In recent years, automation and robots have been applied at different domains to coordinate collaborative behavior in distributed systems and providing a powerful basis for proactive applications of complex nature, sp...
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ISBN:
(纸本)9789955283041
In recent years, automation and robots have been applied at different domains to coordinate collaborative behavior in distributed systems and providing a powerful basis for proactive applications of complex nature, specially in large scale disasters requiring complex tasks to be performed by groups under extreme time and resource constraints. Sri Lanka is still suffering from effects of December 2004 Tsunami disaster. Waste and debris becomes a key issue. Therefore, it is important to explore avenues to optimize post disaster waste management through automation and robotics. Thus, this paper aims to provide a critical review on automation and robotics applications at a post disaster scenario. Comprehensive literature review, documentary survey and field survey are adopted as methods of data collection. Survey revealed capacity constraints of expertise, funds and cultural issues as main challenges. Finally, the paper provides new avenues for effective utilization of automation and robotics through mapping of best practices.
Description: The authors and editor of this book wish to motivate people, especially under-graduate students, to get involved with the interesting field of robotics and mechatronics. We hope that the ideas and concept...
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Description: The authors and editor of this book wish to motivate people, especially under-graduate students, to get involved with the interesting field of robotics and mechatronics. We hope that the ideas and concepts presented in this book are useful for your own work and could contribute to problem solving in similar applications as well. It is clear, however, that the wide area of automation and robotics can only be highlighted at several spots but not completely covered by a single book.
Optimization of the weld sequence of a sub-assembly composed of thin walled aluminum alloy extruded beams is investigated and presented. The main factor considered is the quality of the assembly after welding, which i...
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Optimization of the weld sequence of a sub-assembly composed of thin walled aluminum alloy extruded beams is investigated and presented. The main factor considered is the quality of the assembly after welding, which is measured by the deformation behavior at pre-defined critical locations. The aluminum alloy extruded beam structure is simplified by a 2-D beam element model. Our methodology consists of applying pre-estimated angular shrinkages for each welding step thus eliminating use of a complex nonlinear transient analysis which would require consideration of thermo-mechanical interactions and plasticity. Two distortion modes (angular shrinkage and tilting shrinkage) are investigated and applied to model welding distortion. Different criteria for minimization of welding distortion have been investigated, such as overall deformation or weighted deformation with emphasis on some critical areas. A composite qualify index is formulated, which is a weighted measure of critical deformation and the overall deformation. For simulating welding deformation and the role of sequences, some weld sequences were selected heuristically and they were simulated in ANSYS 5.2. Based on the quality index of these sequences, some were reproduced while mutating other portions of these sequences to find better sequences. Finally, deformation data for each node and weighted measures of deformation for considered sequences are presented, and final deformed shapes for different sequences, maximum principal stress, and bending moment across the beams are shown graphically.
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