Analysis of the possibility of using rubber track systems in high-speed engineering machines. Part II. Technical limitations

2021 ◽  
Vol 70 (1) ◽  
pp. 97-112
Author(s):  
Daniela Szpaczyńska ◽  
Marian Łopatka
Keyword(s):  
High Speed ◽  
Mechanical Engineering

The article presents problems and indicates limitations affecting the possibility of using rubber tracks in high-speed engineering machines. On the basis of the conducted analyzes, it was also indicated how to shape the running gear in such a way as to improve the working abilities of machines and minimize the disadvantages of rubber track systems. Keywords: mechanical engineering, elastomer tracks, running gear, high-speed engineering machines

Detailed Transportation Simulation for Improved Logistics Quality

1994 ◽  
Author(s):  
Harry C. Petersen ◽  
Amy Rummel
Keyword(s):  
High Speed ◽  
Mechanical Engineering ◽  
Interdisciplinary Teams ◽  
Control Measures ◽  
Engineering Practice ◽  
Logistics System ◽  
Vehicle Performance ◽  
High Speed Trains ◽  
Transportation Simulation ◽  
Logistics Quality

Abstract This paper demonstrates the advantages of logistics studies which include detailed transportation simulations based on mechanical engineering principles. Complex transportation system parameters are often averaged, aggregated, or assumed, resulting in models with questionable validity. Detailed simulations of route-specific real-world vehicle performance for analysis systems (such as Transport Probability Analysis) can often provide more accurate predictors of logistics system performance, resulting in valid projections of system transport times, costs, inventory levels, energy usage, standards, and quality control measures. A discussion of logistics is followed by examples of progressively complex logistics transportation simulations and models. Results of a moderately detailed performance-based simulation of high speed trains for the Texas Triangle are used to demonstrate the fallacy of assuming “average” performance measures. Future logistics studies will require detailed vehicle performance simulations using sound mechanical engineering practice, requiring interdisciplinary teams which include mechanical engineers.

2019 Nominations for ASME Historic Mechanical Engineering Landmark Status: Rail Transportation Category

2020 ◽  
Author(s):  
Michael E. Iden
Keyword(s):  
Diesel Engine ◽  
Diesel Engines ◽  
High Speed ◽  
Mechanical Engineering ◽  
Torque Converter ◽  
Rail Transportation ◽  
Heavy Duty ◽  
Welded Steel ◽  
Electric Traction ◽  
Stroke Cycle

Abstract The ASME Rail Transportation Division submitted five nominations in 2019 for ASME Historic Mechanical Engineering Landmark status. The nominations are for examples of significant railway technologies involving mechanical engineering and built between 1920 and 1964: 1. SBB 14253 “Crocodile” locomotive (1920): pioneering electric heavy-duty Swiss mountain locomotive, with pioneering features found in many subsequent electric locomotives. 2. Winton 8-201 prototype diesel engine (1933): only surviving of two experimental engines which preceded all GM-Electro-Motive 2-stroke cycle diesel engines for locomotives and other applications; first locomotive diesel engine with lightweight welded steel crankcase and unitized fuel injectors. 3. B&O 50 locomotive (1935): sole surviving example of the first (5) standalone, modular, non-articulated high-speed diesel locomotives from Electro-Motive, functional prototypes for the later “E” passenger and “FT” freight locomotives. 4. Cooper-Bessemer prototype diesel engine (1953): sole surviving example of (4) predecessor 4-stroke cycle diesel engines built for GE Transportation for field test locomotives prior to GE becoming a domestic locomotive manufacturer. 5. SP 9010 locomotive (1964): sole surviving example of (21) experimental German-built diesel locomotives for heavy-duty US mountain railroad operation using a hydromechanical torque converter transmission instead of electric traction motors; proved concept of higher-power and improved wheel-to-rail adhesion. All five nominations were submitted to the ASME national History & Heritage Committee for review. This paper provides a description of each nomination and the status of each proposed railroad Historic Mechanical Engineering Landmark.

