Why is Negative Feedback preferred in the Control System?
Negative Feedback occurs when some function of the output of a system, process, or mechanism is fed back in a manner that tends to reduce the fluctuations in the output. It is primarily caused by either changes in the input or by other disturbances.
It is preferred as it results in better stability in a steady state, eventually promoting it to equilibrium. It also rejects any disturbance signals and reduces the effects of perturbations. It also has low sensitivity to parameter variations. Negative feedback loops in which just the right amount of correction is applied with optimum timing can be very stable, accurate, and responsive.