Research On The Display-Control System For The Underwater Platform

This paper is based on the Twelfth-Five-Year-Plan Significant Large-ScaleUnderwater-Test-Platform Projects. Each of the platform’s four corners is fixed by ananchor which is controlled by a mooring winch and a tensing winch. The winches aredriven by the hydraulic motor to keep the platform’s balance. The tracing winch pulls thecar which traces its way on the platform until the car reaches a speed to complete thespecified test. For the test platform works in150-meter-deep sea, it becomes a problem toobserve the real-time work status of the underwater platform. The goal of the study is todevelop a necessary display-control system for the underwater test platform.The display-control system which is a network-based distributed system is animportant part the platform. And it is the data processing center and monitor-displaysystem. The study ensures a right real-time control over the whole test platform. Thepaper makes a detailed discuss and research in the following aspects:1) This paper designs of the display-control system’s hardware architecture. Thereare two methods for the network communication―Profibus serial communication andEthernet communication. Then we have an analysis and comparison the features of thetwo methods with each other.2) The display-control system’s software architecture is designed, which is dividedinto two parts―the foreground-display system and background data management system,and four modules―the network communication, the data processing, the real-timethree-dimensional simulation and the backgroud data management according to thefunctions.3) TCP/IP-based software of the display-control system is developed, whichperforms a stable communication. For complexity in processing data, the read-write question problem in communication and the analysis and data is solved successfully by amulti-thread implementation. At the end, the paper elaborates in detail on how toestablish real-time3D simulation with VC++and OpenGL and introduces the algorithm,“the mid-point-approximation”, to solve the "data vacuum" problem due to theinconsistency between the procedural clock and the data-transmission clock.4) The software of the background data management system is developed.Finally, after testing, we got some ideal simulation results, and the data managementsystem worked steadily. The results show that this system has provided one highlyeffective way for observing the work status the submarine platform.