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Mechanical and Mechatronics Engineering: Recent submissions
Now showing items 241-260 of 1512
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Molecular Dynamics Simulation for Nanoparticle-Surface Collision
(University of Waterloo, 2021-09-29)Nanoparticles are referred to as those particles with at least one dimension less than 100nm. Their small sizes lead to high surface area to volume ratios, which results in physi-cal and chemical properties different from ... -
Binder Development for Binder Jetting of Aluminum Powder
(University of Waterloo, 2021-09-27)Binder jetting (BJ) is a branch of additive manufacturing (AM) technology that uses progressive addition of powders and adhesive binders to build parts with complex geometries. Compared to the other AM methods, the BJ ... -
Design of a Novel Rear Cradle for Electrified Powertrains
(University of Waterloo, 2021-09-22)With the ever-increasing, stringent requirements of fuel economy, automotive manufacturers have cited reduction of vehicle weight as one of the most effective methods of decreasing fuel consumption and emissions. Due to ... -
Electrospark Deposited Interlayer and its Influence on Dissimilar Resistance Welding of DP600 to AA5052
(University of Waterloo, 2021-09-22)Challenges associated with the resistance spot welding of aluminum and steel must be addressed to enable wider use of low-density aluminum alloys in commercial vehicles. These challenges include the significant difference ... -
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 ... -
Designing a System for Measuring and Optimizing the Photothermal Conversion Efficiencies of Two Dimensional Nanomaterials for Cancer Therapy
(University of Waterloo, 2021-09-21)Cancer is a devastating disease with no definitive cure currently. Current treatments are invasive and can cause inreprepable damage to the human body. Alternative cancer treatment methods involving nanomaterials have ... -
Performance Analytics for Electron Beam Powder Bed Fusion of Ti-6Al-4V
(University of Waterloo, 2021-09-21)Titanium alloys are widely used in biomedical, aerospace, marine, energy and chemical industries because of their unique properties. Ti-6Al-4V, an α+β alloy, offers desirable properties such as high strength-to-weight ... -
Smart Exercise Adaptive Control of a Three Degree of Freedom Upper-limb Manipulator Robot
(University of Waterloo, 2021-09-15)An adaptive velocity field controller for robotic manipulators is proposed in this thesis. The control objective is to cause the user to exercise in a manner that optimizes a criterion related to the user’s mechanical ... -
Model Based Design Framework Development of a Hybrid Supervisory Controller for a P4 Parallel Hybrid Vehicle
(University of Waterloo, 2021-09-14)The expected rise in the number of ECUs in an automotive based development environment, poses additional efficiency risk on developer time and code complexity. This thesis examines the design and validation of a Hybrid ... -
Influence of As-cast Microstructure on Forging Behaviour of Magnesium Alloy AZ80
(University of Waterloo, 2021-09-14)Concerns over the environment and greenhouse gas emissions have incentivized the increased use of lightweight metals, such as magnesium alloys, to improve vehicle efficiency through a reduction in mass. While there are ... -
A New Approach to Reinforcement Learning for Sequential Robotic Tasks using a Chained Options Model and Subtask-Focused Rewards
(University of Waterloo, 2021-09-09)Reinforcement Learning for Robotics is a trending area of research with tremendous potential for widescale industry adoption. To its detriment, large amounts of environmental interactions are typically required by robotic ... -
Computational Modeling of Anterior Cruciate Ligament and Meniscus Strain During Stop-Jump Landings
(University of Waterloo, 2021-08-27)The anterior cruciate ligament (ACL) is one of the most critical joint stabilizers in the knee. Stop-jump landings are a particularly common maneuver that result in ACL injuries due to the large impact forces on the knees ... -
Aeroacoustics of Compressible Vortex Reconnection
(University of Waterloo, 2021-08-27)Aeroacoustics is a key focus in the design of propulsion, energy, and transportation systems. Noise generation in these systems is caused by the unsteadiness of the flow and simplified acoustic models are used to approximate ... -
Multivariable System Identification, Enhanced Disturbance Rejection, and Precision Motion Control for CNC Machine Tool Feed Drives
(University of Waterloo, 2021-08-27)In this thesis, precision modeling, multivariable system identification, and advanced motion control techniques are developed in order to improve the positioning accuracy and disturbance rejection of machine tool servo ... -
Controlling SALD-Deposited ZTO Nanofilm Composition and Implications for their use as Perovskite Solar Cell Transport Layers
(University of Waterloo, 2021-08-26)This thesis is concerned with the study of new nanofilm electron transport layers for use in perovskite solar cells, one of the thin film solar cell technologies in the research and very early commercial phases. Spatial ... -
Improving Dielectric Thin Films for Metal Insulator Metal Diodes and Perovskite Solar Cells
(University of Waterloo, 2021-08-25)Metal-insulator-metal (MIM) diodes are nano-electronic devices that operate by quantum tunneling of electrons through a thin dielectric layer to rectify high frequency alternating current (AC) to usable direct current (DC). ... -
Melting modes in laser powder bed fusion additive manufacturing
(University of Waterloo, 2021-08-18)Laser powder bed fusion (LPBF) is a metal AM technology that has one of the highest industrial uptake at the moment in the aerospace, automotive, and biomedical sectors. LPBF enjoys such popularity as it enables the ... -
Low Cost Wet Diaper Detector System
(University of Waterloo, 2021-08-12)The role of smart wet diaper detectors to health caregivers cannot be over-emphasized. Prolong wetness in patients and babies is one of the major causes of rashes especially when the wetness is not detected on time. ... -
Nanoscale Manipulation of Electrokinetic Transport for Iontronic Applications based on Surface Modification
(University of Waterloo, 2021-08-10)Electrokinetic transport demonstrates a lot of new physical behaviors in nanofluidic systems due to the high surface-to-volume ratios and interactions between the fluid and walls of nanofluidic systems. The unique properties ... -
Liquid Metal Embrittlement in Resistance Spot Welding: The Thermomechanical Origin and Embrittler Transport Mechanism
(University of Waterloo, 2021-08-05)To increase fuel economy, demand for lighter vehicles by way of thinner parts has risen in recent years. As parts become thinner the vehicle safety cannot be comprised, leading to the development of advanced high strength ...