The Methodic of Testing Using Experimental Equipment

2014 ◽  
Vol 635 ◽  
pp. 94-99
Author(s):  
Martin Kubelka ◽  
Tomáš Pačák ◽  
František Tatíček
Keyword(s):  
Mechanical Properties ◽  
Strain Rate ◽  
High Speed ◽  
Mechanical Engineering ◽  
Manufacturing Technology ◽  
Strain Rates ◽  
Experimental Equipment ◽  
Material Behaviour ◽  
Pressing Process ◽  
Engineering Institute

During pressing using high speed, the material is stressed to the limit of its mechanical properties. And this generates problems during production. For this reason, opens debate on the factors previously neglected, such as the strain rate. For determining the effect of strain rate on the pressing process has been designed to CTU, Faculty of Mechanical Engineering, Institute of Manufacturing Technology, equipment for monitoring the behaviour of the material at different strain rates. The article describes the creation of testing methodologies material behaviour using this device.

scholarly journals Research tools aplicable in designing of high-speed and high-power rail vehicles

2021 ◽  
Vol 31 ◽  
pp. 10-17
Author(s):  
Vojtěch Dybala
Keyword(s):  
High Power ◽  
High Speed ◽  
Mechanical Engineering ◽  
Dynamic Behaviour ◽  
Road Transport ◽  
Railway Vehicle ◽  
Railway Transport ◽  
Laboratory Equipment ◽  
Research Activities ◽  
Rail Vehicles

The importance of the railway transport of both goods and passengers continuously grows as it is in many points of view more ecological and economical solution in comparison with road transport. Just the importance has been supporting efforts to design more powerful and faster trains reaching traction powers more than 1.6 MW per a wheel-set or service top speed much more than 300 km/h till these days. To reach design which has enabled such a kind of performances it was necessary to research dynamic behaviour of railway vehicles. Both via laboratory measurements and simulations. The laboratory experiments have been carried out on a specially designed laboratory equipment called roller rigs. A laboratory equipped by roller rig for testing of the railway vehicle dynamic behaviour has been built at the Faculty of Mechanical Engineering at CTU in Prague, also within PhD studyprograms and SGS grants. Another powerful tool within research activities is a simulation. Kind of a such simulation will be presented by this contribution with the focus on the torsion dynamics of high-power fully-suspended drive of a railway vehicle, which has been developed also by PhD students under financial support of The Faculty of Mechanical Engineering and related grants.

Application of FPGAs to High-Speed Condition Based Maintenance of Rolling Element Bearings

Volume 3 ◽  
2004 ◽  
Author(s):  
Mark Harriman ◽  
Farbod Zorriassatine ◽  
Rob Parkin ◽  
Mike Jackson ◽  
Jo Coy
Keyword(s):  
Signal Processing ◽  
Condition Monitoring ◽  
Execution Time ◽  
Field Programmable Gate Array ◽  
High Speed ◽  
Mechanical Engineering ◽  
Electronic Engineering ◽  
Bearing Condition Monitoring ◽  
Field Programmable ◽  
Gate Array

Field-Programmable Gate Array (FPGA) technology has been applied widely in electronic engineering and computing industries, but it has not had the same level of reception in other disciplines including mechanical engineering [1]. The purpose of this paper is to examine FPGA implementations of signal processing techniques that are used in the context of bearing condition monitoring. As the number of bearings can be large sparse sensor arrays are used to locate and detect their condition. The demands of realtime process monitoring [2] [3] can place a heavy burden upon the monitoring system. Field-Programmable Gate Array (FPGA) technology [4] in this application makes it possible to implement more sophisticated algorithms. These exploit its high-speed, parallel, reconfigurable architecture. Bring forth the advantages of FPGA technology to condition monitoring. The techniques covered are: cross-correlation, digital signal processing (DSP) Infinite Impulse Response (IIR) filters, neural networks and signature matching. The implemented designs are optimised for both execution time and the amount of logic area consumed. Results were obtained from each technique and were assessed and compared in terms of execution time and also the amount of logic consumed on the FPGA. Over the past 15 years FPGA technology has been applied extensively in electronic engineering but its scope has not been as vastly in mechanical engineering. The objective of this paper was to examine an application in mechanical engineering. Ideally this would be done with a mechanical engineering compatible approach, giving rise to a methodology, which would allow FPGA programming [5] to become a transferable skill.

