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.
Results
Showing 1 to 20 of 24 for “"L1 Adaptive Control"”.
-
Simulink toolbox for L1 adaptive control
… presents our work on Simulink Toolbox for L1 control. It starts with a brief idea on what parameters define an L1 controller. The document then explains how our toolbox provides an interface for selecting those parameters. Following the interface is a short review of inner working of the …
-
L1-Adaptive Control for Anesthesia Delivery
… the first application of recently developed L1-adaptive control methods for the closed-loop control of anesthesia delivery during surgery. Our initial objective, described herein, is to design controllers that are robust to inter-patient variability, such that patients follow a prespecified …
-
L1 adaptive control with quantization and delay
This dissertation involves L1 adaptive control development and analysis in the presence of quantization and system delays, addressing quantized uncertain systems and delayed uncertain systems. We discuss three cases of control of quantized systems: the state feedback control for systems with input …
-
L1 adaptive control within Learn-to-Fly
… the development and flight testing of a learning control framework that was combined with real-time modeling and real-time guidance algorithms to test the feasibility of the NASA Learn-to-Fly concept. The objective of Learn-to-Fly is to reduce or eliminate the need for ground-based aerodynamic …
-
Two new extensions to L1 adaptive control theory
This thesis introduces two new extensions to L1 adaptive control theory. The first is an L1 adaptive state feedback controller with generalized proportional adaptation law for a class of linear systems with input–gain uncertainties and unmatched nonlinear disturbances. The proportional adaptation …
-
Robust model-based reinforcement learning using L1 adaptive control
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-08-01
-
L1 adaptive control augmentation system for the X-48B Aircraft
This thesis considers the application of L1 adaptive control methodology to a model of the X-48B Blended Wing Body aircraft. We explicitly verify the performance bounds of the adaptive flight control system at various flight conditions. We demonstrate that the resulting L1 adaptive controller does …
-
Distributionally robust L1 adaptive control for nonlinear ITˆO diffusion processes
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
-
L1 adaptive control for nonlinear and non-square multivariable systems
This research presents development of L1 adaptive output-feedback control theory for a class of uncertain, nonlinear, and non-square multivariable systems. The objective is to extend the L1 adaptive control framework to cover a wide class of underactuated systems with uniform performance and …
-
Augmenting L1 Adaptive Control of Piecewise Constant Type to Aerial Vehicles
In aerial vehicle control design, the industrial baseline is to use robust control methods together with gain-scheduling to cover the full airspeed and altitude flight envelope. An adaptive controller could possibly add value by increasing performance while keeping robustness to deviation from …
-
L1 adaptive control flight testing and extension to nonlinear reference systems with unmatched uncertainty
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
-
L1 Adaptive Control of Uncertain Nonlinear Systems with Dynamic Constraints: As Applied to Commercial Aircraft Engines
<p>L1 adaptive control for a turbofan commercial aircraft engine is developed and applied in the presences of constraint limits. Turbofan engines are a highly complex system, with a wide variety of dynamics, operating under constantly changing environmental conditions. In aircraft turbofan …
-
Verifiable Adaptive Control Solutions for Flight Control Applications
… theoretical problems relevant to flight control for aerial vehicles and weapons in highly uncertain dynamical environment. The approach taken in this dissertation is the L1 adaptive control, which is elaborated from its design perspective for output feedback solution and is extended to …
-
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 …
-
Wavelet adaptive and predictive control with applications to chemical looping system
… coal power plants. Application of the available control techniques to this process to guarantee its tight and robust operation and control has not resulted in satisfactory performance due to its highly uncertain (200% actuator uncertainty) nonlinear multiphase multiscale behavior, bringing in a …
-
Adaptive control for enhanced performance of devices and algorithms
… of this dissertation is to explore the use of adaptive feedback control algorithms in control-based continuation of periodic solutions of a priori unknown dynamical systems under continuous variations in system parameters, independently of their stability. The control-based continuation …
-
Robust adaptive control of induction machines using the L1 control scheme
In this thesis, a robust adaptive control scheme is proposed in order to drive an induction motor with high performance, even in the presence of unknown machine electrical parameters. Magnetic saturation within an induction motor results in nonlinear, changing flux dynamics. Also, rotor resistance …
-
Experimental validation of an L1 controller on a single robotic manipulator on a moving platform and a robotic cooperative network
… theoretical predictions for the dependence on control parameters of an L1 adaptive control strategy. The experiments verify expected bounds on the tracking error in terms of the bandwidth of a filter introduced in the control loop. Moreover, the results provide insight into different …
-
A matlab-based toolbox for the simulation and design of L1 adaptive controllers
This thesis introduces the L1 Adaptive Control Toolbox, a set of tools implemented in Matlab that aid in the design process of an L1 adaptive controller and enable the user to construct simulations of the closed-loop system to verify its performance. Following a brief review of the existing theory …
-
L1 adaptive output-feedback control architectures
This research focuses on development of L1 adaptive output-feedback control. The objective is to extend the L1 adaptive control framework to a wider class of systems, as well as obtain architectures that afford more straightforward tuning. We start by considering an existing L1 adaptive …
Page 1 of 2