Question

how dose narrowimg the deadband effect a system?

Answer 1

A deadband is a band of input values in the domain of a transfer function in a control system or signal processing system where the output is zero (the output is 'dead' - no action occurs).

Let us understand how narrowing deadband affects a system by an example.

Suppose there is a automatic door opening system which is actuated by a pressure sensor

( pressure is input and opening of door is output).

In the first condition let 100pa pressure be needed to open the door so the deadband in this condition is from 0 to 100pa

( door will not open for this range ).

Now the deadband is narrowed to 0 to 50 pa, under this condition even a pressure slightly greater than 50pa can open the door.

Thus, narrowing the deadband results in output even at smaller value of input than earlier.

Note- sometimes narrowing a deadband can cause negative impact on the system also.