STAND FOR MEASURING AERODYNAMIC FORCES AND MOMENTS Russian patent published in 2022 - IPC G01M9/06 

FIELD: measuring technology.

SUBSTANCE: invention relates to a measuring technique used in an aerodynamic experiment, and is intended to measure forces and moments acting on a model of objects located in the air flow of a wind tunnel, for example, models of aircraft objects. The stand includes a dynamometer platform designed to fix the object model by means of measuring elements on a fixed support platform, with the possibility of moving the dynamometer platform along three orthogonal axes. At the same time, the platform is made with the possibility of placing on it the structural elements of the airframe of an aircraft object. In addition, each measuring element contains a beam-type strain gauge connected to a rod of circular cross-section, the axis of which is co-directed with the direction of action of the measured force. To measure the longitudinal force, one measuring element is installed, the rod axis of which coincides with the axis of symmetry of the dynamometer platform. To measure the transverse force, a pair of measuring elements is installed along the edges of the dynamometer platform, the rod axes of which are placed at an equal height from the fixed support platform. To measure the normal force and roll moment, three measuring elements are installed, the rod axes of which are perpendicular to the axis of symmetry of the dynamometer platform, while one of the three measuring elements is located at the front edge of the dynamometer platform, and its rod axis is located in the plane of vertical symmetry of the dynamometer platform, the other two measuring elements are placed at the rear edge of the dynamometer platform at the same distance from the plane of vertical symmetry of the dynamometer platform.

EFFECT: increase in the accuracy of measuring the components of the aerodynamic force vectors.

1 cl, 3 dwg