Modelica sample
时间: 2023-07-31 09:05:38 浏览: 64
Here is a simple example of a Modelica model that represents a simple mass-spring-damper system:
```
model MassSpringDamper
// Parameters
parameter Real m = 1; // Mass (kg)
parameter Real k = 10; // Spring constant (N/m)
parameter Real c = 1; // Damping coefficient (N*s/m)
// Variables
Real x; // Displacement (m)
Real v; // Velocity (m/s)
Real a; // Acceleration (m/s^2)
// Equations
equation
// Newton's second law
m*a = -k*x - c*v;
// Definition of velocity
v = der(x);
// Definition of acceleration
a = der(v);
// Initial conditions
initial equation
x = 0.1;
v = 0;
end MassSpringDamper;
```
This model defines a mass-spring-damper system with parameters for the mass, spring constant, and damping coefficient. The model also defines variables for the displacement, velocity, and acceleration of the mass. The equations of motion are defined using Newton's second law and the definitions of velocity and acceleration. Finally, initial conditions are specified for the displacement and velocity of the mass.