7.2.1.6. Campbell Diagrams
A Campbell diagram represents the vibration frequencies of a system at various operating RPMs. A traditional Campbell diagram uses an equation for rotor motion to express the external force caused by the rotational frequency as a periodic function. This function is mapped on a graph, which allows you to analyze the vibration characteristics of a system. A transient Campbell diagram relies on a test or simulation of a complicated rotor system for which an equation of mode cannot be produced. To create such a diagram, you must track the increase in RPM against time and record the system response to each RPM status. Then, you must partition the data and input it into a fast Fourier transform (FFT) algorithm in order to display the frequency response on a 3D graph. If you can implement a steady RPM increase in a rotor system, then you can produce the frequency response characteristics of that system and produce a graphical representation similar to a mathematical Campbell diagram.
- 7.2.1.6.1. Transient Campbell Diagram Generation Process
- 7.2.1.6.2. Tutorial for Campbell Diagram
- 7.2.1.6.2.1. Step 1 Creating the Data for the Campbell Diagram
- 7.2.1.6.2.2. Step 2 Opening the Campbell Diagram Dialog Window
- 7.2.1.6.2.3. Step 3 Inserting Data into the Dialog Window
- 7.2.1.6.2.4. Step 4 Draw Data
- 7.2.1.6.2.5. Step 5 Setting the Time Zone
- 7.2.1.6.2.6. Step 6 Configuring the Frame Settings
- 7.2.1.6.2.7. Step 7 Configuring the FFT Settings
- 7.2.1.6.2.8. Step 8 Configuring the Plot Settings
- 7.2.1.6.2.9. Step 9 Drawing and Modifying the Campbell Diagram
- 7.2.1.6.3. Properties
- 7.2.1.6.4. Color Map and Surface Contour
- 7.2.1.6.5. Vold-Kalman Filter