Interactive Visual Reality of the Offshore Hoisting Operation and Numerical Modeling

2018 ◽  
Vol 32 (08) ◽  
pp. 1855012
Author(s):  
Xiujun Xu ◽  
Zhen Li ◽  
Liquan Wang ◽  
Shaoming Yao ◽  
Xiaoming Fang
Keyword(s):  
Mathematical Model ◽  
Real Time ◽  
Physical Simulation ◽  
Three Dimensional ◽  
Accurate Solution ◽  
Simulation System ◽  
Time Data ◽  
Dynamic Positioning System ◽  
Visual Reality ◽  
Hoisting System

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.

Design on Light Geodesic Instrument Semi-Physical Simulation Training System Based on Virtual Scene

2014 ◽  
Vol 926-930 ◽  
pp. 1517-1521
Author(s):  
Xiang Jin Wang ◽  
Guo Dong Li ◽  
Zhi Lu Zhang ◽  
Zhe Li
Keyword(s):  
Real Time ◽  
Simulation Training ◽  
Physical Simulation ◽  
Low Cost ◽  
Three Dimensional ◽  
General Purpose ◽  
Training System ◽  
Time Data ◽  
Virtual Scene ◽  
Geodesic Instrument

This paper takes the light geodesic instrument as the research object, puts forward a design idea of the semi-physical simulation training system based on the virtual scene and realizes three-dimensional modeling, real-time scene drawing and real-time data driving display through Virtools and Visual C++. ARM7 and the general-purpose single-chip microcomputer are adopted to realize the function simulation of the equipment. This simulation training system has the characteristics of low cost, low power consumption and high simulation degree.

A Real-Time Mathematical Model for Three-Dimensional Tidal Flow and Water Quality

1991 ◽  
Vol 24 (6) ◽  
pp. 171-177 ◽  
Author(s):  
Zeng Fantang ◽  
Xu Zhencheng ◽  
Chen Xiancheng
Keyword(s):  
Mathematical Model ◽  
Water Quality ◽  
Real Time ◽  
Control Volume ◽  
Tidal Flow ◽  
Three Dimensional ◽  
River Estuary ◽  
Pearl River Estuary ◽  
Practical Application ◽  
The Pearl River

A real-time mathematical model for three-dimensional tidal flow and water quality is presented in this paper. A control-volume-based difference method and a “power interpolation distribution” advocated by Patankar (1984) have been employed, and a concept of “separating the top-layer water” has been developed to solve the movable boundary problem. The model is unconditionally stable and convergent. Practical application of the model is illustrated by an example for the Pearl River Estuary.

Design of Semi-Physical Simulation for Small Satellite by Virtual Display

2011 ◽  
Vol 130-134 ◽  
pp. 2684-2687 ◽  
Author(s):  
Kai Xu ◽  
Yan Lv ◽  
Guang Jin
Keyword(s):  
Control System ◽  
Real Time ◽  
Attitude Control ◽  
Physical Simulation ◽  
Simulation System ◽  
Space Environment ◽  
Small Satellite ◽  
Attitude Control System ◽  
Actual Environment ◽  
Virtual Display

Semi-physical simulation of attitude control system is the more synthetically test and verify for designing of small satellite control system. It is an important means of small satellite development. However, the results of current semi-physical simulation system have a lot of non-intuitive. Compare with the actual environment, the simulation environment still has striking disparity. So the shortcomings affect precision of simulation. Based on the virtual display technology, the group semi-physical simulation system has been constructed for attitude control of small satellite due to the combination with xPC real-time environment, the simulation computer, high-precision single-axis air-bearing turntable, reaction wheel, air thrust device, fiber gyroscopes, sensors synchronizer, power subsystem and wireless devices virtual display computer etc. Semi-physical simulation achieved the visual simulation in orbit and tracked new information of virtual environment of space into real-time simulation computer. Simulation results show that the simulation system for real-time attitude and orbit position of small satellite semi-physical simulation has an excellent display effect. At the same time, Real-time transfuse of orbit information provides a more accurate space environment simulation. The simulation system of small satellite attitude control to design and evaluate the more direct and convenient.

An Explicit Non-Real Time Data Reduction Method of Triple Sensors Hot-Wire Anemometer in Three-Dimensional Flow

1988 ◽  
Vol 110 (2) ◽  
pp. 110-119 ◽  
Author(s):  
Y. T. Chew ◽  
R. L. Simpson
Keyword(s):  
Real Time ◽  
Three Dimensional ◽  
Computation Time ◽  
Reynolds Stresses ◽  
Hot Wire ◽  
Time Data ◽  
Three Dimensional Flow ◽  
Mean Velocity ◽  
Dimensional Flow ◽  
The Mean

An explicit non-real time method of reducing triple sensor hot-wire anenometer data to obtain the three mean velocity components and six Reynolds stresses, as well as their turbulence spectra in three-dimensional flow is proposed. Equations which relate explicitly the mean velocity components and Reynolds stresses in laboratory coordinates to the mean and mean square sensors output voltages in three stages are derived. The method was verified satisfactorily by comparison with single sensor hot-wire anemometer measurements in a zero pressure gradient incompressible turbulent boundary layer flow. It is simple and requires much lesser computation time when compared to other implicit non-real time method.

