Current signs and evaluation of machines’ aging

The wear of the machine as a whole is the total result of the poor technical condition of its constitu- ent elements. In this regard, for correct solution of applied problems, the machine should be present- ed as a probabilistic system of aging elements with incomplete restoration, and as a source of mainte- nance requirements for the restoration of its per- formance - the composition of distribution laws. In connection with described interpretation of ma- chines, there is a problem of evaluation of its tech- nical quality by the consumer. If only reliability indi- cators are used for these purposes, traditional con- cept of technical failure for such systems becomes insufficiently informative. In this case, it is more correct to use the integral indicator called "efficien- cy". This summary index is measured by the level of productivity and operating costs. One of final tasks of improving the system of resistance to ag- ing machines is to justify the standards controlling the moment of repair intervention as the perfor- mance of machines and the growth of operating costs...