What is the difference between positive feedback control system negative feedback control system?

Answer 1

Positive feedback speeds up reactions and negative feedback slows them down.

In electronics and control systems, positive feedback means the feedback gets added to the input and then goes as output. And negative feedback means that the output is input minus feedback (from output). This is the most basic and layman answer I can think of.

In social and business terms, a positive feedback means a good response ( a praise for a product, or interest generation among the clients) and a negative feedback means a bad response (unhappy clients, criticism and the like ).

Answer 2

In negative feedback, as more of the hormone is produced, it causes a decrease in its secretion while in positive feedback, as more of the hormone is produced it stimulates further secretion of the hormone.

Answer 3

An example negative feedback is too much blood glucose so insulin is released to lower it that is negative feedback. Negative feedback does the opposite of what is happening. Positive feedback does the same thing to and endpoint, an example of this is labor, hormones are sent out to start contractions then even more is added until the endpoint which is the birth of a baby.

Answer 4

Negative feedback is when a downstream product negatively feedsback on an upstream process. An example would be eating - as you eat, food accumulates in your stomach and negatively feedbacks to make you not hungry. Countless enzymes are also negatively inhibited by their products or downstream products.

Positive feedback is far less common, at least in biological systems and leads to 'runaway train' events typically ending in an explosive event, such as giving birth. negative feedback are mechanisms functioning primarily to restore the body to homeostasis or balance. they occur constantly within the body as it tries to adjust to events inside it. example if your blood pressure is high, the body usually responds by dilating the blood vessels, decreasing the heart rate, etc. to lower the BP. positive feedback on the other hand, allows the event to go on continually until such time it stops. this is far less common and is not considered a homeostatic mechanism. the most concrete example of this is giving birth. the vagina expands continually until such time the baby is expelled. - thoughtfulobserver.

Answer 5

Negative feedback means that a push results in a pull ... thus giving stability.

Positive feedback means that a push results in a push ... thus the output becomes greater each time, resulting in overload and instability. (the squealing loudspeaker)

Answer 6

In terms of physiology an example of a negative feedback mechanism would be the stretch receptors in muscle which send signals back to nerves causing the movement to stop the signals. A positive feedback mechanism example would be the beginning of the action potential. The initial influx of sodium ions depolarize the cell which cause even more sodium channels to open. To generalize positive feedback mechanisms are less common and never unlimited.

Answer 7

A device that is part of a feedback loop receives an input, responds to the input and creates an output that is connected back to the input; the device is responding to its own output. The condition is called a feedback loop. If the connection is such that an increase in output creates an input that acts to reduce that output, the loop is called negative feedback. If the connection is such that an increase in output creates an input that acts to increase the output further, the loop is called positive feedback.

Answer 8

positive feedback is when something causes itself - e.g. global warming leads to more water in the atmosphere, water is a greenhouse gas so contributes to global warming.

negative feedback is when something inhibits itself - e.g. water freezing releases energy. If you supercool a long tube of water, then touch its top to make it freeze the ice will propagate down the tube, but the ice at the top will quickly melt because of the energy released by the ice below it freezing.

Answer 9

In negative feedback systems, the response reverses a change in a controlled condition, and in positive feedback systems, the response strengthens the change in a controlled condition.