Section 1 Overview
2nd Ed Aug 2019
S-TEC 3100 Digital and Analog
1-4
Half Bank (HB) Mode
: Reduces commands in HDG and GPS/FMS steering
by half (if installed)
Automatic Trim Mode
: Automatically drives pitch trim servo.
1.6.
SYSTEM COMPONENTS
1.6.1.
S-TEC 3100 Flight Guidance Computer (FGC)
The S-TEC 3100 FGC is the main processing unit for the autopilot system.
It controls all of the input/output processing, control law calculation, and
drives up to four servos (pitch, roll, yaw and pitch trim).
Figure 1-2:
S-TEC 3100 Flight Guidance Computer (FGC)
The FGC requires navigational and target data to provide the correct servo
drive signals. Mode selection may be controlled through the front panel.
The S-TEC 3100 has an on-board MEMS device that calculates attitude
angles and rates in the pitch, roll, and yaw axis. This may be configured
to act as the primary or single source of attitude on certain interface
configurations.
NOTE:
Each S-TEC 3100 is loaded with a single configuration file, which
contains aircraft and interface configuration data to match the
installation. Any future avionic upgrades on equipment interfaced to the
autopilot may require a new configuration file to be uploaded.
1.6.2.
Aircraft Configuration
The aircraft configuration contains specific gains and servo drive values
to match the aircraft flight characteristics. Gain values are specifically
setup during STC flight testing and are calculated for the optimum flight
performance of each aircraft model/type.
