Real-time Simulation System For Fuel Delivery Based On OGRE Graphics Rendering Engine

The fuel supply and transmission system is the most important one of thesesystems in the aircraft, which is equivalent to the blood circulation system in humanbody. Real-time access to the state of fuel in tanks and the overall distribution of thefuel in the fuel supply system is of important significance in the control of operatingstate of the aircraft and the improvement of oil circuit system. Due to the occlusion ofthe housing of the aircraft, the observation distance, and other drawbacks of traditionalmethods, the operating state of oil circuit system of the aircraft can only be accessed bythe sensor in the process of aircraft operation. Especially, the change of the fuel leveland the fuel distribution cannot reflect intuitively. With the continuing improvement ofcomputing performance and the successful application of virtual reality technology in avariety of mechanical design and verification, it becomes more and more urgent to usevirtual reality technology for visual collaborative simulation of fuel supply andtransmission system.In response to these needs, this thesis is focused on the fuel supply andtransmission system of a specific aircraft. On the basis of a detailed analysis of thesystem requirements and a deep study of the existing virtual reality technology, wedesign and develop a set of fuel simulation system which can intuitively display theconveying path, the changes of the oil level in each tank and the distribution of the fuelin time when the aircraft is running. Its main contents:(1) The architecture design of fuel simulation system. We use the classical C/Sstructure for practical application environment. This system encapsulates and transmitsthe received sensor data on the server side, and use the fat client to run the emulator.The emulator realizes the collaborative simulation of the fuel supply and transmissionsystem with the forwarding data from the server-side.(2) The scene layout. We achieve the static3D scene layout of the entire fuelsimulation system, including the layouts of the aircraft, hydraulic system, lighting andthe other entities in the static scene. Then these static scenes are rendered by OGREengine. (3) Fuel control. Fuel control is the core one of the whole system and also a majordifficulty. Fuel control mainly contains two parts: the fuel simulation and the oil control.The fuel simulation requires the ability to reflect the real effects of the fuel: the fuel istranslucent stored in the tanks, and the tanks are translucent mounted on the plane. Thesystem requires for clearly visible of the fuel and a very clear sense of hierarchybetween each component. Therefore, on the basis of in-depth study of the OGREgraphics rendering engine, we realize the simulation of the fuel effects by thetechnology of render queue cooperated with the material system of OGRE engine. Thecontrol of the oil level uses the periodic linear interpolation and quadratic interpolationmathematical methods to control the increase and decrease of the oil and the change ofthe oil level according to the sensor parameters.(4) Error compensation. There is a phenomenon of error accumulation of the fuelsimulation system in the process of controlling the fuel due to the accuracy of data andinterpolation problems. The system error compensation for every second eliminates theaccumulated error in the fuel control process. No apparent pause and dramatic changesare allowed in the process of error compensation, so we process the mean interpolation20times per second.(5) Fluid physics simulation. The study on PhysX physics engine fuel effectrealistic physics simulation to the more realistic simulation of fuel in effect details; thesame time, focus on the fuel level control that precision improvement feasibility study.