Special Issue on Sustainable Design for Hydraulic Systems

2012 ◽  
Vol 6 (4) ◽  
pp. 409-409
Author(s):  
Yutaka Tanaka ◽  
Hiroshi Yoshinada
Keyword(s):  
Power Systems ◽  
Industrial Development ◽  
New Technologies ◽  
Sustainable Design ◽  
Industrial Applications ◽  
Fluid Power ◽  
Hydraulic Systems ◽  
Human Beings ◽  
Special Issue ◽  
Water Hydraulics

Given the high human impact on the environment, whether intentional or not, the world now faces a situation in which industrial development cannot proceed further without harmony among human beings and the environment. Hydraulic technologies have matured in the last decade and new technologies have emerged related to information technology, energy saving, mechatronics, and water hydraulics. It is our view that innovations in hydraulic technology involving sustainable design for hydraulic systems are essential for sustainably developing fluid power technology. One reason for this special issue on Sustainable Design for Hydraulic Systems is to encourage incremental breakthroughs in research based upon existing foundations. Another reason is to expand coordination and cooperation among academic and industrial researchers and institutions to realize these innovations. This special issue covers recent developments in hydraulic technologies, including water hydraulics and functional fluids, basic research, applications and case studies. State-of-the-art papers on hydraulic systems and components place special emphasis on industrial applications and their engineering background. All of the papers in this special issue are of great interest and value in sustainably designing fluid power systems, and we are sure that these papers will contribute much to the further development of fluid power technology. We sincerely thank the authors for their submissions and the reviewers for their invaluable efforts, without which this special issue would not have been possible. We are most grateful to all who have contributed their time and effort to ensuring the success of this special issue.

Mathematical Modeling of Pulsation Dampeners in Fluid Power Systems

2007 ◽  
Author(s):  
Shanzhong Duan ◽  
Mutasim E. Gamal
Keyword(s):  
Power Systems ◽  
New Technologies ◽  
New Method ◽  
Fluid Power ◽  
Pipeline System ◽  
Hydraulic Circuit ◽  
Modeling And Analysis ◽  
Fluid Resistance ◽  
Fluid Systems ◽  
Fluid Power Systems

This paper presents a new method for computer-aided modeling and analyzing of pulsation dampeners used in fluid power systems for vibration reduction. The pulsation dampeners are widely used in various fluid power systems to reduce vibration induced by power pumps. The vibration induced by power pumps in fluid systems may be severe enough to cause the damage of components in pipelines if a pulsation dampener is not installed. However, the current methods used in industries for the design and analysis of the dampeners are manually experience-orientated procedures. They are not adaptable to new technologies. The new modeling method will efficiently automate and improve the current modeling and analysis procedure of various pulsation dampeners with a minimum user effort. The proposed method is a result of utilizing the analogy between electrical circuits and hydraulic circuits. In the new method, a spherical pulsation dampener can be equivalent to a lumped hydraulic circuit installed in a distributed fluid pipeline system. The new method has been developed from the authors’ previous work of an impedance-based model in which only the effect of capacitance and inductance was considered without fluid resistance. In reality, the influence of fluid resistance is significant. This paper will take fluid resistance into considerations and form a resistance-impedance-based model.

Modeling and Analysis of Spherical Pulsation Dampeners in Fluid Power Systems

2007 ◽  
Author(s):  
Shanzhong Duan ◽  
Mutasim E. Gamal
Keyword(s):  
Power Systems ◽  
New Technologies ◽  
Vibration Reduction ◽  
New Method ◽  
Fluid Power ◽  
Pipeline System ◽  
Modeling And Analysis ◽  
Fluid Systems ◽  
Computer Aided ◽  
Fluid Power Systems

