Browsing Doctoral Theses by Subject "Aeronautics and Astronautics."
Now showing items 1-20 of 552
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100 Gbps ptical coherent modem for low earth orbit optical inter-satellite links
(Massachusetts Institute of Technology, 2020)Free space optical communication (FSOC) provides a viable and cost-effective solution for future satellite systems with advantages in bandwidth, unregulated frequencies, and reduced system mass, volume, and power consumption ... -
3D MEMS via (post-) buckling of micromachined structures and integration of bulk nanoporous elements in microfluidic devices
(Massachusetts Institute of Technology, 2011)The last two decades have seen a proliferation of fields and applications where microtechnologies have gradually replaced, and often outperformed, their macroscopic counterparts. From engineering to basic sciences, ... -
An a posteriori error control framework for adaptive precision optimization using discontinuous Galerkin finite element method
(Massachusetts Institute of Technology, 2005)Introduction: Aerodynamic design optimization has seen significant development over the past decade. Adjoint-based shape design for elliptic systems was first proposed by Pironneau and applied to transonic flow by Jameson ... -
Accelerating Bayesian inference in computationally expensive computer models using local and global approximations
(Massachusetts Institute of Technology, 2014)Computational models of complex phenomena are an important resource for scientists and engineers. However, many state-of-the-art simulations of physical systems are computationally expensive to evaluate and are black ... -
Accident analysis and hazard analysis for human and organizational factors
(Massachusetts Institute of Technology, 2011)Pressures and incentives to operate complex socio-technical aerospace systems in a high-risk state are ever present. Without consideration of the role humans and organizations play in system safety during the development ... -
Achieving broad access to satellite control research with zero robotics
(Massachusetts Institute of Technology, 2013)Since operations began in 2006, the SPHERES facility, including three satellites aboard the International Space Station (ISS), has demonstrated many future satellite technologies in a true microgravity environment and ... -
Active control of radiated noise from a cylindrical shell using external piezoelectric panels
(Massachusetts Institute of Technology, 2002)Control architectures and methodologies are developed for the reduction of radiated noise from a thick-walled cylindrical shell using external piezoelectric panels. The proposed approach is to cover the shell's outer surface ... -
Active control of tip clearance flow in axial compressors
(Massachusetts Institute of Technology, 2001)Control of compressor tip clearance flows is explored in a linear cascade using three types of fluidic actuators; Normal Synthetic Jet (NSJ; unsteady jet normal to the mean flow with zero net mass flux), Directed Synthetic ... -
Active STPA : integration of hazard analysis into a Safety Management System Framework
(Massachusetts Institute of Technology, 2019)This dissertation describes a new approach to integrate a hazard analysis into Safety Management Systems (SMS). This new engineering process guides safety managers and analysts in the identification of a migration toward ... -
Adaptation methods for viscous flows
(Massachusetts Institute of Technology, 1989) -
Adaptive communication networks for heterogeneous teams of robots
(Massachusetts Institute of Technology, 2014)Seemingly, the era of ubiquitous connectivity has arrived, with smart phones, tablets, and small computing devices bringing internet straight to our fingertips - or has it? Two thirds of the world still does not have access ... -
Adaptive control of robot motion
(Massachusetts Institute of Technology, 1990) -
An adaptive finite element solution algorithm for the Euler equations
(Massachusetts Institute of Technology, 1988) -
An adaptive high order Reynolds-averaged Navier-Stokes solver with transition prediction
(Massachusetts Institute of Technology, 2015)The use of simulation techniques in applied aerodynamics has increased dramatically in the last three decades fostered by the growth in computational power. However, the state of the art discretization in industrial solvers ... -
Adaptive modality selection for navigation systems
(Massachusetts Institute of Technology, 2018)People working in extreme environments, where their mental and physical capabilities are taxed to the limit, need every possible advantage in order to safely and effectively perform their tasks. When these people -- such ... -
Adaptive robust model predictive control for nonlinear systems
(Massachusetts Institute of Technology, 2019)Modeling error and external disturbances can severely degrade the performance of Model Predictive Control (MPC) in real-world scenarios. Robust MPC (RMPC) addresses this limitation by optimizing over control policies but ... -
Adaptive sampling and forecasting with mobile sensor networks
(Massachusetts Institute of Technology, 2009)This thesis addresses planning of mobile sensor networks to extract the best information possible out of the environment to improve the (ensemble) forecast at some verification region in the future. To define the information ... -
An adaptive space-time discontinuous Galerkin method for reservoir flows
(Massachusetts Institute of Technology, 2018)Numerical simulation has become a vital tool for predicting engineering quantities of interest in reservoir flows. However, the general lack of autonomy and reliability prevents most numerical methods from being used to ... -
An adaptive variational multiscale method with discontinuous subscales for aerodynamic flows
(Massachusetts Institute of Technology, 2020)A promising methodology for accurate and efficient simulation of aerodynamic flows is output-based mesh adaptation, which optimizes a mesh to minimize the discretization error in an output of interest. The state of the art ... -
Addressing deep uncertainty in space system development through model-based adaptive design
(Massachusetts Institute of Technology, 2019)When developing a space system, many properties of the design space are initially unknown and are discovered during the development process. Therefore, the problem exhibits deep uncertainty. Deep uncertainty refers to the ...