Development of PROFIBUS Based Control System

We designed control system for 100 MeV cyclotron, which include device layer, front end computer （FEC） layer and operator layer. This architecture is accord with standard control model of accelerator.     

Suppressing Beam Halo-chaos Using Adaptive Control

Subject of the halo-chaos control has become a key concerned issue for many important applications of high-current proton beam in recent years. In this paper, a general control idea for beam halo-chaos is introduced at first. Then two kinds of self-adapti…     

Development of PROFIBUS Based Control System

We designed control system for 100 MeV cyclotron, which include device layer, front end computer (FEC) layer and operator layer. This architecture is accord with standard control model of accelerator.     

Neural Network Adaptation Control of Beam Halo-Chaos

Neural networks (NN) are very useful for a vast array of applications because the NN have some advantages, such as adaptation ability, self-learning, self-organization and suitable for high-dimension dynamical systems. Especially self-adaptation control m…     

Neural Network Adaptation Control of Beam Halo-Chaos

Neural networks （NN） are very useful for a vast array of applications because the NN have some advantages, such as adaptation ability, self-learning, self-organization and suitable for high-dimension dynamical systems.     

Control of Halo-Chaos in Beam Transport Network

Beam halo-chaos in periodic focusing channel of high-current accelerators has become a key concerned issue because it always causes excessive radioactivity. Therefore, it is very necessary to find more effective control methods of beam halo-chaos in beam transport network. To do so, we have developed some methods in this work from a view of point.     

Control of Halo-Chaos in Beam Transport Network

Beam halo-chaos in periodic focusing channel of high-current accelerators has become a keyconcerned issue because it always causes excessive radioactivity. Therefore, it is very necessary to find more effective control methods of beam halo-chaos in beam t…     

The Design of Observatory Control System of LAMOST

This paper describes the system modelling, architecture design and implementation of the observatory control system （OCS） of the LAMOST （Large Area Multi-Object Fibre Spectroscopic Telescope）. The software-reuse technique, object-oriented technique, component and framework based software-developing methodology are used in the system architecture and implementation. The architecture of OCS is established based on a component-based layered system using many patterns such as the MVC （Model/View/Controller） and proxy. For the effective and safe exchange of commands and status between OCS and the subsystem, a unified message bus is defined and three protocols, namely a command acceptance/rejection protocol, a command execution feedback protocol and a status handling protocol, are proposed. The interface protocol between all the subsystems is defined. The full utilization of advanced computer technologies including the database, distributed computing, real-time computing, standard data exchange and expert system technologies has benefited the OCS software development.     

Design of Main Control Console Software in EAST Neutral Beam Injector’s Control System for the First Beam Line

Neutral beam injector is one of the main plasma heating and plasma current driving methods for experimental advanced superconducting tokomaks (EAST). In order to realize visual operation of EAST neutral beam injector’s control system (NBICS), main control console (MCC) is developed to work as the human–machine interface between the NBICS and physical operator. It can meet the requirements of visual control of NBICS by providing a user graphic interface. With the specific algorithms, the setup of power supply sequence is relatively independent and simple. Displaying the real-time feedback of the subsystems provides a reference for operators to monitor the status of the system. The MCC software runs on a Windows system and uses C++ language code while using client/server (C/S) mode, multithreading and cyclic redundancy check technology. The experimental results have proved that MCC provides a stability and reliability operation of NBICS and works as an effective man–machine interface at the same time.     

Out-of-pile Hydraulic Stability Test of CARR Control Rod Assembly

The CARR control rod assembly consists of the neutron absorber, the fuel follower, and the drivingstructure which are linked each other by the linking latches as shown in Fig. 1. The out-of-pile hydraulic stability test of control rod assembly has been done in order to examine     

Control System of Neutral Beam Injection on HT-7

Neutral Beam Injection control system (NBICS) is constructed to measure the plasma current, Magnet current, vacuum pressure, cryopump temperature, control water cooling, filament voltage, and power supply， etc. The NBICS, consisting mainly of a Programmable Logic Controller (PLC) subsystem, data acquisition and processing subsystem and cryopump and vacuum pressure monitoring subsystem, has successfully been used on a NBI device. In this article, the design of NBICS on HT-7 is discussed and each subsystem is described in particular.In addition, some experimental results are reported which are very important data for further research related to the HT-7 tokamak.     