This paper presents a new method for computer-aided modeling and analyzing of pulsation dampeners used in fluid power systems for vibration reduction. The pulsation dampeners are widely used in various fluid power systems to reduce vibration induced by power pumps. The vibration induced by power pumps in fluid systems may be severe enough to cause the damage of components in pipelines if a pulsation dampener is not installed. However, the current methods used in industries for the design and analysis of the dampeners are manually experience-orientated procedures. They are not adaptable to new technologies. The new modeling method will efficiently automate and improve the current modeling and analysis procedure of various pulsation dampeners with a minimum user effort. The proposed method is a result of utilizing the analogy between electrical circuits and hydraulic circuits. In the new method, a spherical pulsation dampener can be equivalent to a lumped hydraulic circuit installed in a distributed fluid pipeline system. In short, the new method will circumvent some obstacles and introduce new techniques for computer-aided modeling and designing of the dampeners for vibration reduction in fluid power systems.

scholarly journals Special Issue on New Technologies for Robotic Manipulators and Their Industrial Applications

2021 ◽  
Vol 15 (5) ◽  
pp. 565-566
Author(s):  
Soichi Ibaraki ◽  
Andreas Archenti
Keyword(s):  
New Technologies ◽  
Industrial Robot ◽  
Robotic Manipulators ◽  
Industrial Applications ◽  
Industrial Robots ◽  
Learning System ◽  
Smart Manufacturing ◽  
Calibration Model ◽  
Special Issue ◽  
Positioning Errors

The industrial robot is more precisely an “automatically controlled, reprogrammable, multipurpose manipulator, programmable in three or more axes, which can be either fixed in place or mobile” (ISO 8373:2012). According to the International Federation of Robotics, by 2018, more than 400,000 new units were being installed annually, and the global average robot density in the manufacturing industry was 99 robots per 10,000 employees. More than 30% of all installed robots were in the automotive industry, the biggest customer for robots. Research on measuring and calibrating, modeling, programming and controlling, and integrating systems has been conducted to give robotic manipulators a wider variety of industrial applications. This special issue covers technical and academic efforts related to new technologies that improve the accuracy and facilitate the implementation of robotic manipulators in industrial applications. The first paper, by Ibaraki et al., outlines technical issues and future research directions for the implementation of model-based numerical compensation schemes for industrial robots. The random forest method is used by Kato et al. to construct a calibration model for positioning errors and identify industrial robots’ positioning errors. A procedure for the quasi-static compliance calibration of serial articulated industrial manipulators is proposed by Theissen et al. A review of the kinematic modeling theory and a derived algorithm to identify error sources for a six-axis industrial robot are presented by Alam et al. Nagao et al. derive a forward kinematics model and identify the kinematics parameters for the calibration of a robot-type machine tool. A novel trajectory generation algorithm, including a corner smoothing method for high-speed and high-accuracy machining by industrial robots, is proposed by Tajima et al. Sato et al. study the vibration characteristics of an industrial robot and derive a mathematical model that represents the dynamic behavior of the system. In the context of smart manufacturing, a multilayer quality inspection framework including a measurement instrument and a robot manipulator is introduced by Azamfirei et al. To support mass customization and the development of reconfigurable manufacturing systems, Inoue et al. propose an autonomous mobile robotic manipulator. Yonemoto and Suwa present an adaptive manipulation procedure to establish an automated scheduling technique that flexibly responds to unforeseen events, such as machine failures. Sasatake et al. introduce a learning system that is based on a method for calculating the similarity between tools, and they test it on a robot system for doing housework. Finally, for better knowledge of the key challenges that manufacturers experience in implementing collaborative industrial robots, an industrial survey is conducted by Andersson et al. The editors sincerely appreciate the contributions of all the authors as well as the work of the reviewers. We are confident that this special issue will further encourage research and engineering work to increase our understanding and knowledge of robotic manipulators and their industrial applications.

