Planning of Prototype Test Amounts at Creation Stage of Heat-power Equipment

The article is devoted to a problem of planning of tests' amounts of the completing components of the heat power equipment on a test phase of prototypes. The existing methods of test planning belong to large-lot products and mass production when it is possible to deliver a large number of elements on tests; in hydromechanical systems in case of testing new samples of multiplexing, valves, bearings, etc. The feature of the completing components of the heat power equipment is that they represent the devices consisting of set of elements of mechanical, electronic, hydraulic, pneumatic and other type, for example, turbines, bearings, generators, an oil system, steam lines, etc. The listed devices are expensive and therefore the existing methods of planning of test amounts demand specification. The condition of restorability of the examinee of a prototype after refusal by the carried out constructive completions is the basis for the offered method of planning of tests amounts. In this case the risk of the developer (manufacturer) is accepted close to zero α = 0,00001. Completion is considered effective if the carried-out tests at the stand in the same volume, as before completion, are successful. Thus, the novelty of the offered method of planning of test amounts allows to receive on one or two prototypes the required output characteristics, for example, reliability, safety, etc. In this article the methods of planning of test amounts for various laws of distribution of function of reliability are considered. In a particular, methods of planning of volume of tests for the law of distribution of function of reliability of a continuous random variable in the form of normal and exponential laws. In this article the formulas of test amounts for two set reliability indicator levels are given.

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