Collision-Free Robot Coordination and Visualization Tools for Robust Cycle Time Optimization

2021 ◽  
Vol 21 (4) ◽  
Author(s):  
Domenico Spensieri ◽  
Edvin Åblad ◽  
Jonas Kressin ◽  
Johan S. Carlson ◽  
Alf Andersson
Keyword(s):  
Cycle Time ◽  
Industrial Test ◽  
Test Cases ◽  
Working Space ◽  
Design Cycle ◽  
Product Manufacturing ◽  
Visualization Tools ◽  
Synchronization Mechanisms ◽  
Novel Algorithms ◽  
The Relationship

Abstract This paper presents novel algorithms and visualization tools for avoiding collisions and minimizing cycle time in multi-robot stations by velocity tuning of robot motions. These tools have the potential to support product/manufacturing engineers in the practical task of adding synchronization instructions to robot programs to overcome the challenges in terms of product design, cycle time, quality control, and maintenance including re-usability of coordination schemes. We propose a range of techniques to achieve that, when additional requirements make the best coordination strategy hard to be chosen. Indeed, our main contributions are (i) considering and minimizing delays introduced by limitation in hardware synchronization mechanisms, (ii) highlighting insights on the relationship between a 3D working space and a path coordination space, and (iii) a computational tool for visualization of shared areas in both work space and path coordination space. Different strategies based on the developed algorithms are evaluated by successfully automatically solving industrial test cases from inspection measurement applications in the automotive industry. A study about how cycle time robustness is significantly influenced by variation in the robot motion execution times is also given.

scholarly journals A Method of Ore Blending Based on the Quality of Beneficiation and Its Application in a Concentrator

2021 ◽  
Vol 11 (11) ◽  
pp. 5092
Author(s):  
Bingyu Liu ◽  
Dingsen Zhang ◽  
Xianwen Gao
Keyword(s):  
Neural Network ◽  
Bp Neural Network ◽  
Industrial Test ◽  
Modeling Method ◽  
Daily Work ◽  
Production Site ◽  
Neural Network Algorithm ◽  
The Relationship ◽  
Ore Dressing

Ore blending is an essential part of daily work in the concentrator. Qualified ore dressing products can make the ore dressing more smoothly. The existing ore blending modeling usually only considers the quality of ore blending products and ignores the effect of ore blending on ore dressing. This research proposes an ore blending modeling method based on the quality of the beneficiation concentrate. The relationship between the properties of ore blending products and the total concentrate recovery is fitted by the ABC-BP neural network algorithm, taken as the optimization goal to guarantee the quality of ore dressing products at the source. The ore blending system was developed and operated stably on the production site. The industrial test and actual production results have proved the effectiveness and reliability of this method.

scholarly journals Negotiations of Science and Religion in Nordic Institutions: An Ethnographic Approach

Religions ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 45
Author(s):  
Tatiana Tiaynen-Qadir ◽  
Ali Qadir ◽  
Pia Vuolanto ◽  
Hans Petteri Hansen
Keyword(s):  
Science And Religion ◽  
Welfare States ◽  
Local Context ◽  
Scientific Rationality ◽  
Global Trends ◽  
Working Space ◽  
Health Clinics ◽  
World Society Theory ◽  
Health Practitioners ◽  
The Relationship

This article explores how two seemingly contradictory global trends—scientific rationality and religious expressiveness—intersect and are negotiated in people’s lives in Nordic countries. We focus on Finland and Sweden, both countries with reputations of being highly secular and modernized welfare states. The article draws on our multi-sited ethnography in Finland and Sweden, including interviews with health practitioners, academics, and students identifying as Lutheran, Orthodox, Muslim, or anthroposophic. Building on new institutionalist World Society Theory, the article asks whether individuals perceive any conflict at the intersection of “science” and “religion”, and how they negotiate such a relationship while working or studying in universities and health clinics, prime sites of global secularism and scientific rationality. Our findings attest to people’s creative artistry while managing their religious identifications in a secular, Nordic, organizational culture in which religion is often constructed as old-fashioned or irrelevant. We identify and discuss three widespread modes of negotiation by which people discursively manage and account for the relationship between science and religion in their working space: segregation, estrangement, and incorporation. Such surprising similarities point to the effects of global institutionalized secularism and scientific rationality that shape the negotiation of people’s religious and spiritual identities, while also illustrating how local context must be factored into future, empirical research on discourses of science and religion.

