Boundary conditions

Boundary conditions

The term boundary conditions in an IDA system means two things:

1. The set of variables in the system which are given (as opposed to calculated by the model);
2. The values assigned to the set of given variables. For dynamic simulations the values may be time dependent.

The boundary condition for a given variable is established in one of two principal ways:

• As an explicitly given value or as a reference to the initial value of the variable (for constant conditions);
• As a causal connection to a boundary object.

The following types of boundary objects are available in IDA applications:

See Connect a variable for instructions on how to establish a boundary condition.