*ControlSISO()

Defines a single-input, single-output, transfer function as a ratio of two polynomials in the Laplace domain when used with the associated ARRAY statements.

Syntax

*ControlSISO(siso_name,"siso_label")

Arguments

siso_name: The variable name for the ControlSISO.; Data type: varname
siso_label: The descriptive label for the ControlSISO.; Data type: label

Example

*BeginMdl(model5, "MBD Model" ) 
 *ControlSISO(siso_0, "ControlSISO 0" )
 *SolverVariable(sv_0, "Reference Speed" )
 *ActionReactionForce(frc_0, "Force 0", ROT, MODEL.b_0, 
 MODEL.B_Ground, MODEL.p_0, 
 Global_Frame )
 *SetSolverVariable(sv_0, 3)
 *SetForce(frc_0, 0, 0, '{MODEL.siso_0.OUTPUT}')
 *SetControlSISOCoeffs(siso_0, NUMER, 2, 10.00, 1.00, 
 DENOM, 2, 0.00, 1.00)
 *SetControlSISOInput(siso_0, '-WZ({MODEL.b_0.cm.idstring})
 +{sv_0.value}')
*EndMdl()

Context

*BeginMDL()

*DefineAnalysis()

*DefineSystem()

Properties

Table 1.
Property	Returns Data Type	Description
varname	string	The variable name of the ControlSISO.
state	boolean	Control state (true or false).
id	long integer	The ID of the entity when exported to the solver input deck.
label	string	The descriptive label of the ControlSISO.
input	real	The input of the ControlSISO.
output	real	The output of the ControlSISO.
u_var		The implicit solver variable.

Comments

The *ControlSISO() statement can be used to insert a controller directly within the MDL model, which the solver includes directly. For controllers such as Proportional-Derivative, this prevents the need for co-simulation or for the creation of direct differential equations.