Simulink Control Design™ - MathWorks

Convert looptune Problem into systune Problem

Convert a set of looptune inputs for tuning a Simulink model into an equivalent set of

inputs for systune.

Suppose you have created and configured an slTuner interface, st0, for tuning with

looptune. Suppose also that you used looptune to tune the feedback loop defined in

st0 to within a bandwidth of wc = [wmin,wmax]. Convert these variables into a form

that allows you to use systune for further tuning.

[st0,SoftReqs,HardReqs,sysopt] = looptuneSetup(st0,wc,controls,measurements);

The command returns the closed-loop system and tuning requirements for the equivalent

systune command, systune(st0,SoftReqs,HardReqs,sysopt). The arrays

SoftReqs and HardReqs contain the tuning requirements implicitly imposed by

looptune. These requirements enforce the target bandwidth and default stability

margins of looptune.

If you used additional tuning requirements when tuning the system with looptune, add

them to the input list of looptuneSetup. For example, suppose you used a

TuningGoal.Tracking requirement, Req1, and a TuningGoal.Rejection

requirement, Req2. Suppose also that you set algorithm options for looptune using

looptuneOptions. Incorporate these requirements and options into the equivalent

systune command.

[st0,SoftReqs,HardReqs,sysopt] = looptuneSetup(st0,wc,Req1,Req2,loopopt);

The resulting arguments allow you to construct the equivalent tuning problem for

systune.

Convert Distillation Column Problem for Tuning With systune

Set up the control system of the Simulink® model rct_distillation for tuning with

looptune. Then, convert the setup to a systune problem, and examine the resulting

arguments. The results reflect the tuning requirements implicitly enforced when tuning

with looptune.

Create an slTuner interface to the Simulink model, and specify the blocks to be tuned.

Configure the interface for tuning with looptune by adding analysis points that define

the separation between the plant and the controller. Also add the analysis points needed

for imposing tuning requirements.

15 Alphabetical List