As the exploration and exploitation of oil and gas proliferate throughout deepwater area, the requirements on the reliability of dynamic positioning system become increasingly stringent. The control objective ensuring...As the exploration and exploitation of oil and gas proliferate throughout deepwater area, the requirements on the reliability of dynamic positioning system become increasingly stringent. The control objective ensuring safety operation at deep water will not be met by a single controller for dynamic positioning. In order to increase the availability and reliability of dynamic positioning control system, the triple redundancy hardware and software control architectures were designed and developed according to the safe specifications of DP-3 classification notation for dynamically positioned ships and rigs. The hardware redundant configuration takes the form of triple-redundant hot standby configuration including three identical operator stations and three real-time control computers which connect each other through dual networks. The function of motion control and redundancy management of control computers were implemented by software on the real-time operating system VxWorks. The software realization of task loose synchronization, majority voting and fault detection were presented in details. A hierarchical software architecture was planed during the development of software, consisting of application layer, real-time layer and physical layer. The behavior of the DP-3 dynamic positioning control system was modeled by a Markov model to analyze its reliability. The effects of variation in parameters on the reliability measures were investigated. The time domain dynamic simulation was carried out on a deepwater drilling rig to prove the feasibility of the proposed control architecture展开更多
The integrated control system of vehicle ABS/ASR/ACC has been developed using the MC9S12DP256 single chip, which is the new Motorola 16-bit product in HSC12 family. The system including the main control module, the da...The integrated control system of vehicle ABS/ASR/ACC has been developed using the MC9S12DP256 single chip, which is the new Motorola 16-bit product in HSC12 family. The system including the main control module, the data collection module and the drive and fault diagnosis module is demonstrated and its data collection function is presented in detail. The system designed by the modularization can supervise the data, drive the valves and pump. The program can be debugged on line, which is steady and reliable validated by the large numbers of vehicle road tests.展开更多
针对远程控制系统难以实现和控制效果不理想的问题,提出了一种基于OPC(OLEfor Process Control)和Profibus-DP总线的远程控制实现方法。建立了以太网和Profibus-DP现场总线两层网络的双水箱液位控制装置实验平台,给出了基于OPC和Profibu...针对远程控制系统难以实现和控制效果不理想的问题,提出了一种基于OPC(OLEfor Process Control)和Profibus-DP总线的远程控制实现方法。建立了以太网和Profibus-DP现场总线两层网络的双水箱液位控制装置实验平台,给出了基于OPC和Profibus-DP总线的远程控制系统框图和控制原理。系统通过Profibus-DP总线实现现场设备的数据实时采集,并传递给SI-MATIC NETOPC服务器,客户端MCGS获取OPC服务器的实时数据,利用Matlab实现BP神经网络优化PID控制参数,优化后的参数通过SIMATIC NET OPC服务器传递给Profibus-DP总线控制系统,实现远程控制。实验结果表明,提出的远程控制方法有效,具有较好的控制效果。展开更多
基金supported by the National Natural Science Foundation of China (Grant No. 50909025)the National High Technology Development Program of China (Grant No. 2008AA092301)
文摘As the exploration and exploitation of oil and gas proliferate throughout deepwater area, the requirements on the reliability of dynamic positioning system become increasingly stringent. The control objective ensuring safety operation at deep water will not be met by a single controller for dynamic positioning. In order to increase the availability and reliability of dynamic positioning control system, the triple redundancy hardware and software control architectures were designed and developed according to the safe specifications of DP-3 classification notation for dynamically positioned ships and rigs. The hardware redundant configuration takes the form of triple-redundant hot standby configuration including three identical operator stations and three real-time control computers which connect each other through dual networks. The function of motion control and redundancy management of control computers were implemented by software on the real-time operating system VxWorks. The software realization of task loose synchronization, majority voting and fault detection were presented in details. A hierarchical software architecture was planed during the development of software, consisting of application layer, real-time layer and physical layer. The behavior of the DP-3 dynamic positioning control system was modeled by a Markov model to analyze its reliability. The effects of variation in parameters on the reliability measures were investigated. The time domain dynamic simulation was carried out on a deepwater drilling rig to prove the feasibility of the proposed control architecture
基金Ford-China Research and Development Fund Project(50122148)
文摘The integrated control system of vehicle ABS/ASR/ACC has been developed using the MC9S12DP256 single chip, which is the new Motorola 16-bit product in HSC12 family. The system including the main control module, the data collection module and the drive and fault diagnosis module is demonstrated and its data collection function is presented in detail. The system designed by the modularization can supervise the data, drive the valves and pump. The program can be debugged on line, which is steady and reliable validated by the large numbers of vehicle road tests.
文摘针对远程控制系统难以实现和控制效果不理想的问题,提出了一种基于OPC(OLEfor Process Control)和Profibus-DP总线的远程控制实现方法。建立了以太网和Profibus-DP现场总线两层网络的双水箱液位控制装置实验平台,给出了基于OPC和Profibus-DP总线的远程控制系统框图和控制原理。系统通过Profibus-DP总线实现现场设备的数据实时采集,并传递给SI-MATIC NETOPC服务器,客户端MCGS获取OPC服务器的实时数据,利用Matlab实现BP神经网络优化PID控制参数,优化后的参数通过SIMATIC NET OPC服务器传递给Profibus-DP总线控制系统,实现远程控制。实验结果表明,提出的远程控制方法有效,具有较好的控制效果。
