speed droop auto.

[Big Bro]

Я видел в словаре несколько вариантов перевода этого термина, но ни один из них не подходит по смыслу моего перевода. Я бы передал это значение здесь как "устройство настройки/регулирования падения оборотов", но я плохо вообще понимаю, что это, сам не технарь, поэтому прошу специалистов подсказать, что это может быть...

Speed Droop Adjustment
1. Remove the top cover from the governor to see the speed droop mechanism and adjustments, Fig. 9-15.
2. The speed droop bracket is held to the terminal lever by the slotted setscrew. When loosened, it can be moved to the front or the rear. When you move the bracket to the rear it will make more of a speed droop.
3. This lever movement for the speed droop will make a speed setting, which is a function of the terminal shaft position, with the speed decreasing as the fuel flow increases. This is speed droop.
4. Speed droop is increased by moving the bracket to the rear. Speed droop is decreased to approximately zero when the pivot pin is all the way forward. Since there is no calibration for the droop adjustment, the zero droop position can be set only by trying several settings on the engine. You can use a dial indicator on the speed droop lever during the manual rotation of the terminal shaft.
5. Speed droop is required when using the SG Woodward Governors. It must be set by operation on the engine. The speed droop bracket is adjusted to get the correct speed droop between full load and no load.

[tumanov]

Иногда, в некоторых контекстах подходит "регулятор обратной связи" иногда "коэффициент обратной связи".

[tumanov]

Небольшое "родное" объяснение про друп. Возможно, будет кому-то полезно.

What is the droop setting on an electronic governor and why is it needed?

Droop has many uses and applications in the control of engines. Without some form of droop, engine-speed control would be unstable in most cases.
- Droop is defined as a decrease in speed setting at the load increases.

Droop is expressed as a percentage of the original speed setting from no load to full load. The normal recommended percent of droop is 3% to 5%. A minimum of 2.5% is required to maintain stability in a speed-droop governor.

If, instead of a decrease in speed setting an increase takes place, the governor is showing negative droop. Negative droop will cause instability in a governor. In a system without droop, a load increase will cause the engine to slow down. The governor will respond by increasing the fuel until the engine has returned to the original speed. Due to the combined properties of inertia and power lag, the engine speed will continue to increase beyond the original speed setting, causing an overshoot in speed. The governor again will respond to decrease speed to correct for the overshoot. It will over-correct the speed in the other direction causing an undershoot. This overcorrection of speed in both directions (instability) will amplify until the engine trips out on over-speed.

This instability problem can be eliminated with droop. As the load increases, the speed setting is decreased. When the governor moves to correct for the speed decrease caused by the increased load, it will be correcting to a lower speed setting. This lower speed setting prevents the speed from overshooting.
Using Droop to Share Loads

If all engines in a droop system have the same droop setting, they will eachshare load proportionally. The amount of load each carries will depend on theirspeed settings. If the system load changes, the system speed/frequency will also change. A change in the speed setting will then be required to offset the effect of droop and return the system to its original speed/frequency. In order for each engine in the system to maintain its proportion of the shared load, the operator will need to adjust the speed set-point equally for each engine.

If all engines in a droop system do not have the same droop setting, they will not share loads proportionally with the same speed settings. If the system load changes, the system speed/frequency will also change but the percent of load oneach engine-generator set will not be changed proportionately.

The operator will need to adjust the speed set-point differently for each engine to make them carry their proportional share of the load. This could result in running out of speed set-point adjustment on an engine before it is fully loaded and limiting the system load sharing capability. It is best to have the same percent of droop set on each engine (3% to 5% is recommended).

[tumanov]

небольшое уточнение: "коэффициент отрицательной обратной связи"

[Enote]

Speed Droop - падение/снижение скорости