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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Modelling and design of PEM fuel cell electric military armoured vehicles using a new real-world operation profile model

Ormsby, Scott 18 August 2021 (has links)
The activities of the Department of National Defence (DND) account for more than half of the Government of Canada's greenhouse gas emissions. This research examines a clean energy propulsion solution to DND’s carbon footprint using a Proton Exchange Membrane fuel cell (PEMFC) battery hybrid powertrain for military armoured vehicles as a means of meeting Canada's Greening Defence initiatives. Real-world military vehicle operational data is used to create the operation profile for military vehicle powertrain design requirements. Following the model-based design (MBD) approach, the vehicle dynamics, fuel cell system and powertrain system models implemented in MATLAB/Simulink are used to predict the vehicle's performance, emissions, and operational costs. This research examines the feasibility of using a fuel cell-battery electric powertrain for a military armoured vehicle and produces a feasible design solution to meet the identified vehicle operation and performance requirements. The fuel cost and powertrain component performance degradations are modelled to predict the operation costs of the clean vehicle with the benefits of reduced emissions, noise and thermal profiles. The results of this research suggest there are viable, clean propulsion system and energy storage system (ESS) configurations that satisfy the requirements of the operational profile of military armoured vehicles. This research serves as a foundation for the use of clean military vehicle propulsion in Canada. / Graduate
2

Low Intensity Conflict: Contemporary Approaches and Strategic Thinking

Searle, Deane January 2007 (has links)
Low Intensity Conflict (LIC) is a significant feature of the contemporary world and it is a particular challenge to the armed forces of many states which are involved is such conflict, or are likely to become so. This thesis is not concerned with how such difficult conflict situations arise. Rather it is concerned with how, from the point of view of the state, they may be contained and ultimately brought to a satisfactory resolution. The work is thus concerned with the practicalities of ending LIC. More specifically, the purpose of this research is to establish a framework of doctrinal and military principles applicable to the prevention and resolution of LIC. The principles of this thesis are based in numerous historical examples of LIC and six in depth case studies. These distilled principles are analysed in two central chapters, and are then applied in two latter defence force chapters so as to ensure there practicality and resilience. Numerous defence academics and military practitioners have been consulted in the production of this thesis; their contribution has further reinforced the functionality of the principles examined in this research. The research illustrates the criticality of a holistic approach to LIC. The function of this approach is to guarantee the stability of the sovereign state, by unifying civil, police, intelligence and military services. The effectiveness of the military elements must also be ensured, as military force is central to the suppression of LIC. Consequently, the research makes strategic and operational prescriptions, so as to improve the capability of defence forces that are concerned with preventing or resolving LIC.

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