METHOD FOR IDENTIFYING ADDED MOMENT OF BODY INERTIA AND DEVICE FOR ITS IMPLEMENTATION

FIELD: measuring equipment.SUBSTANCE: method for identifying the added moment of body inertia consists in the fact that the body is brought to reversely symmetrical precession rotation around the vertical axis by an active force moment, the differences in the work of the active force moments are measured through the differences in the consumed electricity, by which the moments of body inertia are determined analytically using the equation of energy change, using the frontier positions and moduli of angular velocity vector. The body in the form of a ship hull is immersed in the model basin up to the waterline or with a predetermined draft and one or more reversibly symmetric rotations are made by the elastic forces moment around the vertical axis of the body, measured from an arbitrarily chosen angular position containing the stage of free decelerated measured rotation and the stage of a controlled reverse symmetric rotation with torque of forces in the corresponding angular positions, the work of the forces' torque is measured on the reverse rotation in a limited angular interval through the consumed electric power, the added moment of the body inertia is determined using two boundary values of the moduli of the angular velocity vector. The device for determining the added moment of the body inertia ocontains an automated electric drive with an elastic element in the form of a twistable torsion, wherein the body in the form of a ship hull is fixed through its mass center with a rigid rod with a frame in the model basin. The elastic element in the form of an elastic rod consists of two parts, one of the parts is fixed on the frame and on the support, and the second - on the rigid rod and on the bottom of the model basin, wherein the electric drive and the frame with which the angle-code sensor shaft, fixed to the support, are fixed on the rigid rod, and the electric drive is made in the form of an electric motor with an encoder and an axisymmetric massive flywheel located on the motor shaft coaxially with the vertical rotation axis of the ship's hull.EFFECT: expansed functionality during identification of added moments of body inertia of the ship form on systems of program management.2 cl, 3 dwg Изобретение относится к области гидродинамики, измерительной технике, лабораторным установкам, судостроению. Способ идентификации присоединенного момента инерции тела состоит в том, что телу активным моментом сил сообщают реверсивно-симметричное прецессионное вращен