SuperFlow AutoDyn, Руководство оператора

Страница: 144 / 208

AutoDyn
Operators Manual
Section 9 - Page 24
CH9 AutoDyn Description of the Config File.fm
Channel 108 - InrPwr
2WD Systems
HP = (2200+C91)*C122*C10/375
kW = ((2200*0.454)+C91)*9.81*C122*C10/3600
AD-11
Systems
HP = (800+C91)*C122*C10/375
kW = ((800*0.454)+C91)*9.91*C122*C10/3600
Channel 108 is used to calculate the inertia power during a transient test.
When the vehicle is accelerating or decelerating, additional power is
developed by the engine to accelerate the inertia of the roll, the absorber,
and the rotating components of the vehicle. Inertia power is calculated
from the base inertia of the dynamometer, the rotating inertia of the
vehicle (defaulted to a value of 0 in channel 91, but may be changed if
desired), the rate of acceleration in G's from Channel 122, and the actual
road speed from Channel 10. The inertia power is used by Channel 100
to determine the total wheel power. The default value of 2200 (800 for
AD
-
11
) is the inertia value for a typical rear rollset. Individual customer
systems will require their specific rollset value to be entered into this
channel. This will be done during initial testing at SuperFlow and can be
verified by the customer calibration data sheet shipped with the system.
The value is equivalent vehicle mass in pounds. This value should match
the calibration sheet shipped with your system. DO NOT CHANGE THIS
VALUE. Doing so will severely alter all power readings from the system.
The constant 375 comes from the standard horsepower equation
constant that uses 33,000 lbs-ft/min. By dividing 33,000 by 5280 and then
multiplying by 60, you get 375. This converts to lbs-miles/hour, which
works with the MPH value from channel 10.
AWD Systems (C39*C88) + (C43*C89)
On AWD systems, channel 108 calculates total inertia power by adding
together the front rollset inertia power, channel 39, and the rear rollset
inertia power, channel 43. Channels 88 and 89 are used as switches for
selecting the wheel power measurement mode on the AWD system. This
value is combined with channels 126 and 105 in channel 100 to calculate
wheel power.
Channel 109 - DstncF C225*5280
Channel 109 calculates distance traveled in feet. Memory channel 5
(C225) is a system channel that continually calculates distance in miles.
This channel is used in the Road Load simulation test. It may also be
used in any other test profile by simply adding a command to preset
Memory 5 to zero prior to starting the test. All current test profiles reset
memory channel 5 at the beginning of each test.
Channel 110 - DstncM C225
Channel 110 calculates distance traveled in miles. Memory channel 5
(C225) is a system channel that continually calculates distance in miles.
However, the decimal units displayed on channel 225 is in whole units
and cannot be changed. Channel 110 allows the reading to be viewed in
tenths of a mile. This channel is used in the Road Load simulation test. It
may also be used in any other test profile by simply adding a command to
preset Memory 5 to zero prior to starting the test. All current test profiles
reset memory channel 5 at the beginning of each test.