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Course 60851
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The ultimate period method is also known as the Ziegler-Nichols closed loop tuning method.
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A stand-alone controller is a controller that has its power supplies, input signal processing, controller functions, output signals, and displays contained in the same case.
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Processes with a lot of dead time must be tuned to respond slowly and minimize overshoot.
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The tuning map method is a procedure for controller tuning that compares the process curves to one of numerous typical closed loop response curves.
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Static response time is the length of time required for the PV to remain within 5% of its ultimate value following a step input change.
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The ultimate period (Tu) is the cycle time at the point of oscillation.
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A one-quarter decay ratio is a response where the amount of undershoot decays to one-fourth of the previous amplitude of the overshoot every whole cycle after being upset by a disturbance.
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A self-tuning controller is a controller that has built-in algorithms or pattern recognition techniques that periodically test the process and make changes to the controller tuning settings while the process is operating.
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Controller tuning is the process of determining the tuning ___ to obtain a desired controller response to process disturbances.
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Common controller performance standards are decay ratio, overshoot, and ___.
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