scholarly journals The Moderating Effect of Religiosity on the Relationship between Trust and Diffusion of Electronic Commerce

2015 ◽  
Vol 9 (13) ◽  
pp. 176
Author(s):  
Basharat Ali ◽  
Nazim Baluch ◽  
Zulkifli Mohamed Udin
Keyword(s):  
Electronic Commerce ◽  
Individual Characteristics ◽  
Moderating Effect ◽  
Business World ◽  
New Ideas ◽  
Product Manufacturing ◽  
Mind Set ◽  
Conceptual Study ◽  
The Relationship ◽  
And Diffusion

<p>Electronic commerce, an enormous revolution in today’s business world, has genuinely influenced the financial systems, marketplaces, product manufacturing, service and job industries, logistics and consumers’ mind-set. Consumers, posturing different individual characteristics, act differently in showing their trust in e-commerce business mainly due to the nature of the business. As an important predecessor of customers’ readiness to make use of e-commerce, it is essential to maintain consumers’ level of trust. Importantly, religiosity is one of the leading factors in building Muslim consumers’ opinion, both intra-personally and interpersonally, towards new ideas or latest technologies. This is a conceptual study to explore the moderating effect of religiosity on the relationship between trust and diffusion of e-commerce; in particular in Islamic perspective.  Exploring the enlightened moderate version of Islamic teachings toward new ideas and innovations including e-commerce, the study aims to highlight applicability of Islamic traits.</p>

scholarly journals Design of a Compact Planar Rectenna for Wireless Power Transfer in the ISM Band

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Fang Zhang ◽  
Xin Liu ◽  
Fan-Yi Meng ◽  
Qun Wu ◽  
Jong-Chul Lee ◽  
...  
Keyword(s):  
Cycle Time ◽  
Design Methodology ◽  
Low Cost ◽  
Wireless Power ◽  
High Conversion Efficiency ◽  
Operation Mechanism ◽  
Ism Band ◽  
Design Cycle ◽  
Rectenna Design ◽  
Compact Planar

This paper presents a compact planar rectenna with high conversion efficiency in the ISM band. The proposed rectenna is developed by the decomposing of a planar rectenna topology into two functional parts and then recombining the two parts into a new topology to make the rectenna size reduction. The operation mechanism of the antenna and rectifying circuit in the proposed novel topology is explained and the design methodology is presented in detail. The proposed topology not only reduces the rectenna design cycle time but also leads to easy realization at the required frequency ranges with a very low cost. For validation, a 2.45 GHz rectenna system is designed and measured to show their microwave performances.

A Study on Manufacturing Efficiency and Quality of Thermoforming

2010 ◽  
Vol 26-28 ◽  
pp. 1172-1176
Author(s):  
Guang Ma ◽  
Yun De Shen ◽  
Zhen Zhe Li ◽  
Dong Ji Xuan ◽  
Tai Hong Cheng ◽  
...  
Keyword(s):  
Heat Flux ◽  
Cycle Time ◽  
Analytic Solution ◽  
Heating Time ◽  
Heater Power ◽  
Manufacturing Efficiency ◽  
The Relationship ◽  
Optimal Heating

Thermoforming is one of the most versatile and economical processes available for shaping polymer products. The heating time and heater power must be optimized for obtaining good products efficiently. In this study, the method for calculating the required heat flux was researched at first. In the following step, the analytic solution was studied for getting optimal heating time and heater power. Finally, the relationship between heater power and heating time was discussed. The developed method in this study will be widely used to shorten the cycle time under the condition of satisfying requirements of thermoforming.

