SuperFlow AutoDyn, Руководство оператора

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Control Modes
11-10 AutoDyn Chassis Dynamometer Operator Manual
Example 6:
A SuperFlow water brake controlling to engine torque (with actuator phase = 1):
If the controller phase is 1 and measured engine torque increases, the controller output will
increase, and the load will increase, allowing the torque to increase even more.
If the
controller phase is 0 and measured engine torque increases, the controller output will
decrease, and the load will decrease, maintaining the desired torque.
In this application, the controller phase should be 0 .
11.5.3 Open and Close Rate
Allowed Values:
0–7
These parameters apply a filter to the control system output signal to the control mechanism.
Suggested values: 0 (they are not generally used on anything except diesel engine dynos)
What it Does
The Open and Close Rate parameters provide the capability to control the valve open-versus-
close rate to compensate for a controller that acts differently while opening versus closing
(unloading versus loading). Because nearly all SuperFlow systems have these parameters set
to zero, this feature is not currently used.
11.5.4 P-Gain
P
term
= (Error * P
gain_value
*Phase) where Phase = ±1
Allowed values:
Any floating point value
Suggested Value Range
• 0.4 to 2 for engine dynos controlling to engine speed
• 350 to 450 for CycleDyn controlling to vehicle speed
• 500 to 600 for AutoDyn controlling to vehicle speed
What it Does
Proportional Gain determines how rapidly error influences the control to the dyno or to the
throttle. The P-Gain is proportional to the difference between the desired set point valve and
the actual current value. Its effect is greatest when the actual reading is far away from the set
Table 11-3.
Controller Phase
Control Device Actuator Phase Control Channel
Controller
Phase
Throttle 0 Engine Speed 0
0 Engine Torque 0
Eddy Current 0 Engine or Roll Speed 1
0 Engine or Roll Torque 0
Servo Valve 1 Engine Speed 1
1 Engine Torque 0