Difference Between Normal Feedback Controller and Robust Controller

In summary, the conversation discusses the need for a controller to compensate for system error and the concept of a robust controller that can effectively handle various circumstances. The importance of avoiding double posting is also mentioned.
  • #1
yaswanth_040
12
0
Hi all,
If we misrepresent the Model of the system say we linearized the System Model or any parameter variations like friction, Temp etc.
Will normal feedback takes care of the offset of the Model?
I was confused with Robust Controller. What is it? and How effective is it than normal?

Thank You,
Yaswanth
 
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  • #2
Simple feedback does not necessarily mean a stable system, normally it doesn't, so you may (more than likely) need some sort of controller to compensate for system error.

What is meant by the term robust is that it can compensate the system adequately in different circumstances, anticipated and (perhaps) unanticipated, without a system hindering error (or just an error you can live with).
 
  • #3


You should refrain from double posting. Check your post in the Mech Engineering forum.
 
  • #4


Sorry about that. First I thought that it was Mechanical one and then after not getting any replies I post here.
 

What is the difference between a normal feedback controller and a robust controller?

A normal feedback controller is designed to regulate a system's performance based on a specific set of conditions and assumptions. It relies on a precise mathematical model of the system and its environment. A robust controller, on the other hand, is designed to handle uncertainties and variations in the system and environment. It is more flexible and can adapt to changing conditions.

How does a normal feedback controller work?

A normal feedback controller uses a control loop to continuously measure the system's output and compare it to a desired setpoint. It then calculates the error and adjusts the control signal to minimize the error and bring the system back to the desired state.

What are the advantages of using a robust controller?

A robust controller can handle uncertainties and variations in the system and environment, making it more reliable and adaptable. It can also improve the performance of the system in non-ideal conditions and provide more stable and accurate control.

Can a robust controller be used in any system?

While a robust controller can handle uncertainties and variations, it is still limited by the system's physical constraints and design limitations. It is important to carefully consider the system's requirements and limitations before choosing a controller.

What are some common types of robust controllers?

Some common types of robust controllers include H-infinity controllers, sliding mode controllers, and model predictive controllers. Each type has its own advantages and is suitable for different types of systems and applications.

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