Determination of maximum solar power under shading and converter faults—A prerequisite for failure-tolerant power management systems

2016 ◽  
Vol 62 ◽  
pp. 14-30 ◽  
Author(s):  
Mehdi Hosseinzadeh ◽  
Farzad Rajaei Salmasi
Keyword(s):  
Power Management ◽  
Solar Power ◽  
Management Systems

A Review of Switched Inertance Hydraulic Converter Technology

2018 ◽  
Author(s):  
Chenggang Yuan ◽  
Min Pan ◽  
Andrew Plummer
Keyword(s):  
Power Management ◽  
Energy Efficient ◽  
Control Strategies ◽  
New Technology ◽  
High Energy ◽  
Management Systems ◽  
Hydraulic Power ◽  
Controlled Systems ◽  
Hydraulic Machines ◽  
And Control

Digital hydraulics is a new technology providing an alternative to conventional proportional or servovalve-controlled systems in the area of fluid power. Research is driven by the need for highly energy efficient hydraulic machines but is relatively immature compared to other energy-saving technologies. Digital hydraulic applications, such as digital pumps, digital valves and actuators, switched inertance hydraulic converters (SIHCs) and digital hydraulic power management systems, all promise high energy efficiency. This review introduces the development of SIHCs and evaluates the device configurations, performance and control strategies that are found in current SIHC research, particularly focusing on the work being undertaken in last 15 years. The designs for highspeed switching valves are evaluated, and their advantages and limitations are discussed. This article concludes with some suggestions for the future development of SIHCs.

scholarly journals Evolution and accumulation of C-CO2 in biogenic and physiogenic aggregates of different agroecological management systems

2018 ◽  
Vol 67 (4) ◽  
pp. 494-500
Author(s):  
Luiz Alberto Silva Rodrigues Pinto ◽  
Octávio Vioratti Telles Mendonça ◽  
Celeste Queiroz Rossi ◽  
Marcos Gervasio Pereira ◽  
Fabiana Costa Barros
Keyword(s):  
Production Systems ◽  
Agroforestry System ◽  
Management Systems ◽  
Formation Pathway ◽  
No Till ◽  
Testing Parameter ◽  
Mineralizable Carbon ◽  
The City ◽  
Som Decomposition

Determination of mineralizable carbon (C) is based on the evolution of C-CO2, reflecting the activity of soil biota in soil organic matter (SOM) decomposition, and can be used as a testing parameter in agroecological production systems. The objective of the present work was to quantify mineralizable C in aggregates of different biogenic and physiogenic formation pathways in agroecological management systems in the city of Seropédica, state of Rio de Janeiro. Five sampling areas were selected: (1) 10-year agroforestry system (AFS), (2) 15-year full sun coffee (C-SUN), (3) 15-year shaded coffee (C-SHA), (4) 10-year phlegm alleles (FLE), and (5) 6-year no-till planting system with corn and eggplant (NT) in Red-Yellow Argissolo in Seropédica-RJ.Morphological patterns were used to identify the formation pathway (biogenic and physiogenic) of aggregates.  In these, fertility, total organic carbon (TOC), and total nitrogen (TN) were evaluated.  The evolution and accumulation of C-CO2were determined in the laboratory after 35 days of incubation. The NT area under agroecological management present higher C-CO2 accumulation between the systems with biogenic aggregates and less accumulation in the physiogenic aggregates. 

Quality Driven Requirements Engineering for Development of Crisis Management Systems

2012 ◽  
Vol 4 (2) ◽  
pp. 35-52 ◽  
Author(s):  
Niklas Hallberg ◽  
Sofie Pilemalm ◽  
Toomas Timpka
Keyword(s):  
Crisis Management ◽  
Requirements Engineering ◽  
Management Practices ◽  
Management Systems ◽  
Success Rates ◽  
Terror Attacks ◽  
Health Authorities ◽  
Public Health Authorities

Terror attacks and natural disasters of the past decades have dramatically made governments, public health authorities, and communities aware of insufficiencies in crisis management practices. Information technology has the potential to advance these practices, but systems that support handling these courses of events still have low success rates. The authors set out to define a requirements engineering method suitable for the development of crisis management systems (CMS). The resulting method was formatively evaluated in a project aimed at defining functions for systems supporting international engagements in crisis situations. Each step in the method was documented by its objective, output, implementation, and the experiences gained from the case study. The most important features of the method are the Voice of the Customer Table for identification of user needs, Use Cases for determination of requirements from the needs, and scenarios and prototypes for validating the requirements with user representatives.

scholarly journals Design of Solar Power Management Circuit Based on Wireless Sensor Network

2017 ◽  
Vol 13 (12) ◽  
pp. 67
Author(s):  
Jianying Shi ◽  
Yanbin Xu
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Power Management ◽  
Control Algorithm ◽  
Solar Power ◽  
Discharge Power ◽  
Wireless Sensor ◽  
Battery Charge ◽  
Point Tracking ◽  
Solar Battery

<p class="0abstract">To explore the design of solar power management circuit, the fuzzy logic control algorithm based on MPPT (max power point tracking), which has fast control speed and good environment robustness, is adopted as the control algorithm. In addition, the MPPT solar battery charge and discharge power management circuit is designed and successfully applied in the on-line measurement projects of dielectric loss of wireless sensor network in Jilin Province LG Electronics Company. The results show that the charging efficiency of solar battery charge and discharge power management circuit can reach above 80%, and the current of static power management circuit is less than 1mA. In different light intensities, the dynamic power management is intelligently carried out. At last, it is concluded that the stability and reliability of circuit are quite high.</p>

Evolution of power management systems for the 1990's

2002 ◽  
Author(s):  
J.R. Bartoletti ◽  
D.J. West ◽  
R.C. Patterson ◽  
R.G. Durso ◽  
L.J. Powell ◽  
...  
Keyword(s):  
Power Management ◽  
Management Systems
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