Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"AGVs"”.
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Load volume considerations in the collision free route planning of material handling devices in FMS
… Systems (FMSs). Automated Guided Vehicles (AGVs) are commonly employed for this function. Efficient use of AGV systems requires proper routing and scheduling of vehicular traffic. The simultaneous routing of several AGVs to avoid collision is known to be an NP-Hard problem. In this research, …
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Combined effect of job and AGV dispatching rules on a flexible manufacturing system
… by an Automated Guided Vehicle System (AGVS). The operation of the AGVS is governed by two kinds of AGV dispatching rules: Workcenter Initiated Rules (WI), and Vehicle Initiated Rules (VI). At work-centers. jobs are prioritized for processing by Job Dispatching (JD) Rules. The objective …
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Automated Guided Vehicles for Material Flow in Fulfillment Centers
… the integration of automated guided vehicles (AGVs) in Amazon's fulfillment centers (FCs) to improve process efficiency, labor utilization, and improve employee safety. Through utilizing the Six-Sigma DMAIC method, the process path of Transport Support associate was selected as a focus because …
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A methodology that integrates the scheduling of job sequencing and AGV dispatching in a FMS
… new scheduling methodology, the currently used AGVS controller decision set was examined and expanded. The expanded decision set gives the AGVS controller more options to choose from when scheduling the AGVS. The developed integrated scheduling methodology contains four steps. The first step …
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Effect of control architectures on automated guided vehicle systems
Automated Guided Vehicle Systems (AGVSs) have been widely adopted by many low to medium manufacturing operations, particularly in Flexible Manufacturing Systems (FMS). The high degree of flexibility and control offered in vehicle routing has made AGVS a proven and viable material handling …
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The impact of vehicle dispatching on the design of multiple-transporters material handling systems
Although Automated Guided Vehicle Systems (AGVS) have been around for more than thirty years, designing an AGVS is still a difficult process because of the interaction of numerous system decisions. The many important elements and variables that must be considered when designing AGVS include the …
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Optimization of Automated Guided Vehicles (AGV) Fleet Size With Incorporation of Battery Management
… of materials. A critical aspect in the use of AGVs is determining the number of vehicles required for the system to meet the material handling requirements.</p> <p>Several models and simulations have been applied to determine the fleet size. Most of these models and simulations do not …
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A C-based simulation framework for automated guided vehicle systems
… framework for automated guided vehicle systems (AGVSs). The framework that was developed, AGVSF, uses the discrete, next-event simulation method and the C programming language. AGVSF consists of an organizational structure that provides for control of the execution of the simulation and a set of …
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A selection model for automated guided vehicles
… is made between automated guided vehicles (AGVs) and an automated guided vehicle system (AGVS). This research is concerned only with the selection of automated guided vehicles (AGVs). A selection model is developed which forces the user to evaluate attributes. his requirements and …
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Design of automated guided vehicle systems using Petri net models
… the design of automatic guided vehicle systems (AGVs) available in the literature are limited to the computations of the fleet size and the design of the guide path layout. Another major design factor which affects the performance of an AGV system is the locations and the dimensions of the …
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Simulation in Automated Guided Vehicle System Design
… types. Automated Guided Vehicle Systems (AGVS) have such capabilities and AGV functionality has been developed to improve flexibility and diminish the traditional disadvantages of AGV-systems. The AGV-system design is however a multi-faceted problem with a large number of design factors of …
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An autonomous forklift research platform for warehouse operations
… a long history, with automatic guided vehicles (AGVs) existing since the 1950s. Early vehicles were inflexible and relied on costly infrastructure. However, advances in technology have enabled a much greater level of sophistication. Yet, currently only 16% of companies operating warehouses make …
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Strategic and operational plan for better material handling
… the warehouse and production via implementing AGVs or transfer cars. In this thesis research we specifically analyze the use of AGVs and transfer cars. By implementing two transfer cars in 2012, the system capacity will remain adequate until 2018. This investment provides a $364,165 net present …
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Formation control of multiple robots under packet loss
… with a focus on Automated Guided Vehicles (AGVs) and drones. It presents a comprehensive analysis of how packet loss affects linear controllers, including Linear Quadratic Regulator (LQR) for AGV position tracking and a mixed H2/H∞ and Proportional Derivative (PD) controller for drone …
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MULTI-AGENT DEEP REINFORCEMENT LEARNING AND HYBRID SIMULATION FOR RESOURCE ALLOCATION IN PORT OPERATIONS
… Unlike traditional methods that optimize berths, AGVs, and Yard Blocks separately, our approach treats them as interconnected agents to enable collaborative optimization. The framework combines discrete event and agent-based simulation, allowing agents to iteratively learn optimal policies. …
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Simulation modeling of material handling systems: requirements and comparative analysis
… Operations of six material handling devices (AGVS, AS/RS, conveyors, cranes, fork trucks, and industrial robots) are studied to determine attributes which require modeling consideration. Four simulation software packages (GPSS, PROMODELPC, SIMAN IV, and SLAM II) are analyzed to determine their …
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A design methodology for operational control elements for automatic guided vehicle based material handling systems
… the layout of the guidance system on which the AGVs operate. The network approach, along with the coordinate system are employed for modeling the actual translation of vehicles and parts through the shop. The travel time of vehicles and parts between points depends on vehicle speed and the …
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A reduced visibility graph approach for motion planning of autonomously guided vehicles
… planning for Autonomously Guided Vehicles (AGVs) in well-structured, two-dimensional static and dynamic environments.<br/><br/>Two algorithms are proposed for solving the aforementioned problems. The first algorithm establishes the shortest collision-semi-free path for an AGV from its start …
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Analysis of automatic guided vehicles and self-guided vehicles for hospital foodservice
… relative merits of "Automatic Guided Vehicles" (AGVs) and "Self Guided Vehicles" (SGVs) in the area of hospital foodservice; Data is derived from the bids of Apogee Robotics for their Orbiter{dollar}\sp{\rm TM}{dollar} system (AGV) and Transitions Research Corp for the HelpMate{dollar}\sp{\rm …
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Data fusion of images and 3D range data
… and picking for Automated Guided Vehicles, AGVs, robots employed nowadays in the automatic logistic plants. The development of a technology capable of achieving such task would be a significant technological improvement compared to the structure currently used in this field: rigid, strongly …
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