Browsing Mechanical and Mechatronics Engineering by Title
Now showing items 1206-1225 of 1483
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Rapid Fabrication Techniques for Anatomically-Shaped Calcium Polyphosphate Substrates for Implants to Repair Osteochondral Focal Defects
(University of Waterloo, 2007-10-01)The purpose of the present study is to develop techniques for manufacturing anatomically-shaped substrates of implants made from calcium polyphosphate (CPP) ceramic. These substrates have tissue-engineered cartilage growing ... -
Rapid Identification of Virtual CNC Drives
(University of Waterloo, 2007-08-23)Virtual manufacturing has gained considerable importance in the last decade. To obtain reliable predictions in a virtual environment, the factors that influence the outcome of a manufacturing operation need to be carefully ... -
Rapid prediction of real-time thermal characteristics, solidification parameters and microstructure in laser directed energy deposition (powder-fed additive manufacturing)
(Elsevier, 2019-12)The localized thermal characteristics, solidification parameters and the corresponding microstructure depend highly on the process parameters in the laser powder-fed additive manufacturing (LPF-AM) process. However, ... -
Rapid Thermo-mechanical Modeling of Laser Powder-Bed Fusion Additive Manufacturing using an Effective Heat Source
(University of Waterloo, 2021-09-22)Laser powder-bed fusion (LPBF) is one of the most common types of additive manufacturing (AM) processes that has gained a lot of attraction by industries. This process induces a high magnitude of a temperature gradient ... -
Real time resistance monitoring during sintering of silver paste
(Elsevier, 2018-01-15)Real time resistance monitoring technology is used to study the silver sintering process. Signals of joint resistance show events such as resistance increase to >10 GΩ, abrupt resistance drop from >10 GΩ to <1 kΩ, ... -
Real time resistance monitoring technology for microjoining process and reliability test
(University of Waterloo, 2017-12-14)New microjoining materials are needed for the soldering of electronic components due to environmental concern, reliability concern, and designing restriction. For example, a new low melting point solder is needed due to ... -
Real-time 3D Object Detection for Autonomous Driving
(University of Waterloo, 2018-05-10)This thesis focuses on advancing the state-of-the-art 3D object detection and localization in autonomous driving. An autonomous vehicle requires operating within a very unpredictable and dynamic environment. Hence a robust ... -
Real-Time Closed-Loop Control of Microstructure and Geometry in Laser Materials Processing
(University of Waterloo, 2017-12-18)Laser Materials Processing (LMP) is currently one of the fastest growing technologies of the 21st century. Different categories of this technology such as Laser Additive Manufacturing (LAM) and Laser Heat Treatment (LHT) ... -
Real-time estimation of the road bank and grade angles with unknown input observers
(Taylor & Francis, 2017-01-24)This paper proposes an approach for the estimation of the road angles independent from the road friction conditions. The method employs unknown input observers on the roll and pitch dynamics of the vehicle. The correlation ... -
Real-Time Monitoring of Thermal Processes
(University of Waterloo, 2023-09-27)In this research, a monitoring system for thermal processes was developed which measures the most critical process phenomena, such as thermal dynamics (peak temperature, heating rate, and cooling rate) and geometric features, ... -
Realtime Motion Planning for Manipulator Robots under Dynamic Environments: An Optimal Control Approach
(University of Waterloo, 2013-04-19)This report presents optimal control methods integrated with hierarchical control framework to realize real-time collision-free optimal trajectories for motion control in kinematic chain manipulator (KCM) robot systems ... -
Reconfigurable Integrated Control for Urban Vehicles with Different Types of Control Actuation
(University of Waterloo, 2017-12-08)Urban vehicles are designed to deal with traffic problems, air pollution, energy consumption, and parking limitations in large cities. They are smaller and narrower than conventional vehicles, and thus more susceptible to ... -
Reconfigurable Integrated Vehicle Stability Control Using Optimal Control Techniques
(University of Waterloo, 2017-09-15)The motivation for the development of vehicle stability control systems comes from the fact that vehicle dynamic behavior in unfavorable driving conditions such as low road-tire adhesion and high speed differs greatly from ... -
Recovering Optimal Cost Functions for Natural Walking: From Musculoskeletal Simulation to Exoskeleton Control
(University of Waterloo, 2022-05-03)Human movement studies have contributed to our understanding of how the central nervous system's (CNS) interactions with our body results in rich and complex motor behaviours, such as human gait. Such understanding is ... -
Recurrent Neural Network Dual Resistance Control of Multiple Memory Shape Memory Alloys
(University of Waterloo, 2018-08-23)Shape memory alloys (SMAs) are materials with extraordinary thermomechanical properties which have caused numerous engineering advances. NiTi SMAs in particular have been studied for decades revealing many useful characteristics ... -
Redistribution of charged aluminum nanoparticles on oil droplets in water in response to applied electrical field
(Springer, 2016-05-18)Janus droplets with two opposite faces of different physical or chemical properties have great potentials in many fields. This paper reports a new method for making Janus droplets by covering one side of the droplet with ... -
Redistribution of mobile surface charges of an oil droplet in water in applied electric field
(Elsevier, 2016-10)Most researches on oil droplets immersed in aqueous solutions assume that the surface charges of oil droplets are, similar to that of solid particles, immobile and distributed uniformly under external electric field. ... -
Redundant Hybrid Cable-Driven Robots: Modeling, Control, and Analysis
(University of Waterloo, 2019-08-29)Serial and Cable-Driven Parallel Robots (CDPRs) are two types of robots that are widely used in industrial applications. Usually, the former offers high position accuracy at the cost of high motion inertia and small workspace ... -
Refill Friction Stir Spot Welding Of Dissimilar Alloys
(University of Waterloo, 2015-12-22)Lightweight alloy materials such as magnesium and aluminum alloys are frequently employed in the automotive and manufacturing industry in order to improve vehicle fuel economy. This creates a pressing need for joining of ... -
Reflectivity and Elastic Modulus of Nano-Aluminum Films on Silicon Crystal Substrates
(University of Waterloo, 2014-06-17)In this work, effect of film thickness on optical reflection and elastic modulus of the metal film at very low size was studied. We choose Aluminium as a reflective surface where it mostly used as a typical material for ...