scholarly journals Design and Evaluation of an Overload Control System for Crisis-RelatedWeb Server Systems

2006 ◽  
Author(s):  
M. Andersson ◽  
M. Host ◽  
Jianhua Cao ◽  
C. Nyberg ◽  
M. Kihl
Keyword(s):  
Control System ◽  
Overload Control ◽  
Server Systems

Research on Accessibility of Integral Sliding Mode Contorl of Missile System

2011 ◽  
Vol 66-68 ◽  
pp. 212-216
Author(s):  
Wen Guang Zhang ◽  
Jun Wei Lei ◽  
Ling Ling Wang
Keyword(s):  
Control System ◽  
Transfer Function ◽  
Sliding Mode Control ◽  
Sliding Mode ◽  
Control Law ◽  
Overload Control ◽  
Function Type ◽  
Dynamic Coefficients ◽  
Missile System ◽  
Backstepping Algorithm

Considering the no uncertain air-dynamic coefficients situation, a kind of sliding mode control law, which was composed of the angle velocity and overload error, was designed for the overload control system of missile. And the accessibility of sliding mode was analyzed. What worthy pointing out is that a transfer- function-type backstepping algorithm was adopted to solve the derivative item of actuator and a novel type of control was proposed.

Dynamic Anti-Windup Design for Missile Overload Control System

2012 ◽  
Vol 236-237 ◽  
pp. 273-277 ◽  
Author(s):  
Xian Jun Shi ◽  
Hong Chao Zhao ◽  
Ke Wen Xu
Keyword(s):  
Control System ◽  
System Design ◽  
Actuator Saturation ◽  
Sliding Mode ◽  
Control System Design ◽  
Sliding Mode Controller ◽  
Overload Control ◽  
Saturation Time ◽  
Simulation Results ◽  
Saturation Phase

The former research on the overload control system of a supersonic missile didn’t consider actuator saturation. In order to reduce the windup effect caused by actuator saturation, we developed a dynamic anti-windup compensator. The overload control system design adopted a two-step approach. Firstly a sliding mode controller was designed ignoring the saturation. Secondly a dynamic anti-windup compensator was designed. It added to the control system to reduce the windup effect. It disengaged the actuator fast from saturation phase after the actuator entered saturation. Simulation results showed that the dynamic anti-windup compensator reduced 52% of saturation time of the control system. Hence the performance of the overload control system is improved effectively.

scholarly journals Overload Control System Design of a Deflectable Nose Missile

2011 ◽  
Vol 15 ◽  
pp. 402-407 ◽  
Author(s):  
Sun Xiaofeng ◽  
Gu Liangxian ◽  
Gong Chulin
Keyword(s):  
Control System ◽  
System Design ◽  
Control System Design ◽  
Overload Control

Overload Control of Supersonic Missile System

2011 ◽  
Vol 295-297 ◽  
pp. 1761-1763
Author(s):  
Yu Qiang Jin ◽  
Qiang Ma
Keyword(s):  
Control System ◽  
Linear Systems ◽  
Control Method ◽  
Pi Control ◽  
Overload Control ◽  
Classic Method ◽  
Missile System

PI control is also an old and classic method which is effective and mostly used in linear systems. In this paper, two assumptions are proposed to simplify the design of overload control system of supersonic missiles. No aero-coefficient is necessary to be known because of the adopting of PI control method.

Research on Non-Man-Made-Control Bus Anti-Overload System

2011 ◽  
Vol 127 ◽  
pp. 288-291
Author(s):  
Li Xin Meng ◽  
Xi Zhang ◽  
Jun Fei Li
Keyword(s):  
Control System ◽  
Traffic Accidents ◽  
Normal Operation ◽  
Single Chip ◽  
Overload Control ◽  
Alarm Signals ◽  
Upper Limit ◽  
Sensor Control ◽  
Set Up ◽  
And Control

Overloads in coach buses creates more possibilities to cause serious traffic accidents and bring heavy loss and injuries to our country and people. This research bases on sensor control technology and SCM (Single Chip Micyoco) technology in order to prevent people from changing its overload control system. We aim at developing an overload safety monitoring and warning control system which can count the number of passengers, send out overloading alarm signals and control the work of the engine. This system has functions that can set up upper limit of the number of passengers and show the current number. When the bus is overloading, the system will send out audible and visual alarm signals and stop the engine from starting through the engine monitoring system. When the overload is relieved and up to the upper limit, the system will automatically clear the alarm and the engine will return to its normal operation.

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

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