Impulsive Stabilization of Uncertain Dynamical Systems and Chaos Control

Chaos control and synchronization have received significant attention. Impulsive control is one of main methods among them and arises in a wide variety of applications except at chaotic systems, such as orbital transfer of satellites, ecosystems managemen…     

CompactPCI／Linux Platform in FTU Slow Control System

In large fusion experiments, such as tokamak devices, there is a common trend for slow control systems. Because of complexity of the plants, the so-called ‘Standard Model‘ (SM) in slow control has been adopted on several tokamak machines. This model is based on a three-level hierarchical control: 1) High-Level Control (HLC) with a supervisory function; 2) Medium-Level Control (MLC) to interface and concentrate I/O field equipments; 3) Low-Level Control (LLC) with hard real-time I/O function, often managed by PLCs. FTU control system designed with SM concepts has underwent several stages of developments in its fifteen years duration of runs. The latest evolution was inevitable, due to the obsolescence of the MLC CPUs, based on VME-MOTOROLA 68030 with OS9 operating system. A large amount of C code was developed for that platform to route the data flow from LLC, which is constituted by 24 Westinghouse Numalogic PC-700 PLCs with about 8000 field-points, to HLC, based on a commercial Object-Oriented Real-Time database on Alpha/CompaqTru64 platform. Therefore, we have to look for cost-effective solutions and finally a CompactPCI-Intel x86 platform with Linux operating system was chosen. A software porting has been done, taking into account the differences between OS9 and Linux operating system in terms of Inter/NetworkProcesses Communications and I/O multi-ports serial driver. This paper describes the hardware/software architecture of the new MLC system, emphasizing the reliability and the low costs of the open source solutions. Moreover, a huge amount of software packages available in open source environment will assure a less painful maintenance, and will openthe way to further improvements of the system itself.     

Impulsive Stabilization of Uncertain Dynamical Systems and Chaos Control

Chaos control and synchronization have received significant attention. Impulsive control is one of main methods among them and arises in a wide variety of applications except at chaotic systems, such as orbital transfer of satellites, ecosystems management and control of money supply in a financial market.     

Control rod drive for high temperature gas cooled reactor

This control rod drive is developed for HTR-10 high temperature gas cooled test reactor.The stepmotor is prefered to improve positioning of the control rod and the scram behavior.The preliminary test in 1600170 ambient temperature shows that the selected stepmotor and transmission system can meet the main operation function requirements of HTR-10.     

Soliton Control Method for Beam Halo-Chaos in Periodic Focusing Channel

Recently, we have proposed the soliton controller of strong nonlinear and stability for controlling the halo-chaos in a quadrupole focusing system, which is another type of PFC. Based on the particle-core model, main idea of the soliton control is follows…     

Remote Control for the HT-7 Distributed Data Acquisition System

HT-7 is the first superconducting tokamak device for fusion research in China. Many experiments have been done in the machine since 1994, and lots of satisfactory results have been achieved in the fusion research field on HT-7 tokamak^[1]. With the development of fusion research, remote control of experiment becomes more and more important to improve experimental efficiency and expand research results. This paper will describe a RCS (Remote Control System),the combined model of Browser/Server and Client/Server, based on Internet of HT-7 distributed data acquisition system (HT7DAS). By means of RCS, authorized users all over the world can control and configure HT7DAS remotely. The RCS is designed to improve the flexibility, opening, reliability and efficiency of HT7DAS. In the paper, the whole process of design along with implementation of the system and some key items are discussed in detail. The System has been successfully operated during HT-7 experiment in 2002 campaign period.