Design and Verification of a New Computer Controlled Seating Buck

2006 ◽  
Author(s):  
Nanxin Wang ◽  
Vijitha Kiridena ◽  
Gianna Gomez-Levi ◽  
Jian Wan ◽  
Steven Sieczka ◽  
...  
Keyword(s):  
Design Process ◽  
Cycle Time ◽  
Dimensional Accuracy ◽  
Vehicle Design ◽  
Functional Requirements ◽  
Package Design ◽  
Design Concepts ◽  
Design Cycle ◽  
Computer Controlled ◽  
High Level

Appraising vehicle package design concepts using seating bucks — physical prototypes representing vehicle package, is an integral part of the vehicle package design process. Building such bucks is costly and may impose substantial burden on the vehicle design cycle time. Further, static seating bucks lack the flexibility to accommodate design iterations during the gradual progression of a vehicle program. A “Computer controlled seating buck”, as described in this paper, is a quick and inexpensive alternative to the traditional seating bucks with the desired degree of fidelity. It is particularly useful to perform package and ergonomic studies in the early stages of a vehicle program, long before the data is available to build a traditional seating buck. Such a seating buck has been developed to accommodate Ford vehicle package design needs. This paper presents the functional requirements, the high level conceptual design of how these requirements are realized, and the methods to verify, improve and sustain the dimensional accuracy and capability of the new computer controlled seating buck.

Affect in Sporting Activities: a Preliminary Validation of the Worcester Affect Scale

2010 ◽  
Vol 19 (5-6) ◽  
pp. 71-91 ◽  
Author(s):  
Clare Rhoden ◽  
Julia West
Keyword(s):  
Physical Activity ◽  
Cycle Time ◽  
Time Trial ◽  
Positive And Negative Affect ◽  
Feeling States ◽  
Preliminary Validation ◽  
Psychometric Measures ◽  
Sporting Activities ◽  
Future Work ◽  
The Relationship

Affect in Sporting Activities: a Preliminary Validation of the Worcester Affect Scale The overly long psychometric measures available for affect may have caused difficulty measuring this construct during physical activity (Barkoff & Heiby, 2005; Wilhelm & Schoebi, 2007). This paper aims to create a two-item affect scale to measure feeling states during physical activity. In study 1 ninety-four participants completed the PANAS (Watson et al., 1988) and the newly designed Worcester Affect Scale (WAS) measuring positive and negative affect. In study 2, seven participants completed two 20km cycle time trials in the laboratory. PANAS and WAS were administered prior to and after the trials and WAS was reported at frequent regular intervals during each time trial. Preliminary validation of the WAS was confirmed with significant correlations between the WAS and PANAS. The WAS scale is quick and easy to administer and was sensitive in measuring fluctuations in affect within a 20km cycle time trial. Future work is needed to examine the fluctuations in affect and clarify the relationship between positivity and negativity.

scholarly journals Using Phaser and ensembles to improve the performance of SIMBAD

2020 ◽  
Vol 76 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Adam J. Simpkin ◽  
Felix Simkovic ◽  
Jens M. H. Thomas ◽  
Martin Savko ◽  
Andrey Lebedev ◽  
...  
Keyword(s):  
Model Identification ◽  
Structural Similarity ◽  
Test Cases ◽  
Target Sequence ◽  
Molecular Replacement ◽  
Search Models ◽  
Termination Criteria ◽  
Alternative Approach ◽  
The Relationship ◽  
Rotation Function

