Towards the “Green Tribology”: Biomimetic Surfaces, Biodegradable Lubrication, and Renewable Energy

2010 ◽  
Author(s):  
Michael Nosonovsky ◽  
Bharat Bhushan
Keyword(s):  
Renewable Energy ◽  
Experimental Research ◽  
Theoretical Modeling ◽  
Experimental Results ◽  
The Novel ◽  
Environment Friendly ◽  
Biomimetic Surfaces ◽  
Areas Of Interest ◽  
Green Tribology

The Green Tribology is a new concept that was suggested in 2009. We discuss the scope of the new discipline and the publications on Green Tribology which are to appear in 2010 and 2011. The three areas relevant to Green Tribology are: (i) biomimetic and self-lubricating materials / surfaces (ii) biodegradable and environment-friendly lubricants (iii) tribology of renewable and/or sustainable sources of energy. The hypothesis is that these three areas can benefit from each other and, therefore, it is justified to combine these three areas into the novel field of Green Tribology. We discuss recent theoretical, modeling, and experimental research in these areas of interest and present theoretical, modeling, and experimental results in the area of environment-friendly tribology.

Towards “Green Tribology”: Self-Organization at the Sliding Interface for Biomimetic Surfaces

2010 ◽  
Author(s):  
Michael Nosonovsky
Keyword(s):  
Self Organization ◽  
Solar Panels ◽  
Environmental Aspects ◽  
Environment Friendly ◽  
Biomimetic Surfaces ◽  
Tidal Turbines ◽  
Biological Impacts ◽  
Living Nature ◽  
Surface Modification Techniques ◽  
Green Tribology

“Green tribology” is the concept that was introduced in 2009 by the founder of Tribology, Prof. P. Jost, who defined it as “the science and technology of the tribological aspects of ecological balance and of environmental and biological impacts.” This includes tribological technology that mimics living nature (biomimetic surfaces) and thus is expected to be environment-friendly, the control of friction and wear that is of importance for energy conservation and conversion, environmental aspects of lubrication and surface modification techniques, and tribological aspects of green applications such as the wind-power turbines, tidal turbines, or solar panels. It is clear that a number of tribological problems could be put under the umbrella of “green tribology” and is of mutual benefit to one another. Biomimetic applications are of particular interest for the Green Tribology, because of their environment-friendliness. Nosonovsky and Bhushan suggested the “12 principles of the Green Tribology.” The common feature in various biomimetic surfaces is their hierarchical structure and the ability for self-organization. I will discuss the principles of self-organization in hierarchical tribological systems on the basis of the concepts of the non-equilibrium thermodynamics (the Onsager formalism). In particular, I will show that the thermodynamic approach in tribology can yield new and practically important results.

scholarly journals Identification of the State of Electrical Appliances with the Use of a Pulse Signal Generator

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 673
Author(s):  
Augustyn Wójcik ◽  
Piotr Bilski ◽  
Robert Łukaszewski ◽  
Krzysztof Dowalla ◽  
Ryszard Kowalik
Keyword(s):  
Measurement System ◽  
Cross Correlation ◽  
Pulse Signal ◽  
Signal Generator ◽  
Experimental Results ◽  
The Novel ◽  
End User ◽  
Standard Classification ◽  
Electrical Appliance

The paper presents the novel HF-GEN method for determining the characteristics of Electrical Appliance (EA) operating in the end-user environment. The method includes a measurement system that uses a pulse signal generator to improve the quality of EA identification. Its structure and the principles of operation are presented. A method for determining the characteristics of the current signals’ transients using the cross-correlation is described. Its result is the appliance signature with a set of features characterizing its state of operation. The quality of the obtained signature is evaluated in the standard classification task with the aim of identifying the particular appliance’s state based on the analysis of features by three independent algorithms. Experimental results for 15 EAs categories show the usefulness of the proposed approach.

Research on a Novel Miniature Air Compressor Generating both Compressed Air and Vacuum

2014 ◽  
Vol 1027 ◽  
pp. 253-256
Author(s):  
Jian Hai Han ◽  
Jie Zhang ◽  
Dong Liao Fu ◽  
Zhi Gang Hu
Keyword(s):  
Vacuum Pump ◽  
Operating Principle ◽  
Experimental Results ◽  
System Structure ◽  
Compressed Air ◽  
The Novel ◽  
Pump Mode ◽  
Air Compressor

A new kind of miniature air compressor is proposed in this paper. This compressor can produce both compressed air and vacuum. The system structure, operating principle and experimental characteristics of the novel miniature air compressor are described in detail. The experimental results prove that the shift between air compressor mode and vacuum pump mode is possible and the design of system structure is appropriate.

