Tim Joseph - Academia.edu (original) (raw)
Papers by Tim Joseph
Data from 1/20 by volume small scale field trials for conventional and concept dipper designs is ... more Data from 1/20 by volume small scale field trials for conventional and concept dipper designs is evaluated and compared with 1⁄2 by volume mid sized and full sized ultra class conventional dipper designs. Digging effort through hoist motor current draw or strain gauging data was used as the performance indicator for comparison. Crowd effort, although available was not used as it represents a minor proportion of the total effort expended. The results of the comparison showed that there are linear relationships between dipper capacity and suspended load and peak hoist load. These relationships were used to establish normalizing factors in the units of original data measurement, allowing a common plot of all shovel sizes for the conventional dipper design. Given all evaluations are common, the conventional and concept dipper small scale field trial performance data suspended and peak load reference relationships were evaluated to allow prediction of the ultra class concept design perfo...
Proceedings of the 30th International Symposium on Automation and Robotics in Construction and Mining (ISARC 2013): Building the Future in Automation and Robotics, 2013
International Journal of Service and Computing Oriented Manufacturing, 2016
As critical components of mining and construction projects, earthmoving operations utilise heavy ... more As critical components of mining and construction projects, earthmoving operations utilise heavy equipment to execute excavation, loading, hauling, dumping, grading, and compacting tasks in a repetitive and almost continuous manner. Previous models tend to simulate these operations at a higher level, which ignores various independent factors such as road layout, road material, road maintenance frequency, trucks and excavator characteristics, and weather conditions, which will affect the efficiency, environment and the capital cost continuously and dynamically. To incorporate various independent factors and models into the simulation platform, the simulation presented herein is developed with a distributed approach using high level architecture (HLA) standards to enable inclusion of different comprehensive models and behaviours that affect these operations. This paper presents the design and development of a comprehensive simulation of earthmoving operations and the components of the simulation and models implemented in each, with a major focus on the transportation and hauling component. It also describes the distributed development process and showcases the implementation outcomes and sample use and validation of the simulation.
Earthmoving operations are critical components of many mining and construction projects. These op... more Earthmoving operations are critical components of many mining and construction projects. These operations utilize heavy equipment to execute excavation, loading, hauling, dumping, grading, and compacting tasks in a repetitive and almost continuous manner. The efficiency, environmental impact and cost of these operations are affected by many interdependent factors. These include road layout, road material, road maintenance frequency, trucks and excavator characteristics, and weather conditions. This paper describes the design and development of a comprehensive simulation of earthmoving operations. The simulation presented herein is developed with a distributed approach using High Level Architecture (HLA) Standards to enable inclusion of different models and behaviors that affect these operations. The paper presents the components of the simulation and models implemented in each, with more focus on the transportation and hauling component. It also describes the distributed development...
Journal of Civil & Environmental Engineering, 2013
Geotechnical and Geological Engineering, 2010
Geotechnical and Geological Engineering, 2010
Data from 1/20 by volume small scale field trials for conventional and concept dipper designs is ... more Data from 1/20 by volume small scale field trials for conventional and concept dipper designs is evaluated and compared with 1⁄2 by volume mid sized and full sized ultra class conventional dipper designs. Digging effort through hoist motor current draw or strain gauging data was used as the performance indicator for comparison. Crowd effort, although available was not used as it represents a minor proportion of the total effort expended. The results of the comparison showed that there are linear relationships between dipper capacity and suspended load and peak hoist load. These relationships were used to establish normalizing factors in the units of original data measurement, allowing a common plot of all shovel sizes for the conventional dipper design. Given all evaluations are common, the conventional and concept dipper small scale field trial performance data suspended and peak load reference relationships were evaluated to allow prediction of the ultra class concept design perfo...
Proceedings of the 30th International Symposium on Automation and Robotics in Construction and Mining (ISARC 2013): Building the Future in Automation and Robotics, 2013
International Journal of Service and Computing Oriented Manufacturing, 2016
As critical components of mining and construction projects, earthmoving operations utilise heavy ... more As critical components of mining and construction projects, earthmoving operations utilise heavy equipment to execute excavation, loading, hauling, dumping, grading, and compacting tasks in a repetitive and almost continuous manner. Previous models tend to simulate these operations at a higher level, which ignores various independent factors such as road layout, road material, road maintenance frequency, trucks and excavator characteristics, and weather conditions, which will affect the efficiency, environment and the capital cost continuously and dynamically. To incorporate various independent factors and models into the simulation platform, the simulation presented herein is developed with a distributed approach using high level architecture (HLA) standards to enable inclusion of different comprehensive models and behaviours that affect these operations. This paper presents the design and development of a comprehensive simulation of earthmoving operations and the components of the simulation and models implemented in each, with a major focus on the transportation and hauling component. It also describes the distributed development process and showcases the implementation outcomes and sample use and validation of the simulation.
Earthmoving operations are critical components of many mining and construction projects. These op... more Earthmoving operations are critical components of many mining and construction projects. These operations utilize heavy equipment to execute excavation, loading, hauling, dumping, grading, and compacting tasks in a repetitive and almost continuous manner. The efficiency, environmental impact and cost of these operations are affected by many interdependent factors. These include road layout, road material, road maintenance frequency, trucks and excavator characteristics, and weather conditions. This paper describes the design and development of a comprehensive simulation of earthmoving operations. The simulation presented herein is developed with a distributed approach using High Level Architecture (HLA) Standards to enable inclusion of different models and behaviors that affect these operations. The paper presents the components of the simulation and models implemented in each, with more focus on the transportation and hauling component. It also describes the distributed development...
Journal of Civil & Environmental Engineering, 2013
Geotechnical and Geological Engineering, 2010
Geotechnical and Geological Engineering, 2010