Adaptive Control System
A general control strategy for control problems where the process or operating conditions can change significantly and unpredictably.
Example: Catalyst decay, equipment fouling
Many different types of adaptive control strategies have been proposed.
Self-Tuning Control (STC): –
A very well-known strategy and probably the most widely used adaptive control strategy.
Basic idea: STC is a model-based approach. As process conditions change, update the model parameters by using least squares estimation and recent u & y data.
Note: For predictable or measurable changes, use gain scheduling instead of adaptive control Reason: Gain scheduling is much easier to implement and less trouble prone.