Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 184 for “"control laws"”.
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A study of sub-optimal control laws
Electronic Thesis
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Linear Control Laws for Singular Linear Systems
Made available in DSpace on 2014-12-08T22:23:30Z (GMT). No. of bitstreams: 1 6408438.pdf: 722029 bytes, checksum: e7b5b8e6e863a4d1d6fce4411ca872f0 (MD5) Previous issue date: 1964
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Incremental synthesis of optimcal control laws using learning algorithms
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1993.
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Designing Active Control Laws in a Computational Aeroelasticity Environment
… is to develop a methodology for designing active control laws in a computational aeroelasticity environment. The methodology involves employing a systems identification technique to develop an explicit state-space model for control law design from the output of a computational aeroelasticity code. …
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Development of Fault Tolerant Adaptive Control Laws for Aerospace Systems
… and implementation of intelligent adaptive control techniques designed to maintain healthy performance of aerospace systems subjected to malfunctions, external parameter changes and/or unmodeled dynamics. The dissertation is focused on the development of novel adaptive control configurations …
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Design of robust feedback control laws for high-dimensioned systems
The design of feedback control laws for discrete models of flexible structures is addressed. Two strategies are proposed. First, a parameter optimization method is used, in which the behavior of the controller is described by a performance measure and numerically optimized. A second method, based …
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Development of Robust Control Laws for Disturbance Rejection in Rotorcraft UAVs
… design, development and implementation of robust control algorithms for disturbance rejection in rotorcraft UAVs. The main focus is the rejection of external disturbances caused by wind influences. Four control algorithms are developed in an effort to mitigate wind effects: baseline nonlinear …
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Design of Flight Control Laws for a Novel Stratospheric Dual-Aircraft Platform
… to support the development and testing of flight control systems. This environment includes nonlinear aerodynamic models for the aircraft, a multi-element cable dynamics model, propeller-motor thrust model, control surface actuator models, and permits time-varying wind profiles. This simulator …
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Nonlinear adaptation of established linear and predictive control laws through safe reinforcement learning
… (RL) enables the prospect of data-driven controllers that learn to select control actions optimally purely through the feedback provided by an evaluative signal (the reward). In principle, this technology may be used to develop adaptive controllers that account for plant-model mismatches, …
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An analysis of the role of firearms control laws in South African society
… establish on empirical grounds the role firearms control laws play in South African society. A holist methodological position was adopted from among the alternatives available for scientific social research, and the structural-functional theoretical framework of the main line tradition was …
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Design and control of a space based two link manipulator with Lyapunov based control laws
… link manipulator, and momentum wheel actuator to control the pitch attitude of the spacecraft. Position information from the main body and manipulators was obtained from Rotary Variable Displacement Transducers (RVDT). The equations of motion were developed assuming that the main body and …
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Development of a Research Spacecraft Test-Bed with Implementation of Control Laws to Compensate Undesired Dynamics
… and verification of guidance, navigation and control algorithms. Description of EASY spacecraft systems, sub-systems and integration is presented in this thesis along with an analysis of results from numerical simulation and actual implementation of control laws. An attitude control …
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Public Support For Stricter Gun Control Laws In America Following The Tragedy At Sandy Hook Elementary
… in public outrage and debates regarding gun control laws, due in large part to several mass shootings across the nation. The purpose of this study is to explore how mass shootings influence attitudes toward gun control. More specifically, this study will examine the respondents' familiarity …
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UAS Model Identification and Simulation to Support In-Flight Testing of Discrete Adaptive Fault-Tolerant Control Laws
… Direct and Indirect Model Reference Adaptive Control. Description of the UAS, sub-systems, and integration is presented in this thesis along with analysis of results from numerical simulation to support the design, development, and validation of adaptive control laws for fault tolerance. A set …
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Performance Analysis Of Non-Linear Adaptive Control Laws Using Hardware in the Loop of an Unmanned Aerial System
… performance.</p> <p>In this thesis, different control laws based on the formation flight geometry problem, nonlinear dynamic inversion and an artificial immune system adaptive mechanism , are implemented in hardware-in-the-loop as a precursor for in-flight testing. These controllers are …
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Modeling of a Hybrid-Electric System and Design of Control Laws for Hybrid-Electric Urban Air Mobility Power Plants
… hybrid-electric systems and the development of control logic specifically for AAM aircraft. This thesis focusses on the modeling and design of control logic for hybrid-electric power plants for Advanced Air Mobility (AAM) applications. The developed model can assist in designing and optimizing …
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Magnetic Stabilization of Nadir-Pointing Small Satellites
<p>Since magnetic control systems are relatively lightweight, require low power and are inexpensive, they are attractive for small, inexpensive satellites in low Earth orbits. In this thesis we present averaging-based feedback control laws that achieve three-axis stabilized nadir-pointing attitude. …
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Mixed Control Moment Gyro and Momentum Wheel Attitude Control Strategies
Attitude control laws that use control moment gyros (CMGs) and momentum wheels are derived with nonlinear techniques. The control laws command the CMGs to provide rapid angular acceleration and the momentum wheels to reject tracking and initial condition errors. Numerical simulations of derived …
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Orbital transfer trajectory optimization
… for impulsive engines because a continuous control law must be found and long integrations are necessary to determine whether the control law works or not. Previous work on optimizing low thrust orbital transfers has led to the development of control laws for continuous thrusting including …
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