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Full-Text Articles in Engineering
Unmanned Vehicles Formation Control In 3d Space And Cooperative Search, Saba Ramazani
Unmanned Vehicles Formation Control In 3d Space And Cooperative Search, Saba Ramazani
Doctoral Dissertations
The first problem considered in this dissertation is the decentralized non-planar formation control of multiple unmanned vehicles using graph rigidity. The three-dimensional formation control problem consists of n vehicles operating in a plane Q and r vehicles that operate in an upper layer outside of the plane Q. This can be referred to as a layered formation control where the objective is for all vehicles to cooperatively acquire a predefined formation shape using a decentralized control law. The proposed control strategy is based on regulating the inter-vehicle distances and uses backstepping and Lyapunov approaches. Three different models, with increasing …
Energy Harvesting Using Photovoltaic And Betavoltaic Devices, Ashish Sharma
Energy Harvesting Using Photovoltaic And Betavoltaic Devices, Ashish Sharma
Doctoral Dissertations
There is an important need for improvement in both cost and efficiency of photovoltaic cells. For improved efficiency, a better understanding of solar cell performance is required. An analytical model of thin-film silicon solar cell, which can provide an intuitive understanding of the effect of illumination on its charge carriers and electric current, is proposed. The separate cases of homogeneous and inhomogeneous charge carrier generation rates across the device are investigated. This model also provides for the study of the charge carrier transport within the quasi-neutral and depletion regions of the device, which is of an importance for thin-film solar …