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 11 of 11 for “"Nonlinear Design"”.
-
Nonlinear design in nanophotonics
… this thesis, we present a new technique for the design of transformation optics devices based on large-scale optimization to achieve the optimal effective isotropic dielectric materials within prescribed index bounds. In addition to the optimization, a key point is the identification of the …
-
Oscillator Phase Noise Reduction Using Nonlinear Design Techniques
… heavy saturation and high harmonic content. Redesigns of the example oscillator in active-bias and four-resistor-bias configurations show improved phase noise and lower harmonic levels at the output. Five oscillator designs of each bias configuration, each having a different pulse width, are …
-
Optimization of spacecraft battery charger/discharger systems
… develops a methodology to facilitate the optimum design of spacecraft power processing systems. Emphasis is placed on the battery charge and discharge systems. A comparison of several battery charge and discharge topologies is presented. Characteristics which effect the overall system performance …
-
A new scheme for the optimum design of stiffened composite panels with geometric imperfections
… Existing analysis codes are able to predict the nonlinear postbuckling behavior of a structure with specified imperfections. However, it is impossible to determine the geometric imperfection profile of a nonexistent composite panel early in the design. This is due to the variety of uncertainties …
-
Centralized Control of Power System Stabilizers
… wide area measurements to propose a centralized nonlinear controller that acts on power system stabilizers, to cooperatively increase the damping of problematic small signal oscillations all over the system. The structure based on decision trees results in a simple, efficient, and dependable …
-
Subsystem Design in Aircraft Power Distribution Systems using Optimization
… on the development of optimization tools for the design of subsystems in a modern aircraft power distribution system. The baseline power distribution system is built around a 270V DC bus. One of the distinguishing features of this power distribution system is the presence of regenerative power …
-
Improved robustness formulations and a simulation-based robust concept exploration method
The goal when applying robust engineering design methods is to improve a system's quality by reducing its sensitivity to uncertainty that has influence on the performance of the product. In the Robust Concept Exploration Method (RCEM) this approach is facilitated with additionally giving the …
-
Not as Planned
… propositions instead of a singular custom-fit design, this thesis asks: Can we think through multiple states and their transitions? What might this mean for sites of architecture and existing modes of practice? To design differently, architects need to be more unsure and unassuming. Resigning …
-
DESIGNS FOR TESTING LACK OF FIT FOR A CLASS OF SIGMOID CURVE MODELS
… the last decades. A well planned experiment design is essential to accurately estimate the parameters of the model. In contrast to a large literature and extensive results on optimal designs for linear models, research on the design for nonlinear, including sigmoid curve, models has not kept …
-
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 …
-
New tools for Bayesian optimal experimental design and kernel-based generative modeling
… and machine learning: optimal experimental design and generative modeling. Optimal experimental design (OED) is important to model development for science and engineering applications and beyond, especially when only a small number of observations can be taken or experiments performed, due …