Robust control

A Robust Control designates a fixed controller, which in design and design parameters, special emphasis is placed on ensuring that he, despite deviation of the plant behavior assumes a nominal desired performance characteristics. By " solid controller" is understood to mean a controller, whose structure and parameters are independent of time and the parameters. It is assumed that the limits within which the parameter can vary, are known. " Requested features " can thereby be request to the settling time, the amount of overshoot or pole position. The desired properties can depend on the parameters present in each case. [ FOE: RT 1]

Causes of the changing system behavior are for example:

• The controlled system is not fully known [ LUN: RT1 1]
• The design model was developed from the simplification of a more complex model, in particular by linearization around different operating points [ LUN: RT1 1]
• The control structure is changing because of the failure of sensors [ ACK: RR 1 ]

The goal to achieve desired properties, despite varying or inexact known distance behavior is also sought by adaptive controllers, in which case the controller parameters can be adjusted depending on the operating point in the simplest case.

A method for Robust Control represents the H-infinity control

Documents

• J. Ackermann: Robust Control. Springer -Verlag, 1993.

• Otto Föllinger: Control Engineering, Introduction to the methods and their application. 8th edition. Hüthig Verlag, Heidelberg 1994, ISBN 3-7785-2336-8.

• January Lunze: Control Engineering 1: System Theoretical foundations, analysis, and design einschleifiger regulations. 3rd edition. Springer Verlag, Heidelberg 2001, ISBN 3-540-42178-5.