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 15 of 15 for “"constrained control"”.
-
Constrained control using convex optimization
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1997.
-
Constrained Control of Complex Helicopter Models
… models that include effects typically ignored in control models, such as an analytical formulation for fuselage aerodynamics, blade lead-lagging and flexibility, and tail rotor aerodynamics, are derived. The landing gear, horizontal tailplane, a fully articulated main rotor, main rotor downwash, …
-
Structurally constrained control systems using a factorization approach
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
-
Constrained control allocation for systems with redundant control effectors
Control allocation is examined for linear time-invariant problems that have more controls than degrees of freedom. The controls are part of a physical system and are subject to limits on their maximum positions. A control allocation scheme commands control deflections in response to some desired …
-
Design of Robust PID Controllers with Constrained Control Signal Activity
… presents a new method for design of PI and PID controllers with the level of control signal activity taken into consideration. The main reason why the D-part is often disabled in industrial control loops is because it leads to control signal sensitivity of measurement noise. A frequently varying …
-
Constrained Control for Helicopter Shipboard Operations and Moored Ocean Current Turbine Flight Control
This dissertation focuses on constrained control of two applications: helicopter and ocean current turbines (OCT). A major contribution in the helicopter application is a novel model predictive control (MPC) framework for helicopter shipboard operations in high demanding sea-based conditions. A …
-
Implementation of Constrained Control Allocation Techniques Using an Aerodynamic Model of an F-15 Aircraft
Control Allocation as it pertains to aerospace vehicles, describes the way in which control surfaces on the outside of an aircraft are deflected when the pilot moves the control stick inside the cockpit. Previously, control allocation was performed by a series of cables and push rods, which …
-
Real-Time Moment Rate Constrained Control Allocation for Aircraft with a Multiply-Redundant Control Suite
The problem of aircraft control allocation is that of finding a combination of control positions that cause the resulting aircraft moments to most closely satisfy a given desired moment vector. The problem is easily solved for the case of an aircraft having three control surfaces, each of which …
-
Approximate dynamic programming solutions with a single network adaptive critic for a class of nonlinear systems
… dual network structure in solving for optimal control. In the second paper, the plant dynamics with parametric uncertainties or unmodeled nonlinearities has been considered. The author discusses the dynamic re-optimization of the J-SNAC controller that is used to capture the uncertainty but is …
-
Optimization of Low-Level Controllers and High-Level Polymer Grade Changes
Two design problems at different levels in the control hierarchy are considered; optimization of robust low-level controllers with constrained control signal activity and optimization of economical high-level polyethylene grade changes. As for the first design problem, a constraint on control …
-
Design and Certification of Industrial Predictive Controllers
… industrial activities on model predictive control (MPC). The improvement in efficiency of the on-line optimization part of MPC led to its adoption in mechanical and mechatronic systems from process control and petrochemical applications. However, the massive strides made by the academic …
-
Optimal shape design with domain decomposition
… this flow. Based on this idea, we formulated a control problem, in which the optimization procedure minimizes the error between the target flow and the actual flow through successive adjustment of the design parameters. We were interested in exploring the computational efficiency of the …
-
Analysis of epidemiological models for disease control in single and multiple populations under resource constraints
… disease dynamics. Examples range from reactive control measures, where the resources used to manage the epidemic in real time may be limited to prophylactic control measures such as deployment of genetically resistant plant varieties, which may lead to economic trade-offs. In such situations the …
-
Consensus Seeking, Formation Keeping, and Trajectory Tracking in Multiple Vehicle Cooperative Control
<p>Cooperative control problems for multiple vehicle systems can be categorized as either formation control problems with applications to mobile robots, unmanned air vehicles, autonomous underwater vehicles, satellites, aircraft, spacecraft, and automated highway systems, or non-formation control …
-
Ανάλυση και έλεγχος γραμμικών και μη γραμμικών συστημάτων με περιορισμούς μέσω πολυεδρικών συναρτήσεων Lyapunov
Το αντικείμενο της διατριβής αφορά την ανάλυση και τον έλεγχο δυναμικών συστημάτων με περιορισμούς στο διάνυσμα της εισόδου ή/ και στις μεταβλητές κατάστασης. Τα θεωρητικά εργαλεία που χρησιμοποιήθηκαν για την εξαγωγή των αποτελεσμάτων προέρχονται από τη θεωρία ευστάθειας Lyapunov, την αρχή …