A practical method for assessing the performance of control loops subject to random load changes
✍ Scribed by Timothy I. Salsbury
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 509 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0959-1524
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✦ Synopsis
A method is described for detecting load changes and characterizing subsequent responses in single-input-single-output (SISO) feedback control loops. The method is computationally simple and suitable for on-line implementation in a controller. Load changes are detected using a statistical change detection procedure that uses zero-crossings information to account for autocorrelation. Responses are characterized by a normalized index that can be related to a damping ratio in a second-order model. Results are presented from applying the method to data from a simulated control loop and two temperature control loops in a large office building.