Short-term airing by natural ventilation - modeling and control strategies

Indoor Air ◽  
2009 ◽  
Vol 19 (5) ◽  
pp. 357-380 ◽  
Author(s):  
M. Perino
Keyword(s):  
Natural Ventilation ◽  
Control Strategies ◽  
Short Term ◽  
Modeling And Control ◽  
And Control

Dynamics modeling and control of active track tensioning system for tracked vehicle

2019 ◽  
Vol 26 (11-12) ◽  
pp. 989-1000
Author(s):  
Pingxin Wang ◽  
Xiaoting Rui ◽  
Hailong Yu ◽  
Bo Li
Keyword(s):  
Control Strategies ◽  
Stable Range ◽  
Dynamics Modeling ◽  
Modeling And Control ◽  
Flow Equations ◽  
Ground Pressure ◽  
Coupling System ◽  
Hydraulic Mechanism ◽  
And Control ◽  
Peak Value

Track assemblies are widely used to reduce vehicles’ ground pressure and improve their off-road performance. During off-road, the track tension has a significant effect on the performance of the crawler driving system. Previous control strategies only make use of the motions of partial road wheels. This paper develops a logical improvement to govern the motion of the track tensioner by using all road wheels. First, a dynamic model of the hydraulic-mechanism coupling system is established using the transfer matrix method for multibody systems and pressure-flow equations. Then, in order to get the angle of the idler arm, a modeling method of wheel envelope perimeter is developed, which is based on the locations of all wheels. Simulation results indicate that the control system maintains the wheel envelope perimeter almost constant while road wheels swing and decrease the possibility of peel-off and breakage of the track. It alleviates the track repeated stretch and keeps the tension in a stable range to reduce the fatigue damage. The control strategy can effectively reduce the peak value of the upper track tension during a vehicle passing through obstacles. This study suggests that the active track tensioning system can be implemented to improve the driving properties of tracked vehicles.

scholarly journals Progress in Modeling and Control of Gas Turbine Power Generation Systems: A Survey

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2358 ◽  
Author(s):  
Omar Mohamed ◽  
Ashraf Khalil
Keyword(s):  
Power Generation ◽  
Gas Turbine ◽  
Gas Turbines ◽  
Power Plants ◽  
Control Strategies ◽  
Research Area ◽  
Future Research ◽  
Modeling And Control ◽  
Comprehensive Survey ◽  
And Control

This paper reviews the modeling techniques and control strategies applied to gas turbine power generation plants. Recent modeling philosophies are discussed and the state-of-the-art feasible strategies for control are shown. Research conducted in the field of modeling, simulation, and control of gas turbine power plants has led to notable advancements in gas turbines’ operation and energy efficiency. Tracking recent achievements and trends that have been made is essential for further development and future research. A comprehensive survey is presented here that covers the outdated attempts toward the up-to-date techniques with emphasis on different issues and turbines’ characteristics. Critical review of the various published methodologies is very useful in showing the importance of this research area in practical and technical terms. The different modeling approaches are classified and each category is individually investigated by reviewing a considerable number of research articles. Then, the main features of each category or approach is reported. The modern multi-variable control strategies that have been published for gas turbines are also reviewed. Moreover, future trends are proposed as recommendations for planned research.

scholarly journals Recent Advances in Bidirectional Modeling and Structural Control

2016 ◽  
Vol 2016 ◽  
pp. 1-17 ◽  
Author(s):  
Satyam Paul ◽  
Wen Yu ◽  
Xiaoou Li
Keyword(s):  
Control Systems ◽  
Structural Control ◽  
Seismic Waves ◽  
Control Strategies ◽  
Optimal Placement ◽  
Modeling And Control ◽  
Control Devices ◽  
Identification Techniques ◽  
And Control ◽  
Bidirectional Modeling

This paper provides an overview of building structure modeling and control under bidirectional seismic waves. It focuses on different types of bidirectional control devices, control strategies, and bidirectional sensors used in structural control systems. This paper also highlights the various issues like system identification techniques, the time-delay in the system, estimation of velocity and position from acceleration signals, and optimal placement of the sensors and control devices. The importance of control devices and its applications to minimize bidirectional vibrations has been illustrated. Finally, the applications of structural control systems in real buildings and their performance have been reviewed.

scholarly journals Grinding in Ball Mills: Modeling and Process Control

2012 ◽  
Vol 12 (2) ◽  
pp. 51-68 ◽  
Author(s):  
Vladimir Monov ◽  
Blagoy Sokolov ◽  
Stefan Stoenchev
Keyword(s):  
Process Control ◽  
Control Strategies ◽  
Grinding Process ◽  
Ball Mills ◽  
Modeling And Control ◽  
Energy Models ◽  
And Control

Abstract The paper presents an overview of the current methodology and practice in modeling and control of the grinding process in industrial ball mills. Basic kinetic and energy models of the grinding process are described and the most commonly used control strategies are analyzed and discussed.

Afterword IV Case studies

2018 ◽  
Author(s):  
Benjamin Roche ◽  
Hélène Broutin ◽  
Frédéric Simard
Keyword(s):  
Low Income ◽  
Evolutionary Ecology ◽  
Control Strategies ◽  
Buruli Ulcer ◽  
Host Population ◽  
Low Income Countries ◽  
Transmission Control ◽  
Short Term ◽  
The One ◽  
And Control

Through malaria elimination in Italy at the end of 19th century (when the epidemiological situation could be seen as similar to the one present in low-income countries today) and control strategies against Buruli ulcer and schistosomiasis in Africa, we have shown examples demonstrating that the translation of evolutionary ecology knowledge to infectious diseases control in low-income countries can be successful. These successes have reached different stages, from increasing our understanding of the whole infectious system dynamics toward implementation of innovative control strategies in the short term (Buruli ulcer), to improving transmission control by reducing abundance of host population (schistosomiasis in Senegal), as well as ensuring complete disease elimination locally, through a combination of massive reduction of vector populations at key periods and human-population protection and education (malaria in Italy)....

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