Search for dissertations about: "systemteori"

Showing result 6 - 10 of 87 swedish dissertations containing the word systemteori.

2. 6. Utilizing Problem Structure in Optimization of Radiation Therapy

   Author : Fredrik Carlsson; Anders Forsgren; Edwin Romeijn; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Optimization; intensity-modulated radiation therapy; conjugate-gradient method; step-and-shoot delivery; column generation; quasi-Newton method; regularization; sequential quadratic programming; Optimization; systems theory; Optimeringslära; systemteori;

   Abstract : In this thesis, optimization approaches for intensity-modulated radiation therapy are developed and evaluated with focus on numerical efficiency and treatment delivery aspects. The first two papers deal with strategies for solving fluence map optimization problems efficiently while avoiding solutions with jagged fluence profiles. READ MORE

4. 7. Modeling and Model Reduction by Analytic Interpolation and Optimization

   Author : Giovanna Fanizza; Anders Lindquist; György Michaletzky; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Analytic Interpolation theory with a degree constraint; rational covariance extension problem; spectral estimation; model reduction; optimization; passive system; Optimization; systems theory; Optimeringslära; systemteori;

   Abstract : This thesis consists of six papers. The main topic of all these papers is modeling a class of linear time-invariant systems. The system class is parameterized in the context of interpolation theory with a degree constraint. READ MORE

5. 8. Control and coordination of mobile multi-agent systems

   Author : Tove Gustavi; Xiaoming Hu; Kostas J. Kyriakopoulos; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mobile robotics; tracking; obstacle avoidance; formation control; nonlinear observers; multi-agent coordination; connectivity graphs.; Optimization; systems theory; Optimeringslära; systemteori;

   Abstract : In this thesis, various control problems originating from the field of mobile robotics are considered. In particular, the thesis deals with problems that are related to the interaction and coordination of multiple mobile units. The scientific contributions are presented in five papers that together constitute the main part of the thesis. READ MORE

6. 9. Data Filtering and Control Design for Mobile Robots

   Author : Maja Karasalo; Xiaoming Hu; John Baras; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; formation control; tracking; nonlinear control; optimal smoothing; adaptive filtering; Optimization; systems theory; Optimeringslära; systemteori;

   Abstract : In this thesis, we consider problems connected to navigation and tracking for autonomousrobots under the assumption of constraints on sensors and kinematics. We study formation controlas well as techniques for filtering and smoothing of noise contaminated input. The scientific contributions of the thesis comprise five papers. READ MORE

7. 10. Inverse Problems in Analytic Interpolation for Robust Control and Spectral Estimation

   Author : Johan Karlsson; Anders Lindquist; Alberto Isidori; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nevanlinna-Pick Interpolation; Approximation; Model Reduction; Robust Control; Gap-robustness; Sensitivity Shaping; Entropy functional; Spectral Estimation; Weak*-topology; Monge-Kantorovic Transportation; Optimization; systems theory; Optimeringslära; systemteori;

   Abstract : This thesis is divided into two parts. The first part deals with theNevanlinna-Pick interpolation problem, a problem which occursnaturally in several applications such as robust control, signalprocessing and circuit theory. We consider the problem of shaping andapproximating solutions to the Nevanlinna-Pick problem in a systematicway. READ MORE