A double-ended calibration device and calibration method

Abstract

The invention relates to a double-end calibration device and a calibration method and belongs to the technical field of aerodynamic force measurement of aerospace force test. The double-end calibration device with the middle fixed and two ends free is used for calibration during force test of wind tunnel aerodynamic / kinematic coupling research. The double-end calibration device mainly comprises two sets of L-shaped sliders and loading heads which are used cooperatively, one end of the front L-shaped slider is connected with the front loading head while the other end of the same is connected with the front end of a double-end force measurement device, and the rear L-shaped slider is connected with the rear loading head while the other end of the same is connected with the rear end of the double-end force measurement device; the loading heads are four-point type frame loading heads, do not interference with each other in space and are used for applying longitudinal load; the L-shaped sliders are connecting pieces between the force measurement device and the loading heads, do not interference with each other in space, are provided with a pair of longitudinally-symmetrical resistance loading points, and are used for applying axial load. The problem about calibration of the double-end force measurement device in special test is solved, six components can be calibrated at most, and the device and the method are simple and feasible special force measurement device calibration schemes indeed.

Description

technical field [0001] The invention belongs to the technical field of wind tunnel aerodynamic measurement devices, and in particular relates to a double-end calibration device and a calibration method. Background technique [0002] At present, special force measuring devices need to be designed in special wind tunnel force tests to measure the magnitude, direction and point of action of the aerodynamic load on the model. The force measuring device needs to be loaded by the calibration device before the test, and calibrated according to certain steps to obtain the relationship matrix between the output signal and the load, that is, the calculation formula, and determine the comprehensive error of the force measuring device. Commonly used calibration devices are slider type and sleeve type. According to the structural characteristics and loads of the force measuring device, the sleeve type calibration device is generally used for large load rod type force measuring devices, a...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the static calibration problem of the double-terminal force measuring device, the present invention provides a double-terminal calibration device and a calibration method

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