13 Facts About Negative feedback

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, whether caused by changes in the input or by other disturbances.

Whereas positive feedback tends to lead to instability via exponential growth, oscillation or chaotic behavior, negative feedback generally promotes stability.

Negative feedback tends to promote a settling to equilibrium, and reduces the effects of perturbations.

Negative feedback is widely used in mechanical and electronic engineering, and within living organisms, and can be seen in many other fields from chemistry and economics to physical systems such as the climate.

General negative feedback systems are studied in control systems engineering.

One such Negative feedback system is the interaction between solar radiation, cloud cover, and planet temperature.

Term "Negative feedback" was well established by the 1920s, in reference to a means of boosting the gain of an electronic amplifier.

In contrast, positive Negative feedback is Negative feedback in which the system responds so as to increase the magnitude of any particular perturbation, resulting in amplification of the original signal instead of stabilization.

One use of Negative feedback is to make a system self-regulating to minimize the effect of a disturbance .

Which shows that the Negative feedback reduces the effect of the disturbance by the 'improvement factor' .

An example of the use of negative feedback control is the ballcock control of water level, or a pressure regulator.

In modern engineering, negative feedback loops are found in engine governors, fuel injection systems and carburettors.

Hormone secretion regulated by the negative feedback loop: when gland X releases hormone X, this stimulates target cells to release hormone Y When there is an excess of hormone Y, gland X "senses" this and inhibits its release of hormone X As shown in the figure, most endocrine hormones are controlled by a physiologic negative feedback inhibition loop, such as the glucocorticoids secreted by the adrenal cortex.