Divalent Surfactants. Experimental Results and Theoretical Modeling of Surfactant/Water Phase Equilibria

Langmuir ◽  
1994 ◽  
Vol 10 (7) ◽  
pp. 2177-2187 ◽  
Author(s):  
Haakan Hagslaett ◽  
Olle Soederman ◽  
Bengt Joensson
Keyword(s):  
Phase Equilibria ◽  
Theoretical Modeling ◽  
Experimental Results ◽  
Water Phase

Experimental Research to Evaluate Thermal Behavior of a Brushless Driving Servomotor for Linear Motion NC Axis Experimental Stand

2015 ◽  
Vol 762 ◽  
pp. 55-60
Author(s):  
Georgia Cezara Avram ◽  
Florin Adrian Nicolescu ◽  
Radu Constantin Parpală ◽  
Constantin Dumitrascu
Keyword(s):  
Thermal Behavior ◽  
Mathematical Models ◽  
Experimental Research ◽  
Infrared Imaging ◽  
Experimental Results ◽  
Ball Screw ◽  
Linear Motion ◽  
Functional Optimization ◽  
Thermal Infrared Imaging ◽  
Experimental Stand

This paper presents the works carried out by the authors in the field of structural and functional optimization of industrial robot's numerically controlled (NC) axes. The study includes the results obtained in the research stage of the experimental measurements performed to evaluate the electrical servomotor's thermal behavior using a thermal (infrared) imaging camera. The analyzed servomotor is a brushless servomotor integrated in an experimental stand for linear motion NC axis experimental research, existing in the MMS department from EMTS faculty. Supplementary to the driving servomotor, the experimental stand includes a belt drive transmission, a ball screw - bearings assembly and a driven element guided by ball rail system. This experimental research phase is part of the doctoral thesis of first author and was conducted in order to validate the mathematical models developed in the PhD thesis. Thus, experimental results presented in the paper have been used to validate first mathematical models for electric motor's preliminary selection and checking, (performed by determining the total reflected inertia of the mechanical system on motor shaft level) as well as the mathematical models for final selection and checking (by evaluating the servomotor's thermal energy dissipation, and servomotor's internal and external maximum operating temperature). Second, the experimental results have been used to validate the assisted simulation for structural and functional optimization of industrial robot's NC axes based on both servomotor and drive's thermal behavior analysis, performed in the thesis by means of a dedicated commercial software package.

Experimental Research on Rotating Skimmer

2003 ◽  
Author(s):  
Minoru Chino ◽  
Kenji Takizawa ◽  
Takashi Yabe
Keyword(s):  
Experimental Research ◽  
Rotational Speed ◽  
Rotation Speed ◽  
Experimental Results ◽  
Injection System ◽  
Benchmark Test ◽  
Injection Speed ◽  
Structure Interaction ◽  
Wide Range ◽  
Computer Codes

This paper provides the experimental results on skimmer and gives some detailed information useful for benchmark test of computer codes that are now able to simulate the fluid-structure interaction. For this purpose, we specially designed the injection system that imposes reproducible rotational speed and injection speed on the skipper. The effect of rotation is discussed by changing rotation speed in a wide range.

Study on the Lead-Free Easy-Cutting Mg-Sb Brass

2011 ◽  
Vol 239-242 ◽  
pp. 1670-1673 ◽  
Author(s):  
Lei Li ◽  
Biao Ma ◽  
Qiang Li ◽  
Guo Jie Huang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Grain Boundaries ◽  
Human Health ◽  
Hot Working ◽  
Experimental Results ◽  
Lead Free ◽  
Environment Friendly ◽  
Working Property ◽  
Pipe Joint

Traditional lead brass is gradually prevented from application by many countries’ governments because lead does harm to human health and pollutes the environment. New types of environment-friendly lead-free brass with favorable machinability are urgently demanded in the electrical, electronics and plumping fields. Lead-free Mg-Sb brass was fabricated in present. Experimental results showed that when the content of Mg is 1.0wt%, Sb is 0.8wt% and Cu is 58.0~59.0wt%, the alloy’s mechanical properties and machinability are favorable for industry application. With the increase of the content of Sb, the machinability increased, while the mechanical properties decreased. Lots of Cu2Mg and Cu9Sb2 particles on the order of microns exist in the inner-grain and grain boundaries. These particles improve the machinability, however, lower the tensile strength and the elongation. A three-way pipe joint was successfully punched with the fabricated Mg-Sb brass bar, and this demonstrated that the fabricated Mg-Sb brass possesses favorable hot working property.

Experimental Research on the Magnetic Field Sensitive Polymeric Actuator

2011 ◽  
Vol 287-290 ◽  
pp. 603-607
Author(s):  
Chun Lin Xia ◽  
Yang Fang Wu ◽  
Qian Qian Lu
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Conversion ◽  
Experimental Research ◽  
Experimental Results ◽  
Deformation Characteristics ◽  
Analysis Software ◽  
Element Analysis ◽  
The Magnetic Field

Using domestic MFSP membrane as a medium of energy conversion, a kind of MFSP actuator was designed. The dedicated test equipment was constructed for experimental research, and the experimental results were given. The strip and circular MSFP membrane were analyzed qualitatively to obtain the deformation characteristics of membrane by finite element analysis software.

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