Probing Multicellular Dynamics in Xenopus Laevis Embryonic Development Using a Mechanical Engineering Based Microfluidic Feedback Approach

2010 ◽  
Author(s):  
YongTae Kim ◽  
Sagar D. Joshi ◽  
Philip R. LeDuc ◽  
Lance A. Davidson ◽  
William C. Messner
Keyword(s):  
Embryonic Development ◽  
Xenopus Laevis ◽  
High Speed ◽  
Mechanical Engineering ◽  
Fluorescent Protein ◽  
Microfluidic Channel ◽  
Temporal Regulation ◽  
Chemical Conditions ◽  
Green Fluorescent

Spatial and temporal regulation of chemical environments in and around cells or tissues for long time periods is important to understand multicellular signaling since the responses to chemical factors control the resulting coordinated events in development. Although progress has been made in command of single cell environments, both long-term and high-speed control of multicellular chemical environments in development is still challenging. We have developed a mechanical engineering based microfluidic feedback approach that allows long-term and high-speed manipulation of a laminar flow interface in a microfluidic channel. This approach enabled long-term spatiotemporal control of chemical conditions over Animal Cap (AC) explants during the gastrulation stage in Xenopus laevis embryonic development. We present the responses of the explants to periodic stimulation of steroid hormone dexamethasone (DEX) by tracking a hormone-activated nuclear-localizing green fluorescent protein tagged glucocorticoid receptor (nuc-GR-GFP). We believe that our approach will be useful in diverse areas including dynamic system and control in microfluidics, embryonic development, and spatiotemporally integrated biological responses.

Four Synchronous Transfer Mode of USB in Mechanical Engineering

2013 ◽  
Vol 644 ◽  
pp. 93-96
Author(s):  
Xue Peng Liu ◽  
Dong Mei Zhao
Keyword(s):  
Data Collection ◽  
Data Acquisition ◽  
Real Time ◽  
High Precision ◽  
High Speed ◽  
Mechanical Engineering ◽  
Basic Knowledge ◽  
Real Time Processing ◽  
Time Processing ◽  
Transfer Mode

The basic knowledge of USB in mechanical engineering is mainly introduced. The data acquisition is convenient and fast. The problem the synchronicity of the data collection is solved. USB transfer has the Characteristics of high speed, high precision, the multiple synchronous collection and real-time processing. Four feasible transfer software schemes are proposed

Analysis of the possibility of using rubber track systems in high-speed engineering machines. Part I. Review of design solutions

2021 ◽  
Vol 70 (1) ◽  
pp. 79-96
Author(s):  
Daniela Szpaczyńska ◽  
Marian Łopatka
Keyword(s):  
High Speed ◽  
Mechanical Engineering ◽  
Design Solutions ◽  
Armored Vehicles

The article presents an analysis of the design solutions of the running gear with rubber tracks in terms of their applicability in high-speed engineering machines that require intensive maneuvering and the ability to develop high tractive forces. Both solutions used in civil applications and the results of research on the use of rubber tracks in heavy armored vehicles were analyzed. On their basis, recommendations were formulated for the design of high-speed engineering machines and the rubber track systems used in them. Keywords: mechanical engineering, elastomer tracks, running gear, high-speed engineering machines

scholarly journals A Robotic System to Scan and Reproduce Object

2011 ◽  
Vol 2011 ◽  
pp. 1-11
Author(s):  
Cesare Rossi ◽  
Sergio Savino
Keyword(s):  
High Speed ◽  
Mechanical Engineering ◽  
Vision System ◽  
Laser Scanner ◽  
Robotic System ◽  
Robot Arm ◽  
End Effector ◽  
Laser Projector ◽  
Cloud Of Points ◽  
Linear Laser

An application of a robotic system integrated with a vision system is presented. The robot is a 3-axis revolute prototype, while the vision system essentially consists in a laser scanner made up of a camera and a linear laser projector. Both the robotic and the video system were designed and built at DIME (Department of Mechanical Engineering for Energetics), University of Naples Federico II. The presented application essentially consists of a laser scanner that is installed on the robot arm; the scanner scans a 3D surface, and the data are converted in a cloud of points in the robot’s workspace. Then, starting from those points, the end-effector trajectories adopted to replicate the scanned surface are calculated; so, the same robot, by using a tool, can reproduce the scanned object. The software was developed also at the DIME. The adopted tool was a high-speed drill, installed on the last link of the robot arm, with a spherical milling cutter in order to obtain enough accurate surfaces by the data represented by the cloud of points. An algorithm to interpolate the paths and to plan the trajectories was also developed and successfully tested.

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