Adaptive Control

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1. Regulatory Control:

1. Regulatory Control Process Input Parameters Output Variables Performance Measure Controller Performance target level Adjustments to input parameters Measured variables Index of Performance

PowerPoint Presentation:

Process Output Variables Input Parameters Disturbance Controller Feed forward control elements Performance target level Measured Variables Index of Performance 2. Feed forward control, combined with feedback control Adjustments to input parameters

PowerPoint Presentation:

Process Output Variables Input Parameters Disturbance Controller (1) Index of Performance (IP) 3. Steady-state (open-loop) optimal control Adjustments to input parameters Performance Measure (3) Algorithm to determine optimum input parameter values (2) Mathematical model of process & IP

PowerPoint Presentation:

Process Output Variables Input Parameters Modification 3. Steady-state (open-loop) optimal control Adjustments to input parameters Performance Measure Measured Variables Index of performance Decision Identification Adaptive Controller

Adaptive Control:

Adaptive Control Identification Function : In this function, the current value of the index of performance of the system is determined, based on measurements collected from the process. Since the environment changes over time, system performance also changes. Accordingly the identification function must be accomplished more or less continuously over time during system operation. Decision Function: Once system performance has been determined, the next function is to decide what changes should be made to improve performance. The decision function is implemented by means of the adaptive systems programed algorithm. Depending on this algorithm, the decision may be to change one or more input parameters to the process to alter some of the internal parameters of the controller or other changes.

Contd..,:

Contd.., Modification function: The third function of adaptive control is to implement the decision. Whereas decision is a logic function, modification

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