Special Issue “Lightning Effects on Power Systems and Human Beings” (SIPDA 2015)

2017 ◽  
Vol 153 ◽  
pp. 1-2
Author(s):  
Fridolin Heidler ◽  
Alexandre Piantini ◽  
Marcos Rubinstein
Keyword(s):  
Power Systems ◽  
Human Beings ◽  
Special Issue

On Peculiar Flow Characteristics in Hydraulic Orifices

2017 ◽  
Author(s):  
Massimo Martelli ◽  
Silvia Gessi ◽  
Giorgio P. Massarotti ◽  
Pietro Marani ◽  
Luca G. Zarotti
Keyword(s):  
Power Systems ◽  
Water Distribution ◽  
Flow Characteristics ◽  
Industrial Applications ◽  
Theoretical Description ◽  
Fluid Power ◽  
Wide Field ◽  
Practical Applications ◽  
Open Questions ◽  
Piping Systems

A key component of hydraulic fluid power systems — the standard orifice and, consequently, all equivalent components — apparently has, to this day, some mysteries yet to be unveiled. Knowledge on cavitation-induced liquid flow choking or saturation, which is a well founded topic in some areas of the wide field of hydraulics, e.g. water distribution piping systems, is practically neglected when assessing the design of typical mineral-oil-based power generation and control systems, for both mobile and industrial applications. This conclusion holds true at every level of study, from the technical reference literature adopted by designers to the more popular textbooks and journal papers. Moreover, the rare works addressing the phenomenon are focused on the underlying physical mechanics, completely missing any kind of evaluation of the functional consequences, especially the need to “revise” the standard quadratic law of turbulent flow. Prompted by one of these works, a preliminary experimental activity has been carried out, aimed at determining the actual flow characteristic of standard screw-in orifices used in fluid power pilot circuits. The results confirmed the undoubted presence of flow saturation; based on that, a suitable theoretical description was developed, and some practical applications are outlined in the paper. Finally, few open questions are listed, which need to be answered.

Fabrication of Integrated Pressure-Flow-Temperature Sensor for Hydraulic Systems

2006 ◽  
Author(s):  
Charles W. Groepper ◽  
Tianhong Cui ◽  
Perry Y. Li ◽  
Kim A. Stelson
Keyword(s):  
Power Systems ◽  
Pressure Sensor ◽  
Low Cost ◽  
Performance Characteristics ◽  
Fluid Power ◽  
Fluid Temperature ◽  
Hydraulic Systems ◽  
Micro Electro Mechanical Systems ◽  
Mems Sensor ◽  
System Pressure

This work develops a low cost multi-functional micro-electro mechanical systems (MEMS) sensor for use in fluid power systems. The device is small to facilitate easy integration into fluid power components, and has the capability to sense system pressure, fluid temperature, and small pressure differences that can be correlated to flow rate. The design of each of the sensing aspects of the device is outlined, as well as their layout on the sensor die. Pressure sensing with the device is accomplished through the use of polysilicon piezoresistors, while temperature sensing is accomplished using polysilicon thermisters. The procedure necessary to fabricate prototype units is illustrated in detail, and special processes noted. Performance characteristics of prototype sensors compare well to design model predictions. The polysilicon thermister demonstrated a linearity of 2.32%, a repeatability of 0.6%, and an accuracy of 1.5°C. The differential pressure sensor demonstrated a linearity of 0.4%, a repeatability of 0.13%, and an accuracy of 3.6%. The system pressure sensor demonstrated a linearity of 0.7%, a repeatability of 0.3% and an accuracy of 4.2%. These performance characteristics prove the functionality of the device.

Computer Modelling of Aircraft Hydraulic Systems Using Bathfp

1993 ◽  
Vol 207 (2) ◽  
pp. 139-143 ◽  
Author(s):  
S P Tomlinson ◽  
D G Tilley
Keyword(s):  
Power Systems ◽  
Position Control ◽  
Computer Modelling ◽  
Fluid Power ◽  
Hydraulic Systems ◽  
Transient Time ◽  
Fuel Flow ◽  
Flight Controls ◽  
Fluid Power Systems ◽  
Areas Of Interest

The computer simulation package BATHfp has been developed at the Fluid Power Centre, University of Bath to perform transient time domain simulations of fluid power systems. Utilities are provided which allow new models to be introduced into the component database. This enables the package to be tailored to particular dedicated areas of interest such as aircraft flight controls, braking and landing gear and fuel flow systems. This paper describes the application of BATHfp to aircraft hydraulic systems. An example is taken of an electrohydraulic position control system which uses an actuator to move an aileron according to a desired schedule. Parametric variations are made to illustrate how system performance can be improved.

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.

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