The Edit Design Requirement dialog box allows you to exactly position constraint segments and to edit other properties of these constraints. The dialog box has two main components:
An upper panel to specify the constraint you are editing
A lower panel to edit the constraint parameters
The upper panel of the Edit Design Requirement dialog box resembles the image in the following figure.
In the context of the Control System Designer app in Control System Toolbox™, Design requirement is associated with both the analysis plot or editor that contains the requirement and the particular requirement itself. To edit other constraints within the app, select another design requirement from the drop-down menu.
The particular parameters shown within the lower panel of the Edit Design Requirement dialog box depend on the type of constraint/requirement. In some cases, the lower panel contains a grid with one row for each segment and one column for each constraint parameter. The following table summarizes the various constraint parameters.
Edit Design Requirement Dialog Box Parameters
|Time||Upper and lower time response bounds on step and impulse response plots||Defines the time range of a segment within a constraint/requirement.|
|Amplitude||Upper and lower time response bounds on step and impulse response plots||Defines the beginning and ending amplitude of a constraint segment.|
|Slope (1/s)||Upper and lower time response bounds||Defines the slope, in 1/s, of a constraint segment. It is an alternative method of specifying the magnitude values. Entering a new Slope value changes any previously defined magnitude values.|
|Final value||Step response bounds||Defines the input level after the step occurs.|
|Rise time||Step response bounds||Defines a constraint segment for a particular rise time.|
|% Rise||Step response bounds||The percentage of the step's range used to describe the rise time.|
|Settling time||Step response bounds||Defines a constraint segment for a particular settling time.|
|% Settling||Step response bounds||The percentage of the final value that defines the settling region used to describe the settling time.|
|% Overshoot||Step response bounds||The percentage amount by which the signal can exceed the final value before settling.|
|% Undershoot||Step response bounds||Defines the constraint segments for a particular percent undershoot.|