Electromagnetic suspension force measuring device and method for separated measurement of dynamic and static aerodynamic loads

Abstract

The invention discloses an electromagnetic suspension force measuring device and method for separated measurement of dynamic and static aerodynamic loads, and aims to solve the technical problems of low frequency response, rigidity-resolution contradiction, poor measurement precision caused by dynamic-static coupling and the like when a strain balance technology is adopted for measurement. The device comprises a bearing end flange, a linear bearing, an electromagnetic force measuring device and a fixed end flange. During measurement, an electric control system respectively and successively controls a static suspension assembly and a dynamic suspension assembly to realize 'displacement return-to-zero', so that corresponding dynamic and static loads are obtained according to respective current-aerodynamic force mapping relations, and high-precision acquisition of the measured dynamic aerodynamic force is finally realized through superposition. The electromagnetic force measuring device is high in frequency response and resolution ratio, the measured dynamic aerodynamic force is divided into a static part and a dynamic part to be measured respectively, static and dynamic measurement decoupling and optimal matching of static measurement rigidity and dynamic measurement rigidity are achieved, and the measurement precision is greatly improved.

Description

technical field [0001] The invention relates to an experimental force measuring device and method, in particular to an electromagnetic suspension force measuring device and method for separating measurement of dynamic and static aerodynamic loads, belonging to the technical field of experimental aerodynamic measurement. Background technique [0002] With the development of my country's aerospace technology, the development of new weapon models is endless, and its requirements for aerodynamic ground test technical capabilities have also increased, especially the demand for accurate measurement of dynamic aerodynamic forces has shown a trend of rapid growth in recent years. . In some new aircraft designs with low stiffness components or overall lower stiffness designs, high-precision dynamic aerodynamic measurements are required for ground-based wind tunnel testing; e.g., dynamic aerodynamic forces / torques during aircraft-projectile separation and aircraft flutter , buffeting ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem of the present invention is: to overcome the above-mentioned deficiencies of the prior art, aiming at the precise problem of dynamic aerodynamic load in the ground aerodynamic test, provide a dynamic and static aerodynamic The electromagnetic levitation force measuring device and method for load separation measurement solves technical problems such as low frequency response / resolution, dynamic / static coupling, and poor measurement accuracy when using strain balance measurement, and realizes dynamic aerodynamic high-precision measurement

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