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 19 of 19 for “"Nonlinear feedback control"”.
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Nonlinear feedback control of continuum systems.
Massachusetts Institute of Technology. Dept. of Electrical Engineering. Thesis. 1972. Sc.D.
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Nonlinear Feedback Control Systems With Sampled-Data
Made available in DSpace on 2014-12-04T21:02:59Z (GMT). No. of bitstreams: 1 5801717.pdf: 12084453 bytes, checksum: c44d8007fe1bf286e0e96df8d616ef4d (MD5) Previous issue date: 1958
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Optimal nonlinear feedback control of spacecraft attitude maneuvers
Polynomial feedback controls are developed for large angle, nonlinear spacecraft attitude maneuvers. Scalar and two-state systems are presented as simple examples to demonstrate the method, and several systems of state variables to parameterize spacecraft motion are considered. Both external and …
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Sinusoidal Analysis of Hysteresis Effects in Nonlinear Feedback Control Systems
Made available in DSpace on 2014-12-04T21:03:19Z (GMT). No. of bitstreams: 1 6101616.pdf: 3194447 bytes, checksum: c94460df6b6e5d7cd7c5f3c3ec50f14e (MD5) Previous issue date: 1961
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Optimization based nonlinear feedback control for pedestrian evacuation from a network of corridors
… of this study is on the development of a formal control methodology for an orderly and jam-free evacuation of pedestrians entrapped in a network of corridors in buildings in such emergency situations. To develop an effective solution, the pedestrian evacuation from a network of corridors is …
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Optimal Open Loop and Nonlinear Feedback Control for Remote Orbital Capture (multi-Body Dynamics, Recovery, Satellite Servicing, Payload Handling)
Optimal open loop and nonlinear feedback control histories are presented for the problem of detumbling (passivating) a target satellite by a remotely operated robot spacecraft. Detumbling is required so that the robot spacecraft, sometimes called a teleoperator or orbital maneuvering vehicle (OMV), …
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Time optimal control for asymptotic tracking of linear systems with input saturation
… with input saturation, and design composite nonlinear feedback controllers. We have explored the problem of asymptotic time optimal tracking for a class of linear system with actuator nonlinearities. A formula on the optimal settling time is given and the corresponding composite nonlinear …
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Computation of Lyapunov Exponents and Control of a Hyperchaotic System
… any n-th order chaotic and hyperchaotic systems. Controllers are then developed in order to stablize the hyperchaotic Chen system via linear feedback, speed feedback and nonlinear feedback control and a stability analysis is presented.</p>
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Fast half-loop maneuvers for the F/A-18 fighter aircraft using a singular perturbation feedback control law
The primary purpose of this study is to develop a nonlinear feedback control law for the F / A-I8 fighter aircraft that performs a fast half-loop maneuver. This feedback law is developed using a singular perturbation approach. A secondary purpose of this study is to establish a baseline for time …
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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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Dynamics and Control of Higher-order Nonholonomic Systems
<p>A theoretical framework is established for the control of higher-order nonholonomic systems, defined as systems that satisfy higher-order nonintegrable constraints. A model for such systems is developed in terms of differential-algebraic equations defined on a higher-order tangent bundle. A …
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System modeling and control design of a two-stage metering poppet-valve system
… mathematical models, stability criteria, and control designs for a two-stage poppet valve system with a simple back-side pipeline condition that may be used in a valve stack to create an independent metering function for a hydraulic circuit. First, this system is modeled as a nonlinear …
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Variable Structure Feedback Control with Application to Spacecraft with Small Thrust Propulsion Systems
… satellites to have accurate guidance and control systems. Small propulsion systems will also be beneficial for multiple small spacecrafts used future exploration expeditions beyond low Earth orbit. These small spacecrafts benefit from the simplicity of low thrust cold gas propulsion systems. …
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Nonlinear Control of a Thermoacoustic System with Multiple Heat Sources and Actuators
… burners. By using the aforementioned models, a nonlinear feedback control scheme is developed for a Rijke-type combustor system with n actuators and m heat sources.</p> <p>The performance of the controller is tested under different scenarios, assuring that is capable to exponentially stabilize …
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Nonlinear system identification and control using a neural network approach
… identified plant and also the design of a neuro-controller using multi-layer perceptrons (MLPs) for a complex system are presented. The quasi-linear system to be controlled is both unstable and nonlinear. The complete nonlinear feedback control system is designed without a priori information of …
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Adaptive control of nonlinear discrete-time systems and its application to control of a flexible-link manipulator
… work are to develop direct and indirect adaptive control strategies for discrete-time nonlinear systems and to investigate the applicability of the proposed schemes to adaptive tracking control of a flexible-link manipulator. The first problem considered is indirect adaptive control of a fully as …
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The development of Zero-G class underwater robots: unrestricted attitude control using control moment gyros
… robot that is capable of unrestricted attitude control. A novel control scheme based on internal actuation using Control Moment Gyros (CMGs) is proposed to provide Zero-G Class Autonomous Underwater Vehicles (AUVs) with this unique freedom in control.<br/><br/>The equations of motion for a CMG …
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Developing Active Artificial Hair Cell Sensors Inspired by the Cochlear Amplifier
… sensor's resonance region and possess favorable nonlinear characteristics. In the present work, multi-channel and self-sensing active artificial hair cells (AHCs) made of piezoelectric cantilevers and controlled by a cubic damping feedback controller are developed numerically and experimentally. …