Experimental Verification of a Dynamic Finger Model Using Real-Time Data Acquisition

2003 ◽  
Author(s):  
David McNeal ◽  
Farid Amirouche ◽  
Mark Gonzalez
Keyword(s):  
Mathematical Model ◽  
Real Time ◽  
Experimental Verification ◽  
Time Data ◽  
Stiffness Constant ◽  
Real Time Data ◽  
Flexion Moment ◽  
Human Finger ◽  
Finger Model ◽  
Annular Pulleys

The purpose of this experiment is to create a mathematical model for the function of the annular pulleys of the human finger in flexion. We have assumed that the flexion moment of the middle and proximal phalanges occurs at the proximal and distal ends of the A-2 and A-4 pulleys. The amount of force generated is dependent on the angle of flexion at the adjacent joint, the tension in the tendon and the stiffness constant of the pulley.

Real-Time Semi-Physical Simulation of Industry Design System Based on Virtual Reality Technology

2014 ◽  
Vol 607 ◽  
pp. 413-416 ◽  
Author(s):  
Jun Liu ◽  
Lin Xuan Zhang ◽  
Bing Cui
Keyword(s):  
Virtual Reality ◽  
Real Time ◽  
Physical Simulation ◽  
Design System ◽  
Joint Control ◽  
Real Time Control ◽  
Time Data ◽  
Time Control ◽  
Simulation Based ◽  
Virtual Prototyping Technology

Research how to realize real-time hardware in the loop (HIL) of industry design system by utilizing a variety of virtual reality (VR) hardware and software. In this paper, it introduces VR and virtual prototyping technology, and then proposes joint control and simulation based on ADAMS / Aircraft, Simulink, Flightgear three software. Moreover, the virtual scene, data gloves and real-time semi-physical simulation are analyzed and researched; finally as an example, build a real-time semi-physical simulation platform of the landing gear system for multi-wheel and multi-strut aircraft. The system can do kinematic and dynamic analysis, real-time control by visual prototyping and digital models through real-time data acquisition and co-simulation.

Design and Implementation of Logistics Intelligent Management and Control Systems for Steel Enterprises

2013 ◽  
Vol 380-384 ◽  
pp. 716-721 ◽  
Author(s):  
Guan Qi Guo ◽  
Xiang Jun Su ◽  
Xiang Liu
Keyword(s):  
Real Time ◽  
Target Location ◽  
Detection System ◽  
Three Dimensional ◽  
Automatic Generation ◽  
Time Data ◽  
Information Updating ◽  
Wireless Data Acquisition ◽  
And Control ◽  
Warehouse Operations

Based on the logistics management and control system of the cold-rolled finished products, this system has realized many features, including three-dimensional positioning of the crane, a variety of real-time data collected through the RFID systems and magnet detection system and wireless data acquisition in the coil storage or out of the library or inverted treasury job process transmitted to the server, coil warehouse operations process optimization and control, forming automatically a plan and target location to crane, Prompting crane operations, real-time monitoring of crane operating, recording crane operating results, tracking and positioning of the treasury coil information, updating treasury stock coil position in real time, inquiry treasury stock and automatic generation of warehouse operations statements by teams or date or month or year, communication with ERP or MES etc. Through seamless connectivity between the crane operating system and warehouse management systems and enterprise information systems, the system can achieve precise synchronization of logistics and information flow.

scholarly journals MODELING OF PHOSPHORUS PRODUCTION PROCESSES AND DEVELOPING A MANAGEMENT STRUCTURE BASED ON GREY SYSTEMS

2021 ◽  
Author(s):  
Nigina Toktasynova ◽  
◽  
Batyrbek Suleimenov ◽  
Yelena Kulakova ◽  
◽  
...  
Keyword(s):  
Mathematical Model ◽  
Predictive Model ◽  
Real Time ◽  
General Structure ◽  
Sinter Machine ◽  
Forecast Model ◽  
Practical Significance ◽  
Time Data ◽  
Vacuum Chambers ◽  
Model Based

The agglomeration process is one of the complex, multidimensional technological processes; it takes place under conditions of a large number of disturbing influences. As a result, the amount of return during sintering reaches 40-50%. The work is devoted to the development of a mathematical model capable of predicting and controlling the sintering point based on real-time data. As the main parameters for the construction of predictive models, data measured in real time were used – the temperature in the vacuum chambers and the gas velocity determined through the measured pressure (rarefaction) in the vacuum chambers. This paper describes the methodology and basic algorithms for modeling agglomeration processes, starting from the ingress of the charge into the sinter machine and ending with the production of a suitable agglomerate. The obtained curves of the developed mathematical model of temperature in vacuum chambers served as the basis for testing the forecast model based on the use of the theory of gray systems and the optimization algorithm of the "swarm of particles". Based on the developed mathematical model, a system for predicting the sintering point is constructed, which is the basis for determining the quality of the agglomerate, which will reduce the return volume during sintering. The general structure of the sinter control system based on a dynamic predictive model is also proposed. The practical significance of the developed predictive model based on the theory of gray systems is as follows: - forecast of the sintering point value of the agglomerate and synthesis of the control action based on the forecast; - the algorithm for constructing a mathematical model of the forecast can be used for any process that has the character of a "gray exponential law".

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