Talk:Proportional control

What
what is proportional integral control ? and what are applications of it ? and what is description of it ? —Preceding unsigned comment added by Special:Contributions/ (talk)
 * See PI Controller. It's a special case of PID control.I have added the link. User:Nillerdk (talk) 14:08, 10 December 2007 (UTC)

Toilet ballcock is not an example of proportional control
The ballcock feedback mechanism (to maintain water level in a toilet tank) is not "proportional," because it is highly non-linear, with hysteresis. NCdave (talk) 23:50, 17 August 2013 (UTC)

It is one, - with a high gain. Short before the maximum level is reached, the valve closes proportionally. If it would not be controlled, it would roughly shut the valve and that would be very noisy. Regelklaus (talk) 12:51, 6 December 2017 (UTC)Regelklaus