scholarly journals Working and Limitations of Cable Stiffening in Flexible Link Manipulators

2016 ◽  
Vol 2016 ◽  
pp. 1-9
Author(s):  
Rahul Dixit ◽  
R. Prasanth Kumar
Keyword(s):  
Energy Consumption ◽  
Finite Number ◽  
Degrees Of Freedom ◽  
Control Algorithms ◽  
Flexible Link ◽  
The Past ◽  
Working Principle ◽  
Reduce Energy Consumption ◽  
High Flexibility ◽  
Special Control

Rigid link manipulators (RLMs) are used in industry to move and manipulate objects in their workspaces. Flexible link manipulators (FLMs), which are much lighter and hence highly flexible compared to RLMs, have been proposed in the past as means to reduce energy consumption and increase the speed of operation. Unlike RLM, an FLM has infinite degrees of freedom actuated by finite number of actuators. Due to high flexibility affecting the precision of operation, special control algorithms are required to make them usable. Recently, a method to stiffen FLMs using cables, without adding significant inertia or adversely affecting the advantages of FLMs, has been proposed as a possible solution in a preliminary work by the authors. An FLM stiffened using cables can use existing control algorithms designed for RLMs. In this paper we discuss in detail the working principle and limitations of cable stiffening for flexible link manipulators through simulations and experiments. A systematic way of deciding the location of cable attachments to the FLM is also presented. The main result of this paper is to show the advantage of adding a second pair of cables in reducing overall link deflections.

Optimal Terminal Box Control Algorithms for Single Duct Air Handling Units

2008 ◽  
Author(s):  
Young-Hum Cho ◽  
Mingsheng Liu
Keyword(s):  
Energy Consumption ◽  
Thermal Conditions ◽  
Measured Data ◽  
Control Algorithms ◽  
Energy Costs ◽  
Control Functions ◽  
Air Handling Units ◽  
Waste Energy ◽  
Operation Control ◽  
Reduce Energy Consumption

Terminal boxes are one of the major building HVAC components and directly impact building room comfort and energy costs. Current terminal boxes may cause occupant discomfort and waste energy if they have inappropriate operation control functions. The objective of this study is to develop and implement applicable optimal terminal box control algorithms. The thermal conditions and energy consumption are compared between conventional and improved control algorithms using measured data. The results of this study show that optimal terminal box control algorithms can stably maintain the set room air temperature and reduce energy consumption compared to conventional control algorithms.

A General Approach for Dynamic Positioning Weathervane Control

2013 ◽  
Vol 47 (2) ◽  
pp. 31-42 ◽  
Author(s):  
Michel R. Miyazaki ◽  
Eduardo A. Tannuri
Keyword(s):  
Energy Consumption ◽  
Control Theory ◽  
Environmental Conditions ◽  
Energy Efficient ◽  
Degrees Of Freedom ◽  
Control Point ◽  
Effective Control ◽  
Dynamic Positioning ◽  
Control Methods ◽  
Reduce Energy Consumption

AbstractEnergy efficient controllers for dynamic positioning (DP) systems are a possible approach to reduce energy consumption and CO2 emission on large offshore systems. Due to the flexibility of some DP operations, it is possible to change the vessel heading in order to align with the resultant force defined by the environmental conditions, reducing the thrust and power required to keep position, thus increasing station-keeping capability. However, online calculation of the optimum heading may not be possible because of uncertainties about wave and current intensity and direction. Moreover, these factors change through time, and the system must be able to adapt to those changes and to keep the optimum positioning. This paper presents a new methodology to define the heading setpoint based on zero power control theory. This methodology has important advantages over traditional weathervane control methods, such as an effective control of all horizontal degrees of freedom of the vessel and the possibility to define any reference control point, not only points located at the vessel bow.

scholarly journals Application of green building materials in the field of construction and sustainable development

2021 ◽  
Vol 308 ◽  
pp. 01001
Author(s):  
Yuxuan Hu ◽  
Jue Wang ◽  
Xueru Wang
Keyword(s):  
Sustainable Development ◽  
Energy Consumption ◽  
Building Materials ◽  
Foam Glass ◽  
Green Building ◽  
Research Process ◽  
The Past ◽  
Green Building Materials ◽  
Green Walls ◽  
Reduce Energy Consumption

