IMC tuned PID controller’s present excellent set
point tracking but sluggish disturbance elimination, because of
introduction of slow process pole introduced by the conventional
filter. In many industrial applications setpoint is seldom changed
thus elimination of disturbance is important. The paper presents
an improved IMC filter cascaded with Controller PID tuned by
internal model principle (IMC-PID) for effective elimination of
disturbance and healthy operation of non-regular first order
process such as processes with no delay. The suggested filter
eliminates the slow dominant pole. The present study shows that
the recommended IMC filter produces excellent elimination of
disturbance irrespective of where the disturbance enters the
process and provides acceptable robust performance to model
disparity in provisions of maximum sensitivity in comparison with
other methods cited in the literature. The advantages of the
suggested technique is shown through the simulation study on
process by designing the IMC tuned PID controllers to maintain
identical robustness in provisions of maximum sensitivity. The
integral error criterion is used to estimate the performance. The
recommended filter produces excellent response irrespective of
nature of the process.
Design of IMC Tuned PID Controller for First Order Process with No Delay
