We have
developed a landing flap drive control
unit. The modular design makes the drive
unit suitable for other actuation tasks.
The control unit has several features:
operation
on an aviation power supply
according to RTCA DO-160,
connection
for a brush motor (with power-off
brake) and two limit switches,
various
protective features, as:
protection against inrush current
pulse.
The modular design with two
boards simplifies the operation in
different power regimes (with only minor
adaptations in the software). The
featured version operates (according to
RTCA DO-160) at 28 VDC and up to 15 A.
The
adaptation to positioning tasks and
requirements different to the featured
landing flap is greatly simplified by the
modular design. So especially for compact
application with battery supplied
actuation systems in research and
development (as vehicles, mobile robotics)
there are several exchangeable variants
with common interface.
Test unit:
The first evaluation uses a test unit
with more displays and configuration
switches compared to the final unit. The
additional means for adjustment and
feedback simplify the setup and design
review considerably.
Schematic wiring diagram:
The schematic wiring diagram shows the
connection of the control unit with the
pilot interface (with switches, buttons
and LEDs) and the aircraft installation (motor,
brake, limit switches).
General board layout:
The control unit consists of two boards:
the large power board and on top the
micro-controller board.
Individual boards:
The power board has the power stages to
drive the motor and the power-off brake
and various protective measures for the
operation according RTCA DO-160.
On the micro-controller board
are the connectors for the pilot
interface and also various protective
measures.
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