Green building materials are a new category. Compared with the past building materials, ideal building materials have a series of characteristics such as reducing energy consumption, reducing emissions, saving resources, and being recyclable, which makes them become an important reference for sustainable development. This article focuses on foam glass, green walls, and ecological cement. During the research process, it was found that foam glass has better characteristics than ordinary glass, and less waste is generated during the production process, which reduces pollution; The green wall can not only reduce energy consumption, but also absorb harmful substances, and the plant exterior wall can also make people comfortable; Ecological cement can be made from waste materials, which greatly saves resources and realizes recycling. In short, green building materials are an important method to achieve sustainable development and will certainly play an important role in the future construction field.

Solar Energy, Methane, China Kang Integrated System Design

2013 ◽  
Vol 732-733 ◽  
pp. 558-563
Author(s):  
Hong Guo Ren
Keyword(s):  
Energy Consumption ◽  
Solar Energy ◽  
System Design ◽  
New Technology ◽  
Integrated System ◽  
Detailed Explanation ◽  
Low Energy Consumption ◽  
Working Principle ◽  
Reduce Energy Consumption ◽  
Integrated System Design

In order to reduce energy consumption, solve the rural house of low energy consumption, integrated system is imperative under the situation of the new technology is applied to the villages and towns in energy conservation and emission reduction can therefore play a big role. This paper puts forward in the northeast area the heated kang facilities, the solar energy and methane integration, this paper introduces the integrated system design part, draw the system design, and the system's working principle and features a detailed explanation.

scholarly journals Dimensional Synthesis for Multi-Linkage Robots Based on a Niched Pareto Genetic Algorithm

Algorithms ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 203
Author(s):  
Hu Wu ◽  
Xinning Li ◽  
Xianhai Yang
Keyword(s):  
Genetic Algorithm ◽  
Energy Consumption ◽  
Principal Component ◽  
Kernel Principal Component Analysis ◽  
Dimensional Synthesis ◽  
Pareto Solution ◽  
Secondary Scattering ◽  
New Ideas ◽  
Reduce Energy Consumption ◽  
High Flexibility

The dimensional synthesis of multi-linkage robots has great significance for improving flexibility and efficiency. With the increase of the degree of freedom and restrictions on special occasions, the solution of dimensional synthesis becomes complicated and time-consuming. Theory of workspace density function, maneuverability, and energy expenditure had been studied. With high flexibility and low energy consumption as the design goal, the method for dimensional and joint angle synthesis of multi-linkage robots was proposed based on a niched Pareto genetic algorithm. The Pareto solution set has been obtained. The method was verified by two application examples, which is occlusion of the solar salt evaporation pool and the secondary scattering of solid 2,2′-azobis(2,4-dimethylvaleronitrile). Through the application of NPGA (niched Pareto genetic algorithm) compared with KPCA (kernel principal component analysis), it can save 12.37% time in occlusion of one evaporating pool and reduce energy consumption by 3.85%; it can save 9.96% time in scattering of remain materials per barrel and reduce energy consumption by 1.77%. The study reduces the labor intensity of manual workers in the salt making industry, ensures the safe production of dangerous chemicals, and provides new ideas and methods for the dimensional synthesis of multi-linkage robots.

scholarly journals Systematic and data-driven literature review of the energy and indoor environmental performance of swimming facilities

2021 ◽  
Vol 14 (7) ◽  
Author(s):  
Ole Øiene Smedegård ◽  
Bjørn Aas ◽  
Jørn Stene ◽  
Laurent Georges ◽  
Salvatore Carlucci
Keyword(s):  
Energy Consumption ◽  
Air Quality ◽  
Literature Review ◽  
Energy Use ◽  
Residential Buildings ◽  
Energy Performance ◽  
The Past ◽  
Reduce Energy Consumption ◽  
Planning And Operation ◽  
By Products

