criteria of control of technical systems state

The paper considers the problem of controlling state of a technical system being exploited under conditions of deficiency of information about its stochastic properties. A one-parameter family of metrics for control criteria is proposed. The metrics' parameter may be chosen depending on the requirements to the system reliability. The approach proposed permits some deviations from the minimax one which is traditionally applied under conditions of information deficiency. This feature of proposed approach results in decreasing maintenance costs for a class of systems which failure will not cause catastrophic consequences.