SuperFlow AutoDyn, Руководство оператора

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AutoDyn
Operators Manual
Section 9 - Page 34
CH9 AutoDyn Description of the Config File.fm
Channel 211 - Timer 2
Channel 211 is a system timer channel. This channel is typically used in
test profiles to indicate ramp time or the time during which the data is
collected during a test. It uses tenths precision.
Channel 220 - Memory 0
Channel 220 is acceleration in mph/second. It is used by Channel 122 to
calculate acceleration in G's.
Channel 225 - Memory 5
Channel 225 is distance traveled in miles since the last reset of the
counter.
Channel 229 - Memory 9
Channel 229 is used by the automated tests to trigger the starting and
stopping of the real-time graphs in WinDyn. Do not use this channel for
other purposes or this triggering function will be lost.
Channel 231 - LineNo
Channel 231 is a system channel which simply indicates the line number
of the data line recorded in a test data file (.sfd).
9.3 Control Channels
Control channels are data channels that can function as closed loop feedback channels. Closed
loop feedback channels allow WinDyn to servo (adjust) a control device, such as control on a
dynamometer or a throttle actuator to produce a desired value, such as 100 lb-ft of torque or 4000
rpm. The control system uses the control channel to "see" the current value, for example the
current torque value, and compares the current value to the desired value. The control system
continues to servo the controller (up or down depending on whether the current value is higher or
lower than the desired value) until the current value (the value of the control channel) matches
desired value. This process of "read current value", "compare to desired value" and "adjust"
continues until the control system is placed in manual mode.
Five control channels are available for use by up to two controlled devices, such as dynamometer
load and throttle controllers. This allows five different controlled values to be defined for closed
loop control. In other words, one or both controllers could be used to execute closed loop control of
up to two of five possible values. The combination of a controller controlling a specific value is
called a mode. Up to ten different control modes can be used by combining the five control
channel values with the two available controllers.
It is not necessary to define all five channels. At a minimum, one channel must be defined if closed
loop control is required. Many testing applications use two control channels, one for torque and
one for speed. This allows tests to be conducted that control closed loop speed or closed loop
torque. The SuperFlow AutoDyn chassis dynamometers uses only one controller (load) but two
control channels, roll speed (Channel 10) and roll torque (Channel 129). Testing requirements vary
considerably in terms of control requirements.