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Part Create Equation Linear State Equation

Ribbon menu → Elements tab → System Elements → Linear State Equation
or
(Classic) Build → System Elements → Linear State Equation → New
Creates a linear state equation.
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For the option:
Do the following:
Linear State Equation Name
Enter the name that you want assigned to the linear state equation.
Adams Id
Assign a unique ID number to the equation. See Adams Solver ID.
Comments
Add any comments about the equation to help you manage and identify it. See Comments.
X State Array Name
Enter the array element that defines the state array for the linear system. The array must be a states (X) array. It cannot be used in any other linear state equation, general state equation, or transfer function.
U Input Array Name
Enter the array element that defines the input (or control) array for the linear system. Entering an inputs (U) array is optional. The array must be an inputs (U) array. If you enter an inputs (U) array, you must also specify either a B input matrix, a D feedforward matrix, or both.
The B and D matrices must have the same number of columns as there are elements in the inputs (U) array.
Y Output Array Name
Enter the array element that defines the column matrix of output variables for the linear system. Entering an outputs (Y) array is optional. If you enter an outputs (Y) array, you must also specify a C output matrix or a D feedforward matrix. The corresponding matrix elements must have the same number of rows as there are elements in the outputs (Y) array. It also must be an outputs (Y) array, and it cannot be used in any other linear state equation, general state equation, or transfer function.
IC Array Name
Enter the array element that defines the column matrix of initial conditions for the linear system. Entering the IC array is optional. The IC array must have the same number of elements as the states (X) array (equal to the number of rows in the A state matrix). When you do not specify an IC array, Adams Solver initializes all states to zero.
A State Matrix Name
Enter the matrix data element that defines the state transition matrix for the linear system. The matrix must be a square matrix (same number of rows and columns), and it must have the same number of columns as the number of rows in the states (X) array.
B Input Matrix Name
Enter the matrix data element that defines the control matrix for the linear system. The B input matrix must have the same number of rows as the A state matrix and the same number of columns as the number of elements in the inputs (U) array.
Entering a B input matrix is optional. If you enter a B input matrix, you must also include an inputs (U) array.
C Output Matrix Name
Enter the matrix data element that defines the output matrix for the linear system. The C output matrix must have the same number of columns as the A state matrix and the same number of rows as the number of elements in the outputs (Y) array. Entering a C output matrix is optional. If you enter a C output matrix, you must also include an outputs (Y) array name.
D Feedforward Matrix Name
Enter the matrix data element that defines the feedforward matrix for the linear system. The D feedforward matrix must have the same number of rows as the number of elements in the Y output array and the same number of columns as the number of elements in the inputs (U) array.
When you enter a D feedforward matrix, you must also include both a Y output matrix and an inputs (U) array.
Static Hold
Select yes to hold states at the constant value determined during static and quasi-static simulations; select no if they can change. Learn about Controlling Equilibrium Values When Using System Elements.