scholarly journals STUDY ON DYNAMIC BEHAVIOR OF A PASSIVE CONTROL SYSTEM WITH VISCO-ELASTO-PLASTIC DAMPER

2005 ◽  
Vol 70 (588) ◽  
pp. 87-94 ◽  
Author(s):  
Kazuhiko KASAI ◽  
Yuiti WATANABE ◽  
Nao MINATO
Keyword(s):  
Control System ◽  
Dynamic Behavior ◽  
Passive Control

A Virtual Verification Environment for the Sequence Control System Using VRML and JAVA

1999 ◽  
Author(s):  
Satoshi Kanai ◽  
Takeshi Kishinami
Keyword(s):  
Control System ◽  
Dynamic Behavior ◽  
State Transition ◽  
Visual Simulation ◽  
Transition Model ◽  
Simulation Tool ◽  
Object Model ◽  
State Transition Model ◽  
Implementation Method

Abstract This paper describes a visual simulation tool for reliable off-line development, verification and debugging of the control code of the Programmable Logic Controller (PLC) in the sequence control system. First, we discuss the uniform modeling method of the dynamic behavior of various components in a factory (actuators, sensors, operating panels, etc.) as the object model and state transition model. Then we propose the implementation method of the object model by VRML and JAVA. They enable us to uniformly describe the state-transition and corresponding dynamic behavior of the 3-D geometry of each object model. Moreover, we can use a standard VRML viewer which has the event-driven execution mechanism as a visual simulation tool. The effectiveness of proposed implementation and simulation is confirmed through the case study on the co-simulation of combining the component model with a real PLC.

scholarly journals Investigation of a passive control system for limiting cavitation inside turbomachinery under different operating conditions

2018 ◽  
Vol 148 ◽  
pp. 416-423 ◽  
Author(s):  
T. Capurso ◽  
G. Menchise ◽  
G. Caramia ◽  
S.M. Camporeale ◽  
B. Fortunato ◽  
...  
Keyword(s):  
Control System ◽  
Passive Control ◽  
Operating Conditions

scholarly journals Review on vibration control in tall buildings: from the perspective of devices and applications

2020 ◽  
Author(s):  
BG Kavyashree ◽  
Shantharam Patil ◽  
Vidya S. Rao
Keyword(s):  
Control System ◽  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Hybrid Control ◽  
Tall Buildings ◽  
Effective Control ◽  
Earthquake Load ◽  
History Of ◽  
External Loads

AbstractPermanent construction has evolved from the Palaeolithic age to today’s skyscrapers. Constructing the structure, which promises occupants safety, has become a concern because of the uncertainties in nature. Therefore in recent years, attention has been given to the development of structural protective devices that could take care of the external loads. Structural control against the wind and earthquake load has been seriously studied where the structure behaves differently for wind and earthquake load has been briefly discussed in this paper. Initially, paper discusses the history of the construction and the passive control system, which was used in structural control, is briefly discussed in this paper. Also, the implementation of active control has been discussed which was introduced later in the structural control for more effective control. But the limitations of the passive and active control system have introduced semi-active control and also the hybrid control strategy. The two mechanisms are put together in the semi-active and hybrid system to obtain all advantages of the algorithm along with overcoming their limitations. The review also briefs about stochastic vibrational control of the structure where randomness is considered in external loads, parameter of the system and also in the external devices which are implemented in the structural control. As construction sector is a complex system, big data analysis, a new field in structural control system is discussed and future scope is also mentioned.

Analysis on Safety System Operating Characteristic of SCWR

2016 ◽  
Author(s):  
Liang Liu ◽  
Tao Zhou ◽  
Jie Chen ◽  
Ali Shahzad Muhammad ◽  
Juan Chen ◽  
...  
Keyword(s):  
Control System ◽  
Passive Control ◽  
Harmonic Oscillation ◽  
Pressure Control ◽  
Safety System ◽  
Operating Characteristics ◽  
Safety Control ◽  
Passive Safety Systems ◽  
Pressure Control System ◽  
Safety Systems

In this paper, operating characteristics of the safety system of Chinese Supercritical Water-cooled Reactor (CSR1000) is described. Selecting CSR1000 as the focus of research, and it’s active and passive safety systems are analyzed in turn. A comparison is given between these two types of safety systems. Henceforth, the features of the safety control systems of CSR1000 are obtained. The results show that for the active systems, the control speed of the pressure control system is the fastest and that of the power control system is the slowest. It is observed that the active control system exhibits simple harmonic oscillation. On the other hand, the control feature of passive control system is stable. In addition, coupling the safety systems can ensure the safety of CSR1000 in the event of a loss of flow accident (LOFA).

scholarly journals MIMO Passive Control Systems Are Not Necessarily Robust

2015 ◽  
Vol 2015 ◽  
pp. 1-6
Author(s):  
Jesús U. Liceaga-Castro ◽  
Irma I. Siller-Alcalá ◽  
Eduardo Liceaga-Castro ◽  
Luis A. Amézquita-Brooks
Keyword(s):  
Control System ◽  
Structure Function ◽  
Control Systems ◽  
Passive Control ◽  
Linear Control System ◽  
Linear Control ◽  
Single Input Single Output ◽  
Single Output ◽  
Single Input

Via several cases of study it is shown that a passive multivariable linear control system, contrary to its single input single output counterpart, may not be robust. Moreover, it is shown that lack of robustness can be exposed via the multivariable structure function.

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