Design And Development Of Virtual Simulation Platform For Helicopter Trailing Edge Flap Control Based On Mixed Reality

Vibration has long been a problem in helicopter research,affecting airframe life and pilot health when severe,and a helicopter rotor with Actively Controlled Trailing Edge flaps(ACF)is one of the most powerful ways to reduce vibration levels.At the early stages of the helicopter trailing edge flaps control theory in the study,the lack of a unified simulation platform for data management and 3D visual display,this paper combines Microsoft Holo Lens mixed reality technology with real-time simulation technology to build a comprehensive simulation platform,which is committed to helicopter trailing edge flap control theory provides a new type of simulation environment,including real-time simulation verification,simulation data management,holographic visual demonstration,and human-computer interaction.By designing the overall scheme of the simulation platform,this paper completes the research and development of master control software,a mixed reality hologram,and a human-computer interaction system.The main research contents are listed as follows:(1)For real-time simulation of helicopter trailing edge flap control and mixed reality holographic display functions,the function and performance requirements of the simulation platform are analyzed,and the overall solution of the mixed reality virtual simulation platform is designed,including platform functional structure design and software and hardware development environment selection.(2)In view of the data management and monitoring requirements of the simulation platform,the master control software is developed based on Microsoft WPF(Windows Presentation Foundation)technology and MVVM Light open-source framework.Based on Simulink Real-Time simulation technology,the real-time simulation module is developed to realize the control and management of the real-time simulation process.Based on TCP/IP protocol and Protobuf-net serialization technology,the server network communication module is developed to carry out simulation data transmission with the Holo Lens client.The database management module is developed based on SQL Server,which can store and read real-time simulation data and experimental information.(3)Aiming at the requirement of helicopter trailing edge flap control simulation visualization,the holographic simulation view is built based on the Unity3D game engine.Holographic UI interface is developed based on Mixed Reality Toolkit(MRTK).The client network communication module is developed based on TCP/IP protocol,which receives the real-time simulation data sent by the master control software and realizes the data-driven holographic visual demonstration effect.(4)To meet the requirements of human-computer interaction functions of the simulation platform,a human-computer interaction system including gesture,voice,and gaze interaction is developed based on MRTK.Meanwhile,in order to facilitate non-Holo Lens users to experience mixed reality content,third-person perspective display functions based on Vuforia and ARCore are developed.Finally,this paper establishes a nominal model of helicopter rotor dynamics and conducts a helicopter trailing-edge flap control simulation experiment based on H_∞optimal control in a real-time environment.The simulation results verify the real-time and functional reliability of the platform.At the same time,a mixed reality third-person perspective demonstration experiment is carried out to verify the effectiveness of the spatial positioning and location-state synchronization functions.