SPRUIK4A September   2018  – June 2019 TMS320F280021 , TMS320F280021-Q1 , TMS320F280023 , TMS320F280023-Q1 , TMS320F280023C , TMS320F280025 , TMS320F280025-Q1 , TMS320F280025C , TMS320F280025C-Q1 , TMS320F280040-Q1 , TMS320F280040C-Q1 , TMS320F280041 , TMS320F280041-Q1 , TMS320F280041C , TMS320F280041C-Q1 , TMS320F280045 , TMS320F280048-Q1 , TMS320F280048C-Q1 , TMS320F280049 , TMS320F280049-Q1 , TMS320F280049C , TMS320F280049C-Q1 , TMS320F28075 , TMS320F28075-Q1 , TMS320F28076 , TMS320F28374D , TMS320F28374S , TMS320F28375D , TMS320F28375S , TMS320F28375S-Q1 , TMS320F28376D , TMS320F28376S , TMS320F28377D , TMS320F28377D-Q1 , TMS320F28377S , TMS320F28377S-Q1 , TMS320F28378D , TMS320F28378S , TMS320F28379D , TMS320F28379D-Q1 , TMS320F28379S

 

  1.   C2000 Software Frequency Response Analyzer (SFRA) Library and Compensation Designer in SDK Framework
    1.     Trademarks
    2. 1 Introduction
    3. 2 Installing the SFRA Library
      1. 2.1 SFRA Library Package Contents
      2. 2.2 How to Install the SFRA Library
    4. 3 Module Summary
      1. 3.1 SFRA Library Function Summary
      2. 3.2 Principle of Operation
      3. 3.3 Per Unit Format
      4. 3.4 Floating Point (Singe Precision)
        1. 3.4.1 Object Definition
        2. 3.4.2 Module Interface Definition
        3. 3.4.3 Adding SFRA Library to the Project
        4. 3.4.4 Adding Support for SFRA GUI
      5. 3.5 Script for Importing Frequency Response and Designing Compensation
      6. 3.6 SFRA GUI Options and How to Run
    5. 4 Compensation Designer
      1. 4.1 Launching Compensation Designer
        1. 4.1.1 Standalone From SFRA GUI Folder
        2. 4.1.2 From Solution Adapter Page
      2. 4.2 Compensation Style and Number
    6. 5 Case Study
      1. 5.1 Plant TF Extraction
      2. 5.2 Designing Compensator Using Compensation Designer
      3. 5.3 OL Measurement
      4. 5.4 Comparing SFRA Measured Frequency Response Versus Modeled
    7. 6 Running Software Test Bench Example for SFRA
    8. 7 Using SFRA Without SFRA GUI Integration
    9. 8 FAQ
  2.   Revision History

3.2 Principle of Operation

The software frequency response analyzer is based on the principle of small signal sinusoidal injection. A small signal is injected on the reference of the controller, as shown in Figure 3, and the frequency response on feedback and controller outputs are calculated. This provides the plant frequency response characteristics and the open loop frequency response of the closed loop system.

FRA_principle_oper_spruhz5.gifFigure 3. SFRA Principle of Operation
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