METHOD AND DEVICES FOR TESTING SMALL ARMS AND/OR STAND TESTS OF ROCKET ENGINES Russian patent published in 2023 - IPC F41A31/00 

FIELD: military engineering.

SUBSTANCE: method for testing samples of small arms or rocket engines consists in organizing tests of the test sample fixed in the carrier. The carrier is hung on elastic elements inside the power frame, and the force factors created by the working test sample are determined relative to the reduction point located on the carrier and being the beginning of the orthogonal coordinate system. The projections of force factors on the coordinate axes and force moments relative to the coordinate axes are determined taking into account the reduced inertial, dissipative and elastic characteristics of the system according to the spatial linear and rotational movements of the carrier under the influence of force factors. The values of the inertial, dissipative and elastic characteristics of the test system are determined by the results of static and dynamic calibration of the mechanical system. With static calibration, stationary forces and force moments are applied to the carrier relative to the coordinate axes, which do not exceed the nominal values of the force factors created by the working test sample. According to the corresponding movements of the carrier during static calibration, the given elastic characteristics of the system are judged. With dynamic calibration, pulsed force effects are applied to the carrier relative to the coordinate axes, which cause oscillatory processes along the carrier movements relative to the selected coordinate axes and the origin of coordinates, the characteristics of which allow to determine the dissipative and inertial characteristics of the system. Devices for testing rocket engines and small arms samples differ from each other by the attachment point of the test sample in the carrier. The carrier designed to install a rocket engine in it has stops for fixing the engine. The carrier intended for installation of small arms in it has a node for fixing the sample with the angular positioning of the test sample required for testing relative to the coordinate axes, as well as a control unit for automatic firing of the sample. The devices contain systems for their static and dynamic calibration. The values of the spatial movements of the carrier are determined using video cameras or by the movements of light spots reflected from reflective (mirror) surfaces fixed on orthogonal surfaces of the carrier, light rays from coherent light sources, along planes with measuring rulers.

EFFECT: improving the efficiency, accuracy and reliability of testing rocket engines and small arms.

5 cl, 9 dwg