Gain Scheduling - Adaptive Control

-
If we are able to calculate the variation in process dynamics i.e. if the variation is measurable, then we go for an Gain scheduling.

Considering the previous example in Adaptive Control - Introduction, the effect of gravity depends on altitude in a flight control, hence the effect of gravity at different altitudes can be determined and can be used as scheduling variable. These scheduling variables determine the control parameters. Hence suitable control parameters are fed to the controller depending on the change in altitude.

Block Diagram Gain Scheduling

This also consist of 2 loops i.e. normal feed back loop and parameter adjustment loop.
                       

Comments

Post a Comment

Popular posts from this blog

Adaptive Control - Introduction

-
Image
Adaptive control is a control methodology where the controller can adapt itself to new circumstances, that is it can adjust its characteristics for the changing environment so that the overall system performance is not affected. Need for Adaptive Control The main reason for switching to adaptive control is that, most of process are non linear by nature.  In conventional control system, the output is made to follow the set-point by compensating the errors.  This is possible only up till a linear range of the process, once the process exceeds the linear range, the conventional control system fails to control. The disturbance that occur can be unpredictable and its magnitude may vary with time. These effects cannot be controlled by a normal control system, hence we go for an adaptive control. For example, let us consider a flight control system, the control dynamics change with speed, altitude, angle of flight, effect of gravity, surrounding weather, etc.. As we know that the effect of g
Read more