Lab VIEW and PID Action-Based Brake Lever Effect for Validation …
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U (s) = K p
1 +
1
T I s
+ T D s
E(s)
(1)
where
U(s) Control signal
K p
Proportional gain
T I
Integral time
T D Derivative time and
E(s) Error signal.
Parameters K p , T I and T D were found in Ziegler Nichol’s approach by means of
tests in the built Lab VIEW-based simulation model for various speed conditions and
is indicated in Table 1.
Lab VIEW is utilized to get inputs and also for the plot validation on Lab VIEW
screens. The front and rear panels are available in Lab VIEW and in Fig. 1 servo
performance which is in front panel is represented. It is with buttons such as sensor
calibration, auto cycle, setting menu, and parameter entry is designed separately for
enabling. These parameter is edited in the rear panel based on loops and clusters and
plot is exposed as soon as “run” button is enabled in the front panel. Setting Menu,
Sensor Calibration, Auto Cycle, Parameter Entry, Help, and Exit application are in
front panel. Usual platform in the Lab VIEW front panel will be back by enabling
Table 1 PID parameters
Control loop
PID parameters
KP
KI
KD
Speed control
2
1.2
0.9
Fig. 1 Front panel—performance of the vacuum booster