[Q&A Question 242] 2017.08.31
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【Q&A Question 242】August 31, 2017: What do P, I, and D mean in PID control instruments? (Unless otherwise specified, all questions and answers are based on hydrogenation units.) ) The way answers are displayed for daily challenges related to ratios, integrals, and derivatives is about to change. 2017 Q&A Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657793-1-1.html 2017 Daily Question Summary Thread (updates have begun) http://bbs.hcbbs.com/thread-1657794-1-1.html 2016 Q&A Summary Thread (updates completed) http://bbs.hcbbs.com/thread-1597792-1-1.html Petrochemical Sector – “Creative Ideas for Energy Saving” campaign (the second phase is in full swing) http://bbs.hcbbs.com/thread-1666758-1-1.html (Source: Haichuan Chemical Industry Forum Website)
P is the proportion, that is, the input deviation multiplied by a coefficient. I is integration, which involves performing an integral operation on the input deviation. D is the derivative, which performs a differential operation on the input error.
P-proportion I-integration D-differentiation
P represents the proportion, that is, the input deviation multiplied by a coefficient. I represents integration, which is the process of integrating the input deviation. D is the derivative, which performs a differential operation on the input error.
P is proportion, I is integration, D is differentiation
P-proportion I-integration D-differentiation
P is the proportion, that is, the input deviation multiplied by a coefficient. I is integration, which involves performing an integral operation on the input deviation. D is the derivative, which performs a differential operation on the input error.
P is the proportional band (proportional gain), I is the integration time, and D is the derivative time