應用於虛擬實境的即時雙向耦合船舶模擬

Abstract

這篇論文的目標是建構一個虛擬實境的即時動態模擬快艇駕駛系統。我們提出一些新的方法，不論是物理模擬方面還是圖學方面都有所進步。 這個模擬系統可分為三個部份：船舶動態，流體動力學以及流體與船的雙向耦合。我們分別應用流體動力學以及力學來模擬海洋平面以及船舶模型。在這篇論文裡，波的傳遞將會考慮振幅衰減以及海底地形的影響，同時，波也會因為浮體運動而產生且在與船相遇時反射。另一方面，不只浮力會影響船，流體黏滯力以及波皆會對船造成影響。為了達到真實與即時的場景繪製，我們採用圖形處理單元(GPU)來協助並完成著色。最後，我們將這些演算法整合到六自由度的史都華平台，並且建構一個虛擬的船舶駕駛模擬器。由這種方式，我們可以感覺更加真實，且完成虛擬實境環境。

The goal of this thesis is to construct a real-time physical dynamic system of speed boat driving simulator for virtual reality application. We present several new methods to promote the last simulator system both physically and graphically. The simulation system is divided into three subsystems, the ships dynamics system, the hydrodynamics system, and two ways coupling between them. We apply hydrodynamic and mechanics to simulate the ocean surface and ship model respectively. In this thesis, the following factors about wave decays are taken into consideration: waves propagating velocity due to sea floor terrain, wave generated by object floating on the ocean, and reflection of wave due to conflict with the ship. On the other hand, the ship would be affected not only by buoyancy but also viscosity, current, wave and damping. We render the ocean surface by Graphics Process Unit (GPU) hardware to reach the visual realism. Finally we integrate this algorithm with a 6 DOF platform and construct a virtual ship driving simulator. By this way, we can achieve the desired realism, and complete the virtual reality environment.