Multidimensional Signal Analysis for Technical Condition, Operation and Performance Understanding of Heavy Duty Mining Machines

2015 ◽  
pp. 197-210 ◽  
Author(s):  
Pawel K. Stefaniak ◽  
Radoslaw Zimroz ◽  
Pawel Sliwinski ◽  
Marek Andrzejewski ◽  
Agnieszka Wyłomanska
Keyword(s):  
Signal Analysis ◽  
Technical Condition ◽  
Heavy Duty ◽  
Multidimensional Signal ◽  
And Performance

Analysis of Performance Evaluation Index for bridge group networking monitoring and collaborative supervision

2021 ◽  
Author(s):  
Liye Zhang ◽  
Yong He ◽  
Shoushan Cheng ◽  
Guoliang Wang ◽  
Hongwei Ren ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Evaluation Method ◽  
Field Testing ◽  
Technical Condition ◽  
Evaluation Index ◽  
Technical Problems ◽  
Condition Evaluation ◽  
Bridge Group ◽  
Performance Evaluation Index ◽  
And Performance

<p>With the number of bridges increases, the bridge health monitoring (BHM) technique is developing from single bridge monitoring to collaborative supervision of bridge group. Therefore, there are many technical problems need to be solved especially the performance evaluation index for bridge group network. This paper analyses the performance evaluation index of the bridges and bridge group network, establishes the performance evaluation index for bridge group based on rating factor (RF) and technical condition evaluation index. Based on bridge field testing and monitoring data, bridge technical condition evaluation index and performance evaluation method for bridge group are proposed. A case study demonstrates that the research results provide support for bridge group networking monitoring and collaborative supervision.</p>

Map Width Enhancement Technique for a Turbocharger Compressor

2013 ◽  
Vol 136 (6) ◽  
Author(s):  
Subenuka Sivagnanasundaram ◽  
Stephen Spence ◽  
Juliana Early
Keyword(s):  
Performance Improvement ◽  
Peak Pressure ◽  
Pressure Ratio ◽  
Comparison Study ◽  
Heavy Duty ◽  
Recirculating Flow ◽  
Heavy Duty Diesel ◽  
And Performance ◽  
The Stability ◽  
The Impact

This paper presents an investigation of map width enhancement and the performance improvement of a turbocharger compressor using a series of static vanes in the annular cavity of a classical bleed slot system. The investigation has been carried out using both experimental and numerical analysis. The compressor stage used for this study is from a turbocharger unit used in heavy duty diesel engines of approximately 300 kW. Two types of vanes were designed and added to the annular cavity of the baseline classical bleed slot system. The purpose of the annular cavity vane technique is to remove some of the swirl that can be carried through the bleed slot system, which would influence the pressure ratio. In addition to this, the series of cavity vanes provides a better guidance to the slot recirculating flow before it mixes with the impeller main inlet flow. Better guidance of the flow improves the mixing at the inducer inlet in the circumferential direction. As a consequence, the stability of the compressor is improved at lower flow rates and a wider map can be achieved. The impact of two cavity vane designs on the map width and performance of the compressor was highlighted through a detailed analysis of the impeller flow field. The numerical and experimental study revealed that an effective vane design can improve the map width and pressure ratio characteristic without an efficiency penalty compared to the classical bleed slot system without vanes. The comparison study between the cavity vane and noncavity vane configurations presented in this paper showed that the map width was improved by 14.3% due to a significant reduction in surge flow and the peak pressure ratio was improved by 2.25% with the addition of a series of cavity vanes in the annular cavity of the bleed slot system.

scholarly journals Datum ranking and analysis of factors affecting tire wear

2020 ◽  
Vol 1 (1) ◽  
pp. 164-169
Author(s):  
El’dar Kamil’evich ABDULAEV ◽  
Keyword(s):  
Production Management ◽  
Economic Effect ◽  
Technical Condition ◽  
Transport Costs ◽  
Factors Affecting ◽  
Field Development ◽  
Dump Trucks ◽  
Tire Production ◽  
Main Factors ◽  
And Performance

