A Dynamic Calibrator of Forced Dynamic Derivative Balance

Abstract

The invention provides a forced dynamic derivative balance dynamic corrector comprising a pedestal; two arc coils; an installing sleeve and an installing platform, wherein the two ends of the installing sleeve are installed on the two arc coils through the installing platform; and multiple magnetic field generators which are arranged on the pedestal, wherein the arc coils are arranged in the Lorentz force effect channel formed by the magnetic field generators in a floating way. In working of the dynamic corrector, the arc coils are electrified and then move in the strong magnetic field formedby the magnetic field generators to generate the Lorentz force, and the force changes along with the change of the moving speed and direction of the movement calibration frame so as to form alternating dynamic load and thus dynamic calibration of the balance can be realized.

Description

technical field [0001] The invention belongs to the field of wind tunnel tests, in particular to a dynamic corrector for a forced dynamic derivative balance. Background technique [0002] In the field of wind tunnel test, there is a distinction between static test and dynamic test. Static test refers to the measurement of the aerodynamic characteristics of the aircraft in a steady flow field (the velocity, direction, pressure, etc. The external flow field is in an unsteady state (the velocity, direction, pressure, etc. of the flow field environment are in a state of change). For the forced dynamic derivative test, the unsteady state is caused by the movement of the model driven by the vibration exciter. [0003] For balance calibration, there is also a difference between static calibration and dynamic calibration. The static balance calibration mechanism is a ground test device used to simulate the static working state of the balance. It can calibrate the six-component load ...

AI Technical Summary

Problems solved by technology

[0004] 1. During the unsteady aerodynamic test, the calibration of the inertial force (moment) of the model system requires a dynamic balance calibration mechanism. The use of static calibration will cause measurement errors because it cannot reflect the time lag of the system itself

[0005] 2. During the cross derivative test, the mechanical damping calibration of the model system requires a dynamic balance calibration mechanism, and static calibration cannot give the mechanical damping of the model system

[0006] At present, because there is no dynamic calibrator capable of generating alternating loads in China, the forced dynamic derivative test generally only performs static calibration and no-wind calibration without alternating loads, which will cause large systematic errors in the test results.

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