Figure 4-3. Speed Filter - Woodward 723PLUS Technical Manual

723PLUS Digital Marine Control Manual 26482

Figure 4-3. Speed Filter

11 MANEUVER GAIN (*0.1–500.0)—The maneuver gain is set to provide stable
control of the engine at maneuver speed conditions.
F**DYNAMICS CLUTCHED**
These settings are used only when this engine's clutch is closed.
01 IDLE GAIN 2 (*0.01–500.0)—The gain is set to provide stable control of the
engine at low or idle speed conditions and both clutches are closed.
02 RATED GAIN 2 (*0.01–500.0)—The gain is set to provide stable control of the
engine at rated speed conditions and both clutches are closed.
03 RESET 2 (*0.01–50.0 sec)—Reset compensates for the lag time of the
engine. It adjusts the time required for the control to return the speed to zero
error after a disturbance. Reset is adjusted to prevent slow hunting and to
minimize speed overshoot after a load disturbance.
04 ACT COMP 2 (*0.01–1.0 sec)—Set this value for the time constant of the
actuator and fuel system. Typical values are at 20–25% of the reset.
05 GAIN RATIO 2 (*1.0–20.0)—Set this value to the desired gain ratio multiplier
when the speed error is outside of the window width.
06 WINDOW WIDTH 2 (*0.01–150.0 rpm)—Set this value for the desired speed
error window (±) width.
07 GAIN SLOPE 2 (*0.01–20.0)—Set this value for the desired gain slope
beyond the gain break point.
08 GAIN BKPT 2 (*0.01–100.0%)—Set this value for the desired percent actuator
output above which Gain Slope becomes effective.
09 SPEED FILTER 2 HZ (*0.5–20.0 Hz)—Set this value to the cutoff frequency
found by using the formula in Chapter 3. This is the roll-off frequency for the firing
torsional filter. This filter is active when dynamics 2 is selected.
56 Woodward