Software Development Of Visualization System For Deformation Monitoring Of Plate Beam Structure

With the continuous development of aerospace,aircraft is gradually becoming one of the main modes of travel,and drones also play a important role in military,rescue and agriculture.During the flight,the aircraft wing is prone to deformation due to its mechanical mechanism and the weather.The deformation of the aircraft wing affects the electrical performance of the airborne antenna and the accuracy of the airborne weapon’s hit,interferes with the normal navigation of the aircraft and even creates unsafe hidden dangers.Therefore,it is very important to monitor the deformation of the wing in real time to ensure the normal navigation of the aircraft.However,conventional photogrammetry methods have problems such as installation,fixing,and calibration difficulties,making it extremely difficult to accurately measure wing deformation during navigation.This paper focuses on the inverse finite element deformation measurement method based on strain information,introduces the visualization of graphics to the field of deformation monitoring,and develops the visualization system software for the deformation of the Plate beam structure to realize the visual monitoring of the deformation of the wing.This article specifically did the following work:(1)Aiming at the problem of deformation and reconstruction of plate beam structure deformation,the inverse finite element theory is derived and the theoretical feasibility is verified by simulation and experiment.Firstly,based on the theory of Timoshenko beam,the relationship between surface strain and structural displacement is derived from the least squares relationship between the theoretical strain and the actual strain.Then,under the concentrated load or distributed load of the cantilever beam,different strain measurement positions are selected to verify the effect of inverse finite element method deformation reconstruction.Finally,the feasibility of IFEM for the truss and frame model is verified.(2)Aiming at the problem of deformation monitoring of plate beam structure,the visualization system of plate beam structure deformation monitoring was designed and the key technology of the system was studied.Firstly,the deformation monitoring visualization system is designed,including the hardware system and system software of deformation monitoring.Secondly,based on the measurement principle of fiber Bragg grating sensor,a high-precision and stable deformation monitoring hardware system is built,which mainly includes FBG sensor network and fiber grating demodulator.Then analyze the requirements of the deformation visualization system software in detail,and design the overall framework and function modules of the software.Finally,the key technologies in the software of deformation visualization monitoring system are studied,including MFC framework,network socket and VTK graphics visualization technology.(3)According to the overall framework and functional modules of the software,the software for the deformation monitoring system of the plate beam structure was developed.Based on the MFC-based document view framework,VTK visualization tool and VS2013 integrated development platform,the software front-end interface and background framework are designed and implemented.The software mainly develops the demodulator communication module,the deformation reconstruction module and the graphic display deformation module to realize four fucntion of the real-time acquisition of the measurement point strain data,the dynamic display of structure deformation,the real-time display of important point displacement data and the observation structure deformation of different viewing angles.Finally,The hardware system monitoring the deformation of the wing model is connected to test software,the test results show that the visual monitoring software not only can visually display the deformation of the wing,but also the various functions run well,which can achieve the purpose of monitoring the wing deformation intuitively,accurately and efficiently.The deformation monitoring visualization system software can be used in experimental research of deformation measurement and reconstruction to improve the efficiency of research.At the same time,the development of the software provides development experience for the development of deformation monitoring visualization system software in future.