The conventional approach to search-model identification in molecular replacement (MR) is to screen a database of known structures using the target sequence. However, this strategy is not always effective, for example when the relationship between sequence and structural similarity fails or when the crystal contents are not those expected. An alternative approach is to identify suitable search models directly from the experimental data. SIMBAD is a sequence-independent MR pipeline that uses either a crystal lattice search or MR functions to directly locate suitable search models from databases. The previous version of SIMBAD used the fast AMoRe rotation-function search. Here, a new version of SIMBAD which makes use of Phaser and its likelihood scoring to improve the sensitivity of the pipeline is presented. It is shown that the additional compute time potentially required by the more sophisticated scoring is counterbalanced by the greater sensitivity, allowing more cases to trigger early-termination criteria, rather than running to completion. Using Phaser solved 17 out of 25 test cases in comparison to the ten solved with AMoRe, and it is shown that use of ensemble search models produces additional performance benefits.

scholarly journals Minimization of the Energy Consumption in Industrial Robots through Regenerative Drives and Optimally Designed Compliant Elements

2020 ◽  
Vol 10 (21) ◽  
pp. 7475
Author(s):  
Ilaria Palomba ◽  
Erich Wehrle ◽  
Giovanni Carabin ◽  
Renato Vidoni
Keyword(s):  
Energy Consumption ◽  
High Speed ◽  
Design Method ◽  
Electrical Energy ◽  
Motor Drives ◽  
Industrial Robots ◽  
Test Cases ◽  
Electrically Actuated ◽  
System Energy ◽  
The Relationship

This paper describes a method for reducing the energy consumption of industrial robots and electrically actuated mechanisms performing cyclic tasks. The energy required by the system is reduced by outfitting it with additional devices able to store and recuperate energy, namely, compliant elements coupled in parallel with axles and regenerative motor drives. Starting from the electromechanical model of the modified system moving following a predefined periodic path, the relationship between the electrical energy and the stiffness and preload of the compliant elements is analyzed. The conditions for the compliant elements to be optimal are analytically derived. It is demonstrated that under these conditions the compliant elements are always beneficial for reducing the energy consumption. The effectiveness of the design method is verified by applying it to two test cases: a five-bar mechanism and a SCARA robot. The numerical validations show that the system energy consumption can be reduced up to the 77.8% while performing a high-speed, standard, not-optimized trajectory.

Fast Simulation of Dynamic Behaviour of Heavy Duty Gas Turbines for Quality Improvement and Reduced Design Cycle Time

2007 ◽  
Author(s):  
Alastair S. Clark ◽  
Zdenko Jurjevic
Keyword(s):  
Cycle Time ◽  
Gas Turbines ◽  
Dynamic Behaviour ◽  
Forced Response ◽  
Mode Shapes ◽  
Coupled Modes ◽  
Accurate Identification ◽  
Simplified Approach ◽  
Design Cycle ◽  
Engine Testing

ALSTOM has made big improvements in simulating the dynamic behaviour of the GT (rotor, bearings and structural parts), in terms of displacements and forces by developing a 2 stage approach comprising a simplified physical model and detailed calculations using finite elements condensed into a matrix super element (substructuring). The models from each have been validated against frequency measurements. The simplified approach provides a fast overview in terms of sensitivity analysis of basic physical influences. It accurately reflects the generic dynamic behaviour of both rotor and structure. Reducing the FE-calculation time by a factor of 10 has enabled the influence of small or large modifications to individual part designs on the dynamic behaviour of the GT to be understood to the highest level of detailed design features. Calculated frequency results from modal and forced response calculations are compared to measurements within a 2% margin. In particular the focus is on the improvements in the quality of the finite element modelling with more detailed features and more accurate identification of eigenfrequencies and coupled modes. Validation work comprises the modal analysis of single parts and subassemblies as well as matching mode shapes and frequencies of complete gas turbine. Models are used to evaluate design improvements prior to engine testing or implementation in field engines in order to comply with prescribed exclusion zones, to be introduced as early as the concept stage as well as providing project teams with overviews for planning and decision making. Future developments to include Modal Assurance Criteria and rapid post-processing will further reduce design cycle time and improve quality in terms of the consistency and repeatability with regard to mode shape recognition.

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