Comparison of two identification methods for PID controller tuning

✍ Scribed by Jietae Lee; Su Whan Sung

• Publisher: American Institute of Chemical Engineers
• Year: 1993
• Tongue: English
• Weight: 201 KB
• Volume: 39
• Category: Article
• ISSN: 0001-1541
• DOI: 10.1002/aic.690390418

✦ Synopsis

Proportional integral and derivative (PID) controllers are still used widely in industry. For automatic tuning of the PID controllers, simple methods, instead of elaborate adaptive methods, are usually used. Significant efforts have been lately devoted to easy testing and better tuning.

Yuwana and Seborg (1982) identified the first-order plus time-delay model from closed-loop testing with a P controller.

Their method has been refined by Rodriguez and Jutan (1984) and Lee (1989). Because the gain of a P controller is not known in advance, some trial tests are required. Second-order plus time-delay model can be also obtained with this method (Lee et al., 1990). Astrom and Hagglund (1984) proposed a relay feedback method to determine the ultimate period and the ultimate gain for Ziegler-Nichols-type tuning. The method, however, inherits