Control%20systems%20toolboxes%20for%20MATLAB%20-%20Tutorial

Control%20systems%20toolboxes%20for%20MATLAB%20-%20Tutorial...

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APPENDIX D: MATLAB’S GUI TOOLS TUTORIAL D.1 INTRODUCTION Readers who are studying MATLAB may want to explore the convenience of MATLAB’s LTI Viewer, the Simulink LTI Viewer, and the SISO Design Tool. SISO is an acronym for single-input single-output. Before proceeding, the reader should have studied Appendix B, the MATLAB Tutorial, including Section B.1, which is applicable to this appendix. MATLAB Version 7, MATLAB’s Control System Toolbox Version 8, Simulink Version 6, and Simulink Control Design Version 2 are required in order to use the tools described in this appendix. The M-Fles in this appendix are available elsewhere on this Web site. Consult the MATLAB Installation Guide for your platform for minimum system hardware requirements. D.2 THE LTI VIEWER: DESCRIPTION The LTI Viewer is a convenient way to obtain and view time and frequency response plots of LTI transfer functions and obtain measurements from these plots. In particular, some of the graphs the LTI Viewer can create are step and impulse responses, Bode, Nyquist, Nichols, and pole-zero plots. In addition, the values of critical points on these plots can be displayed with a click of the mouse. Table D.1 shows the critical points that are available for each plot. 1
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D.3 USING THE LTI VIEWER In this section we give you steps you may follow to use the LTI Viewer to plot time and frequency responses. If you have trouble, help is available on the LTI Viewer window menu bar and on the Status Bar at the bottom of the LTI Viewer window. Help is also available from the Help menu in the MATLAB window. Choose Full Family Product Help, then Control System Toolbox, then Tool and Viewer Reference. The following summarize the steps you may take to obtain plots from the LTI Viewer. 1. Access the LTI Viewer The LTI Viewer, shown in Figure D.1, may be accessed by typing ltiview in the MATLAB Command Window or by executing this command in an M-±le. 2. Create LTI transfer functions Create LTI transfer functions for which you want to obtain responses. The transfer functions can be created in an M-±le or in the FIGURE D.1 LTI Viewer showing right click pop-up menu TABLE D.1 Critical points available for each plot in MATLAB’s LTI Viewer Peak value: peak time or frequency Settling time Rise time Steady state value Gain/phase margins; zero dB/180 ± frequencies Pole-zero value Step ²² ² ² Impulse Bode Nyquist Nichols Pole-zero ² 2 APPENDIX D: MATLAB’s GUI Tools Tutorial
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MATLAB Command Window . Run the M-fle or MATLAB Command Window statements to place the transFer Function in the MATLAB workspace. All LTI objects in the MATLAB workspace can be exported to the LTI Viewer. 3. Select LTI transfer functions for the LTI Viewer Choose Import . . . under the File menu in the LTI Viewer window and select all LTI objects whose responses you wish to display in the LTI Viewer sometime during your current session.
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Control%20systems%20toolboxes%20for%20MATLAB%20-%20Tutorial...

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