Seismic protection of structures by smart passive control system using “regional algorithms”

2014 ◽  
Author(s):  
Giuseppe Maddaloni ◽  
Antonio Occhiuzzi
Keyword(s):  
Control System ◽  
Passive Control ◽  
Seismic Protection

MR damper-based smart passive control system for seismic protection of building structures

2006 ◽  
Author(s):  
Hyung-Jo Jung ◽  
Kang-Min Choi ◽  
Ji-Eun Jang ◽  
Sang-Won Cho ◽  
In-Won Lee
Keyword(s):  
Control System ◽  
Passive Control ◽  
Mr Damper ◽  
Seismic Protection ◽  
Building Structures

Passive control system for seismic protection of a multi-tower cable-stayed bridge

2014 ◽  
Vol 6 (5) ◽  
pp. 495-514 ◽  
Author(s):  
Fangfang Geng ◽  
Youliang Ding ◽  
Jianyong Song ◽  
Wanheng Li ◽  
Aiqun Li
Keyword(s):  
Control System ◽  
Passive Control ◽  
Seismic Protection ◽  
Cable Stayed Bridge

Seismic protection of base isolated structures using smart passive control system

2007 ◽  
Vol 3 (3) ◽  
pp. 385-403 ◽  
Author(s):  
Hyung-Jo Jung ◽  
Kang-Min Choi ◽  
Kyu-Sik Park ◽  
Sang-Won Cho
Keyword(s):  
Control System ◽  
Passive Control ◽  
Seismic Protection ◽  
Isolated Structures

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).

Passive Control Techniques for Seismic Protection of Chemical Plants

2020 ◽  
Author(s):  
Keisuke Minagawa ◽  
Fabrizio Paolacci
Keyword(s):  
Passive Control ◽  
Base Isolation ◽  
Seismic Damage ◽  
Pressure Vessels ◽  
Chemical Plant ◽  
Seismic Protection ◽  
Economic Losses ◽  
Chemical Plants ◽  
Northridge Earthquake ◽  
Control Techniques

Abstract Seismic damage of chemical plant facilities (pressure vessels, piping, storage tanks, etc..) can causes human and economic losses as well as heavy environmental damages. Therefore, it is of paramount importance to reduce such a consequences. The passive control techniques (PCT) as dampers or base isolation can represent an effective technique to mitigate the major damage caused by earthquakes. Viscous dampers, tuned mass dampers and base isolators are well-known passive control devices successfully applied to civil structures, as demonstrated during the last big events as Northridge earthquake in 1994, the Kobe earthquake in 1995, the Great East Japan earthquake in 2011. The scarce application to major hazard industrial facilities as chemical plants poses some questions, including the selection of suitable devices, their real applicability and effectiveness, because of the strict requirements of chemical plant equipment in terms of safety and business continuity. Therefore, this study aim at analyzing the possible applications of the most renew passive control techniques for seismic protection for chemical plant components. In this respect, a complete review of typical seismic damage of industrial (chemical) facilities and the investigation of the applicability of PCT as mitigation strategy is offered for all possible structural typologies of units presents in a plant.

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.

Sign in / Sign up

Export Citation Format

Share Document