Sökning: "JModelica.org"

Hittade 5 avhandlingar innehållade ordet JModelica.org.

1. 1. A Software Framework for Implementation and Evaluation of Co-Simulation Algorithms

   Författare :Christian Andersson; Matematik LTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Simulation; Co-Simulation; Assimulo; JModelica.org;

   Sammanfattning : In this thesis, simulation of coupled dynamic models, denoted sub-systems, is analyzed and described in a co-simulation context. This means that the respective coupled systems contain their own internal integrator, hidden from the coupling interface. Co-Simulation is an interesting and active research field where industry is a driving force. LÄS MER

3. 2. Physical Modeling and Control of Low Temperature Combustion in Engines

   Författare :Anders Widd; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The topic of this thesis is model-based control of two combustion engine concepts, Homogeneous Charge Compression Ignition (HCCI) and Partially Premixed Combustion (PPC), using physics-based models. The studied combustion concepts hold promise of reducing the emission levels and fuel consumption of internal combustion engines. LÄS MER

4. 3. Optimization of Low-Level Controllers and High-Level Polymer Grade Changes

   Författare :Per-Ola Larsson; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; process control; PID control; robustness; noise sensitivity; dynamic optimization; polymerization; Modelica;

   Sammanfattning : 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 signal activity due to measurement noise is presented and used when optimizing and comparing PI/PID controllers with measurement filters of different orders. LÄS MER

5. 4. Numerical and Symbolic Methods for Dynamic Optimization

   Författare :Fredrik Magnusson; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; dynamic optimization; differential-algebraic equations; Modelica; direct collocation; block-triangular ordering;

   Sammanfattning : Mathematical optimization is becoming increasingly important for engineering in general and control in particular. This thesis deals with numerical methods, primarily direct collocation, and symbolic methods, primarily block-triangular ordering and tearing, for numerical solution of general dynamic optimization problems involving dynamical systems modeled by large-scale differential-algebraic equations (DAE). LÄS MER

7. 5. Modeling and Optimization for Critical Vehicle Maneuvers

   Författare :Kristoffer Lundahl; Lars Nielsen; Mathias Lidberg; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : As development in sensor technology, situation awareness systems, and computational hardware for vehicle systems progress, an opportunity for more advanced and sophisticated vehicle safety-systems arises. With the increased level of available information---such as position on the road, road curvature and knowledge about surrounding obstacles---future systems could be seen utilizing more advanced controls, exploiting at-the-limit behavior of the vehicle. LÄS MER