Sökning: "extended vector control"
Visar resultat 1 - 5 av 12 avhandlingar innehållade orden extended vector control.
1. Feeding Strategies Based on Probing Control for E. coli and V. cholerae Cultivations
Sammanfattning : The recombinant DNA techniques have made it possible to produce many different proteins for a wide range of applications. The vector encoding for the recombinant protein is often inserted in the bacterium E. coli as it is a well studied and a well-known organism. To achieve a high productivity, it is important to reach a high cell density. LÄS MER
2. Analysis and Control Aspects of Brushless Induction Machines with Rotating Power Electronic Converters
Sammanfattning : This thesis deals with the steady-state, dynamic and control aspects of new type of brushless configuration of a doubly-fed induction machine in which the slip rings and carbon brushes are replaced by rotating power electronics and a rotating exciter. The aim is to study the stability of this novel configuration of the generator under mechanical and grid disturbances for wind power applications. LÄS MER
3. Grid-Connected Voltage Source Converter - Control Principles and Wind Energy Applications
Sammanfattning : The thesis focuses on a forced-commutated voltage source converter (VSC) connected to a grid in a wind energy application. The work consists of four parts. The first part addresses the type of electrical system which should be used in a wind turbine. LÄS MER
4. Concepts and Algorithms for Non-Linear System Identifiability
Sammanfattning : Recently, commutative algebra and differential algebra have come to use as mathematical tools for solving problems in automatic control. We will use these tools to answer questions regarding identifiability for models given as a set of differential polynomials. LÄS MER
5. Implementation, identification, and adaptation of Preisach like hysteresis models
Sammanfattning : The extended generalized Prandtl-Ishlinskii model (XGPI) of hysteresis has a wide applicability, partly because of its capability of modelling highly asymmetric hystereses. For a given parameterization, it is typically identified using non-linear least squares optimization with concomitant problems of convergence, dependence on initial parameter guess and local minima. LÄS MER