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Modélisation physique

Modéliser des systèmes physiques avec Simscape™

Pour modéliser des systèmes physiques dans l'environnement Simulink^®, vous pouvez envisager d'utiliser le software Simscape.

Simscape vient compléter Simulink par des outils permettant de modéliser des systèmes couvrant les domaines mécaniques, électriques, hydrauliques et d'autres domaines physiques tels que les réseaux physiques. Il propose des blocs de base correspondant à ces domaines pour faciliter la création de modèles de composants personnalisés. Basé sur MATLAB^®, le langage Simscape permet la création de composants, de domaines et de bibliothèques pour la modélisation physique.

Rubriques

Basic Principles of Modeling Physical Networks (Simscape)
Describes concepts behind the Physical Network approach, Through and Across variables, and physical connections.
Étapes essentielles pour créer un modèle physique (Simscape)
Cet exemple contient le workflow de base et des instructions détaillées pour créer et simuler un modèle physique simple.
Essential Physical Modeling Techniques (Simscape)
Brief summary of physical modeling rules and techniques.
Modeling Best Practices (Simscape)
How to use best practices in your model architecture to avoid numerical simulation issues.

Informations connexes

Simscape

Exemples présentés

Double Mass-Spring-Damper in Simulink and Simscape

Two models of a double mass-spring-damper, one using Simulink® input/output blocks and one using Simscape™ physical networks.

Permanent Magnet DC Motor

This model is based on a Faulhaber Series 0615 DC-Micromotor. The parameters values are set to match the 1.5V variant of this motor. The model uses these parameters to verify manufacturer-quoted no-load speed, no-load current, and stall torque.

Brayton Cycle (Gas Turbine) with Custom Components

Models a gas turbine auxiliary power unit (APU) based on the Brayton Cycle. The Compressor and Turbine blocks are custom components based on the Simscape™ Foundation Gas Library. The power input to the system is represented by heat injection into the combustor; actual combustion chemistry is not modeled. A single shaft connects the compressor and the turbine so that the power from the turbine drives the compressor. The APU is a free turbine that further expands the exhaust stream to produce output power.

Two-Phase Fluid Refrigeration

Models a vapor-compression refrigeration cycle using two-phase fluid components. The compressor drives the R-134a refrigerant through a condenser, an expansion valve, and an evaporator. The hot gas leaving the compressor condenses in the condenser via heat transfer to the environment. The pressure drops as the refrigerant passes through the expansion valve. The drop in pressure lowers the saturation temperature of the refrigerant. This enables it to boil in the evaporator as it absorbs heat from the refrigerator compartment. The refrigerant then returns to the compressor to repeat the cycle. The controller turns the compressor on and off to maintain the refrigerator compartment temperature within a band around the desired temperature.