Aerospace Instrument-Making Annotation << Back MATHEMATICAL-STATISTICAL BASICS OF THE EVALUATION OF MEASURING INSTRUMENTS METROLOGICAL CHARACTERISTICS USING REDUCED DATA M.A. Levchenko M.M. Levchenko The theoretical basis of evaluation of the metrological characteristics of measuring devices, such as smart metering systems and sensors, in a passive metrological experiment, that is, when the reset exactly the same reference value of the measured quantity is not possible. In such conditions often repeated measurements are recorded at the points of a measuring range, close to the fixed points for multiple executions of the forward and reverse strokes. The presented approach is characterized by a procedure which reduces the results of measurements to the fixed points on the condition that the random error component of the measurement results is 50 АВИАКОСМИЧЕСКОЕ ПРИБОРОСТРОЕНИЕ, 2015 г. № 6 subject to the normal distribution law. A theorem on the unbiasedness of reduced data that obey normal distribution and are characterized by nonuniformly precise is formulated and proved. In addition to the probability aspect of the approach, its computational side is considered, i.e. the measurements processing algorithms proper that are recommended to use and allow you to extract the maximum information about the metrological characteristics of the tested measuring instrument, to carry out parametric identification of its conversion function and to minimize the intrinsic error in a passive metrological experiment. Key words: metrological characteristics, measuring instrument, evaluation, reduced data, uniformly precise, bias, normal distribution law. Contacts: E-mail: imeasure13@gmail.com Pp. 49-55.