Sökning: "Unknown inputs"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden Unknown inputs.

1. 1. Indirect System Identification for Unknown Input Problems : With Applications to Ships

   Författare :Jonas Linder; Martin Enqvist; Fredrik Gustafsson; Alexandre Sanfelice Bazanella; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; System identification; Model structure; Unknown inputs; Indirect input measurements; Physical models; Instrumental variable; Closed loop; Graybox model; Identifiability; Ship; Marine vessel; Operational safety; Inertial measurement unit;

   Sammanfattning : System identification is used in engineering sciences to build mathematical models from data. A common issue in system identification problems is that the true inputs to the system are not fully known. In this thesis, existing approaches to unknown input problems are classified and some of their properties are analyzed. LÄS MER

3. 2. Robust observer design for a class of nonlinear systems: LMI approach

   Författare :Saleh Sayyaddelshad; Sophie Tarbouriech; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

   Sammanfattning : Observer design for nonlinear systems is a well-known problem in control theory that has been studied from different perspectives. Because the system state variables are generally not always available, state estimation is an essential task in many control applications, which is why this problem has attracted considerable attention from researchers and is the main focus of this thesis. LÄS MER

4. 3. Deep neural networks for electromagnetics applied to optimization and inverse problems

   Författare :Simon Stenmark; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; calibration; optimization; Inverse problems; normalization; deep learning; neural networks;

   Sammanfattning : This thesis explores the possibilities to complement full-wave electromagnetic solvers with fully-connected neural networks. We emphasize problems that must be solved a very large number of times in a limited parameter domain. We present and evaluate the normalization method ForwardNorm. LÄS MER

5. 4. Dynamic threshold generators for robust fault detection

   Författare :Michael Bask; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Control Engineering;

   Sammanfattning : Detection of faults, such as clogged valves, broken bearings or biased sensors, has been brought more and more into focus during the last few decades. There are two main reasons why faults are important to detect at an early stage. LÄS MER

7. 5. Ontogeny of perception of maternal and nosocomial stimuli in infants

   Författare :Jakob Frie; Karolinska Institutet; Karolinska Institutet; []
   Nyckelord :;

   Sammanfattning : Preterm born infants in neonatal units experience unusual sensory inputs that can shape and nurture their developing brains differently from full-term healthy newborn infants. To improve the care of preterm infants and their neurodevelopmental outcomes, we need to understand how the brain functions at different developmental stages and implement this knowledge into clinical care and follow-up programs. LÄS MER