Disadvantages Of Adaptive Control
Advanced Control system is defined as broad range of techniques and technologies was implemented together with industrial process control systems. Normally this advanced control system deployed optional in addition basic process control. Moreover this process controls are typically added subsequently. Under these types of control there are many types. Such as compressor control, multivariable model predictive control, inferential control, cascade control, feed forward control, feedback control, cascade control, adaptive control, ratio control and differential adaptive control.
Adaptive Control System
Adaptive control is a general control strategy for control problems where the process or operating conditions can change significantly
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There is no limit station of the number control parameters. Her first controls in STREGX regulator have many 20 regulator parameter which can adapted automatically. This also called a truly' adaptive regulator.
Advantages of Adaptive Control System
There are many advantages using the adaptive controller. In the adaptive control system, many more regulator parameters can be used. Apart from that the controller in adaptive control system adapts easily to the process at start up. The controller also response to change that happen in the procesNormally this system used in most efficiency way, therefore no manual tuning of regulator parameter is not necessary here. The control action usually based on the predicted future process behavior and its accuracy normally improved only by 50-75%. The regulator in the adaptive system control normally operates at much a larger production range. It’s very simple to design.
Disadvantages of using Adaptive Control system
Stability of the adaptive control system is not treated rigorously. The high gain observes is needed to avoid full state measurement. Other than that, the system relatively slows convergence. High cost is produced and the process is very complex. It took long period to
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Normally in cascade control the secondary controller only corrects the disturbances that occur in the secondary controller loop before the can affect the main variable or primary one. Apart from that it also can improve the time lag and the dead time. Apart from that, it also improves the gain variations in the secondary loop are corrected within the loop. The secondary loop enables exact manipulation of the flow of mass or energy of primary controller. Apart from it’s also reduced the valve characteristics. The other beneficial of cascade control system is increase the natural frequency of the system. The cascade control system also gets faster recovery from disturbances. The system has the better control on primary variable. It also used to integrate multiple sensor readings. It can combine with forward control or other forms of controls
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