Method for apperceiving and reconstructing non-vision structural form of near space vehicle model

Abstract

The invention relates to a method for apperceiving and reconstructing a non-vision structural form of a near space vehicle model. The method comprises the following steps: on the basis of a distributed embedded dispersed bragg fiber grating sensing array, sensing and detecting strain information of each measuring point of a test model, and utilizing a certain curvature conversion algorithm to convert the strain information into curvature information; on the basis of a curvature interpolation, calculating the related coordinate value of each point of wings and frame of the test model according to a three-dimensional space curve fitting algorithm of orthogonal curvature information; utilizing a coordinate fuse algorithm to obtain an absolute coordinate value of each point of the model; and lastly, reconstructing the deformation state and the low-frequency vibrating form of the test model according to a computer graphic processing technology and realizing the three-dimensional visual real-time display for the change in the model form. An experimental system for the method comprises a simulated near space vehicle model, a fiber grating network analyzer with a network service function, a high-performance computer and a display, wherein the fiber grating sensing array is embedded into the surface of the simulated near space vehicle model.

Description

Technical field [0001] The invention relates to a non-visual form perception and reconstruction method of a fiber grating intelligent structure, in particular to a non-visual structure form perception and reconstruction method of a nearby space aircraft model. Background technique [0002] In today's world, competition in the field of aerospace is becoming increasingly fierce. Among them, the exploration of approaching spacecraft and related technology research have become hot topics. The adjacent space spans the stratosphere, middle layer and part of the thermal layer. It has the characteristics of thin air, low atmospheric density, low aerodynamic effect and aviation buoyancy effect. Therefore, aircraft cruising in this airspace have the characteristics of much greater speed than ordinary aircraft. For example, the cruising speed of a hypersonic near-space vehicle can reach up to Mach 9-12. Once a supersonic vehicle is excited by maneuvering or external interference, it wi...

AI Technical Summary

Problems solved by technology

These measurement methods and sensing technologies either collect a huge amount of data, complex data processing, or the collection accuracy is too low, it is difficult to accurately obtain the deformation information of the body structure, or due to the limitations of the detection data method and the required equipment structure, they cannot be adapted to the approaching space vehicles. The air and space environment, so it is difficult to apply to practical engineering

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