Example: LAPAZ - actuator electronics for
flight control (with Stemme AG)
Rosner-TDL has developed the
actuator electronics for an Automatic Flight
Control System (AFCS). The flight tests during
summer 2010 were very successful.
LAPAZ: Stemme S15 with Automatic Flight Control
System
An example for our contribution
to technology demonstrators is the actuator
electronics, which Rosner-TDL has developed for
STEMME AG (Strausberg, Germany). The project
LAPAZ (acronym for "Luft-Arbeits-Plattform für
die Allgemeine Zivilluftfahrt" or "airborne
exploration platform for the General Aviation")
is a three year term technology project,
supported by the German Federal Ministry for
Economy and Technology within the framework of
the forth national aviation research program.
Other project partners are the Institute of
Airborne Systems (ILS, University of Stuttgart)
and the Institute of Aviation and Aerospace (ILR,
Technical University of Berlin).
With the successful flight
tests in summer 2010 STEMME has demonstrated the
integration of the Automatic Flight Control
System (AFCS). So the aircraft can be flown
manually by the pilot or autonomously by the
flight control system. This enables tasks as
geoexploration or surveillance without pilot
which expands the scope of operation considerably.
There are ten actuators in the
aircraft, each with full 100 percent control
authority. This is considerably more than in
typical autopilot systems. Accordingly the
actuators and the electronics have to be more
powerful. The design of the electronics is based
on RTCA DO-160. There are additional requirements
(e.g. reaction on gusts) which are vital for safe
autonomous operation.
Each actuator electronic system
consists of two independent units: the servo
electronic unit to drive and control the actuator
(motor, clutch) from the flight control (by CAN
bus) und the additional resolver electronic unit
for the independent supervision of the output
position. By the separation failures in the
actuators can be detected, so the supervising
flight control system can react accordingly.
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