In the design of robotic mechanisms, dynamic balancing i.e. force and moment balancing is an important issue. The robotic mechanisms accuracy and efficiency are affected because of the unbalance. Moreover, the forces and moments cause fatigue, noise and disturbance in its structural base. Previous research done by Prof. Chris Zhang include a force balancing method that is termed as adjusting kinematic parameters (AKP) for robotic mechanisms or real-time controllable (RTC) mechanisms. This research includes dynamic balancing method for planar mechanisms only i.e. two dimensional.
The aim of this project is to develop and characterize metal matrix composite materials for applications in the field of power electronics and automotive. The material under study are constituted by a copper or aluminum matrix, reinforced by carbon (fibers or platelets) and it is known that the composite properties depend on the orientation of the reinforcements. The objective of this research is to study and to evaluate the effect of a deformation (e.g extrusion) of the material on its thermal, electrical and mechanical properties.
Ocean wave energy converters (WECs) are devices that utilize ocean energy to produce electricity or fresh water. A key stage in developing these devices is scale model testing in wave tanks, as it allows the power generation capabilities of a design to be evaluated at a much lower cost and with no environmental risk compared to full scale testing in the ocean. One of the challenges with designing scale models of WECs is the power take-off (PTO) system which can be infeasible to implement at small scales.
Hydrogen fuel cells require humidification in order to operate effectively, yet, at the same time produce a constant stream of moisture through their exhaust. Membrane fuel cell humidifiers provide a method of recycling this moisture, thereby saving energy. They work similarly to heat exchangers, but take advantage of special polymer membranes in order to exchange moisture. Fuel cell environments can be very taxing on membranes, reaching temperatures of 95C, so selecting the right membrane material is of utmost importance.
Velan Inc. in Montreal, Quebec is one of the world leaders in design and manufacturing of industrial steel valves for applications in chemical, oil and gas, military, mining, and nuclear industries. Velan wishes to optimize its valve design in terms of maximum strength and minimum weight according to latest standard requirements. To achieve that, its existing analytical and finite element method (FEM) models should be improved by taking into account large deformation and contact analysis to accurately predict the failure point of stem and gate.
Additive manufacturing that is commonly called 3D printing has been identified as the 3rd industrial revolution because the outstanding flexibility that it brings to designer in the industry. Because the part is printed layer by layer, almost any complex geometry that can?t be made by conventional methods can be fabricated in a wide range of material like polymer, metal and ceramics. On the other hand, a major drawback of this technology limits its application in real engineering scenario in the industry and it?s the surface roughness of the printed part.
Production and utilization of ammonia in the transportation and power generation sector brings numerous advantages by introducing environmentally friendly, sustainable and efficient systems. Ammonia (NH3) is the only carbon-free chemical energy carrier together with hydrogen suitable for use as a transportation fuel. In this project, renewable energy based NH3 production methods are investigated for power generation, transportation and energy utilities. Specifically, concentrated solar energy based electrochemical ammonia synthesis is experimentally investigated.
Hydrogen powered polymer electrolyte membrane fuel cells (PEMFCs) are a clean energy technology that generates electricity without harmful emissions at the point of use. To accelerate commercialization, current R&D efforts mainly target reduced cost and increased lifetime. The proposed research project addresses both aspects by developing a unified chemical and mechanical modeling platform for evaluating membrane durability in PEMFCs. The core validation is based on extensive test and field data provided by our industry partner, Ballard Power Systems.
Verbal communication in noise while wearing hearing protection devices (HPDs) is often difficult. Recently, a Radio Acoustical Environment (RAVE) was developed within the EERS-ETS Industrial Research Chair in In-Ear Technologies (CRITIAS) to enhance communication for people wearing HPDs in noise. With RAVE, speech is captured from inside the ear, denoised, and enhanced to be sent only to listeners within a given spatial range. This range is determined based on the changes in the talkers vocal effort and background noise level. Currently, RAVE is at its prototype stage.
Jet noise is still the main contributor in airplane noise at take-off, which has been shown to induce health problems in the residents near airports that are now embedded in most large cities such as Toronto or Montreal. Engine manufacturers are now considering the Ultra-High Bypass Ratio (UHBR) type engine to further reduce noise. Yet the UHBR is a large shrouded fan configuration, having strong interactions with wings while integrated into the airframe.