Relevance of the work. The operational efficiency and technical condition of mining vehicles to a large extent depend on the service life and performance characteristics of tires. The most important technological process that determines the effectiveness of field development is the transportation of rock mass. The share of motor transport costs in the total cost and production by open method at Russian mining enterprises is significant, and reaches 70% as the depth of open pits (cuts) increases. At the same time, the actual productivity of mining trucks is much lower than their technical and technological capabilities, and this difference is up to 2.5 times or more for various brands of vehicles, including imported ones. Today, both consumers and manufacturers of large tires are interested in the most efficient tire production management. Purpose of the work: consideration of the main factors affecting tyre life, as well as datum ranking of these factors to determine the degree of significance of each factor. Methodology of research. The systematic approach was used including datum ranking method, some analytical, computational methods and generalization. Results. The ranking was carried out by three independent groups of experts on a number of proposed factors. The main factors in each group were identified and the degree of agreement between the opinions of the interviewed specialists was evaluated. The general opinion of various expert groups on the significance and ranking of factors affecting the integrity of giant tires is confirmed. Conclusions. Datum ranking and analysis of factors affecting the wear of giant tires of mining dump trucks significantly affect the optimization of machine operation and, with appropriate adjustments, can give a positive economic effect.

Design and Performance Analysis of a Cascaded Model Predictive Controller and Command Governor for Fuel-Efficient Control of Heavy-Duty Trucks

2021 ◽  
Vol 143 (6) ◽  
Author(s):  
Ben Groelke ◽  
John Borek ◽  
Christian Earnhardt ◽  
Chris Vermillion
Keyword(s):  
Control Strategy ◽  
Heavy Duty ◽  
Model Predictive Controller ◽  
Fuel Savings ◽  
Heavy Duty Truck ◽  
Simulink Model ◽  
Car Following Model ◽  
Cascaded Model ◽  
Predictive Controller ◽  
And Performance

Abstract This paper presents the design and analysis of a predictive ecological control strategy for a heavy-duty truck that achieves substantial fuel savings while maintaining safe following distances in the presence of traffic. The hallmark of the proposed algorithm is the fusion of a long-horizon economic model predictive controller (MPC) for ecological driving with a command governor (CG) for safe vehicle following. The performance of the proposed control strategy was evaluated in simulation using a proprietary medium-fidelity Simulink model of a heavy-duty truck. Results show that the strategy yields substantial fuel economy improvements over a baseline, the extent of which are heavily dependent on the horizon length of the CG. The best fuel and vehicle-following performance are achieved when the CG horizon has a length of 20–40 s, reducing fuel consumption by 4–6% when compared to a Gipps car-following model.

Signal Denoising Method Based on KICA by Noise Components

2013 ◽  
Vol 329 ◽  
pp. 269-273
Author(s):  
Ling Li Jiang ◽  
Ping Li ◽  
Bo Zeng
Keyword(s):  
Independent Component Analysis ◽  
Signal Analysis ◽  
Vibration Signal ◽  
Independent Component ◽  
Signal Denoising ◽  
Denoising Method ◽  
One Dimensional ◽  
Kernel Independent Component Analysis ◽  
Multidimensional Signal

Denoising is an essential part of fault signal analysis. This paper proposes a kernel independent component analysis (KICA)-based denoising method for removing the noise from vibration signal. By introducing noise components of the observed signal, one-dimensional observed signal is extended to multi-dimensional signal. Then performing KICA on multidimensional signal, the noise in the observed signal consistent with the introduced noise will be removed that achieve the purpose of denosing. The effectiveness of the proposed method is demonstrated by the case study.

scholarly journals Sports Facilities – Analyses and New Trends

2014 ◽  
Vol 12 ◽  
pp. 44-47
Author(s):  
Martin Hudec ◽  
Lea Rollová
Keyword(s):  
Technical Condition ◽  
Past Century ◽  
Sports Facilities ◽  
School Sports ◽  
Younger Age ◽  
Sport Activities ◽  
And Performance ◽  
Sport Facilities ◽  
The City

The possibility to carry out sports activities is one of the factors which increase the quality of life for the citizens of a city. The city of Bratislava ranks among the biggest places of sport activities in Slovakia. Most of the sport facilities were, however, built in the past century; therefore they do not fulfill the demands of technical condition, economic efficiency, do not meet the international criteria of professional sport and do not meet the broad spectrum of the modern sport activities, especially for the younger age group users. It is needed to modernize and build the new sport buildings in all areas of sport, at school sports, sport for all and also in professional and performance sport activities. In accordance with the new trends in design of sports facilities, there is a need to reduce servicing costs, to improve implementation of technologies that increase the quality, safety and economy efficiency. The priority is the creation of multifunctional or hybrid facilities, which can offer the widest range of activities to users. In this report, the survey of the condition of existing sports facilities in Bratislava and proposal for possible solutions to the revitalization or the design of new facilities with sport function is published. The combinations of different activities which are compatible and suitable for multifunctional facilities are also published here.

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