AbstractDuring the last few decades, focus on measures for energy conservation in buildings has increased considerably. The European Commission implemented the Energy Performance of Buildings Directive, which gave instructions to the member states about how to reduce energy consumption in residential and non-residential buildings. In the process of making the building sector more energy efficient, the building codes generally have become stricter with some simplifications applied in the requirements. For swimming facilities in Norway, these simplifications are undermining the purpose of the code by excluding the energy use related to the operation of swimming pools, which is the main part of the energy use in this building category. In other words, the energy use related to operation of the facility is not regulated. Furthermore, guidelines for the planning and operation of these types of facilities are outdated and research for this building category is sparse. These three aspects mean that there is a considerable potential for improvement. This paper presents a comprehensive literature review with bibliometric and thematic analyses of the contextualized research in swimming facilities from a heating, ventilation, and air-conditioning perspective. It maps the major trends during the past few decades, where areas like solar heating for outdoor pools, energy consumption, and air quality stand out. Except for air quality and disinfection by-products, research on these facilities is highly fragmented without any strong contributors to the various fields. Graphical abstract

Naval Energy Management System

2020 ◽  
Vol 26 (3) ◽  
pp. 20-25
Author(s):  
Laurențiu Bogdan Asalomia ◽  
Gheorghe Samoilescu
Keyword(s):  
Energy Consumption ◽  
Power Systems ◽  
New Technologies ◽  
Integrated Navigation ◽  
Integrated Navigation System ◽  
Efficient Management ◽  
Reduce Energy Consumption ◽  
Energy Efficiency Design Index ◽  
Green Ship

AbstractThe paper analyses the role of control and monitoring of electro-energetic equipment in order to reduce operational costs, increase profits and reduce carbon emissions. The role of SCADA and EcoStruxure Power systems is presented and analysed taking into account the energy consumption and its savings. The paper presents practical and modern solutions to reduce energy consumption by up to 53%, mass by up to 47% and increase the life of the equipment by adjusting the electrical parameters. The Integrated Navigation System has allowed an automatic control and an efficient management. For ships, the implementation of an energy efficiency design index and new technologies was required for the GREEN SHIP project.

The Research of Measuring Approach and Energy Efficiency for Hadoop Periodic Jobs

2015 ◽  
Vol 8 (1) ◽  
pp. 206-210 ◽  
Author(s):  
Yu Junyang ◽  
Hu Zhigang ◽  
Han Yuanyuan
Keyword(s):  
Energy Efficiency ◽  
Cloud Computing ◽  
Energy Consumption ◽  
Energy Saving ◽  
Energy Estimate ◽  
Cloud Platform ◽  
Periodic Tasks ◽  
Current Consumption ◽  
Reduce Energy Consumption

Current consumption of cloud computing has attracted more and more attention of scholars. The research on Hadoop as a cloud platform and its energy consumption has also received considerable attention from scholars. This paper presents a method to measure the energy consumption of jobs that run on Hadoop, and this method is used to measure the effectiveness of the implementation of periodic tasks on the platform of Hadoop. Combining with the current mainstream of energy estimate formula to conduct further analysis, this paper has reached a conclusion as how to reduce energy consumption of Hadoop by adjusting the split size or using appropriate size of workers (servers). Finally, experiments show the effectiveness of these methods as being energy-saving strategies and verify the feasibility of the methods for the measurement of periodic tasks at the same time.

Performance Analysis of Energy Efficient Opportunistic Routing Protocols in Wireless Sensor Network

2019 ◽  
Vol 09 ◽  
Author(s):  
Premkumar Chithaluru ◽  
Rajeev Tiwari ◽  
Kamal Kumar
Keyword(s):  
Energy Consumption ◽  
Routing Protocols ◽  
Energy Efficient ◽  
Data Communication ◽  
Opportunistic Routing ◽  
Link Quality ◽  
Delivery Ratio ◽  
Performance Parameters ◽  
Wireless Medium ◽  
Reduce Energy Consumption

Background: Energy Efficient wireless routing has been an area of research particularly to mitigate challenges surrounding performance in category of Wireless Networks. Objectives: The Opportunistic Routing (OR) technique was explored in recent times and exhibits benefits over many existing protocols and can significantly reduce energy consumption during data communication with very limited compromise on performance. Methods : Using broadcasting nature of the wireless medium, OR practices to discourse two foremost issues of variable link quality and unpredictable node agility in constrained WSNs. OR has a potential to reduce delay in order to increase the consistency of data delivery in network. Results : Various OR based routing protocols have shown varying performances. In this paper, a detailed conceptual and experimental analysis is carried out on different protocols that uses OR technique for providing more clear and definitive view on performance parameters like Message Success Rate, Packet Delivery Ratio and Energy Consumption.

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