Interactive Visual Reality of the Offshore Hoisting Operation and Numerical Modeling

Abstract

To establish an accurate real-time visual reality system for offshore hoisting operations, the “Offshore Oil 201” crane ship was employed as a background, and a mathematical model for hoisting operations was created with regard to the influence of ocean environment, the dynamic positioning system of the crane ship, the ballasting system based on the ship’s six degree of freedom (DOF) real-time feedback, and the manipulation of the control system. An interactive three-dimensional virtual scene was constructed with the virtual reality technique, multi-channel data interaction, real-time numerical calculation, and semi-physical simulation in order to realize the immersive feeling of the scenes. Bliss approximate integration was used to solve the mathematical model of the hoisting system and the real-time data interaction of the simulation system was realized on the basis of the accurate solution. The simulation results show that the simulation system can solve the time response of the hoisting system with good calculation accuracy. The preview of the construction project of the offshore hoisting operation can be implemented by the simulation system to investigate the key parameters and hoisting process, which will effectively reduce the risk of offshore hoisting operations and enhance the safety of the offshore engineering operations. The problem of high cost of staffs’ training has been solved, and the simulation system has both accuracy and instantaneity, the whole process of offshore hoisting is demonstrated with the highest authenticity.

Emotional Interactive Simulation System of English Speech Recognition in Virtual Context

“…e test results can achieve a recognition rate up to about 75%. e authors in [16,17] have also conducted fruitful research on feature vector decomposition and fusion of speech emotion signals and feature vector dimensionality reduction, proposed improved classification quadratic functions, and improved Mahalanobis distance and other classification algorithms, and recognized in experimental data the good test performance on the rate. Currently, commonly used speech synthesis methods are parameter synthesis method and waveform stitching synthesis method [18,19].…”

Workplace Mental State Monitoring during VR-Based Training for Offshore Environment

“…Research has been done to develop VR-based offshore training with different modules such as safety handling [ 34 ], crane training [ 35 , 36 ], fire incidents [ 37 , 38 ] and hazard-based emergency response training [ 39 ]. Integration of VR technology in the chemical industry has been observed to improve training time and cost [ 14 , 40 ], and time for facility recovery and startup after shutdown [ 41 ].…”