System elements allow you to add your own algebraic and differential equations, and corresponding
states, to your model. Adams/Solver solves your equations simultaneously with the equations it generates
from other modeling elements.
Your user-defined equations can depend on any states in the model, such as time, part motions, forces, or
other user-defined states. In turn, you can reference your states in forces, system elements, and other
System elements enable you to model system components that are not as easily represented by standard
Adams/View modeling objects, such as parts, constraints, and forces. They are useful for modeling
components or subsystems that have dynamics of their own. You can use system elements to represent a
control system, for example, or to model the dynamics of an electro-mechanical, hydraulic, or pneumatic
actuator. You can also use system elements to compute simulation output. For example, you might
calculate the energy dissipated in a damper.
The system elements are listed in the table below.
Example of Using System Element
We've provided a complete example of using system elements in a model in the examples directory of
your MD Adams installation directory. The example contains the following elements:
• State variables
Implicit and explicit differential equations
• Linear state equations
Differential equation Differential equation that describes a user-defined variable in terms of its time
System of explicit differential and (optionally) algebraic equations in state-
space form. You use array data elements to specify inputs, outputs, and
Linear state equation System of constant coefficient, explicit, differential, and algebraic equations in
the classic state-space format when used with associated array and matrix data
Single-input, single-output transfer function as