System for Metrological Support for Traceability of Measurements of Mass Geometry Characteristics

A system of metrological support is proposed that allows testing for the purpose of type approval, verification and calibration of stands for measuring the mass, center of mass coordinates and moments of inertia. A mathematical model of a special standard has been developed, which is based on analytic principles of determining the coordinates of the center of mass and the moments of inertia of uniform bodies of revolution of regular geometric shape. A special standard consists of a set of modules and specially shaped fasteners. Each module is a reference measure of both mass, center of mass coordinates and moments of inertia and can be used both separately and in a set with other modules. A scheme for transferring units of quantities from state primary standards of mass and length to stands with the help of special standards has been developed. A method for calibrating special standards is proposed, which includes indirect measurements of the coordinates of the center of mass and moments of inertia based on the results of direct measurements of the mass and geometric dimensions of the elements of the standard modules, as well as measuring the deviations of the shape and location of the surfaces of the standard modules and static balancing of the standard. The technical requirements for special standards have been established, which minimize the methodological measurement uncertainties when reproducing units of quantities. A line of special standards has been created that have passed certification and approval by Rosstandart. Methods for checking stands with the help of special standards have been developed and approved, and the types of two stands have been approved using special standards.