Physical Modeling

Model physical systems using Simscape™ software

To model physical systems in the Simulink^® environment, consider using Simscape software.

Simscape extends Simulink with tools for modeling systems spanning mechanical, electrical, hydraulic, and other physical domains as physical networks. It provides fundamental building blocks from these domains to let you create models of custom components. The MATLAB^® based Simscape language enables text-based authoring of physical modeling components, domains, and libraries.

Topics

Basic Principles of Modeling Physical Networks (Simscape)
Describes concepts behind the Physical Network approach, Through and Across variables, and physical connections.
Essential Steps for Constructing a Physical Model (Simscape)
This example contains the basic workflow and detailed instructions for building and simulating a simple physical model.
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.

Related Information

Simscape

Featured Examples

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.

(Simscape)

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.

(Simscape)

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.

(Simscape)

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.

(Simscape)