1. This is an example of negative feedback and of proportional control . 2. Although proportional control is simple to understand, it has drawbacks. 3. The SE series had proportional control and used a pistol grip style remote control. 4. These had the advantage of proportional control . 5. This method is called Proportional control . 6. "' Proportional control "'is how most drivers control the speed of a car. 7. Proportional control overcomes this by modulating the output to the controlling device, such as a continuously variable valve.8. The pilot valve gives a proportional control over main valve flowrate, with the opening being controlled, slow and gradual. 9. Glenn switched control to manual-proportional control mode and moved " Friendship 7 " back to the proper attitude. 10. Alternates to proportional control are proportional-integral ( PI ) control and proportional-integral-derivative ( PID ) control.
