The Development of Neural Network Based System Identification ...

3.3 THE DEVELOPMENT OF TEST STAND FOR SAFE FLIGHT CONTROL TESTING 63
Heading Direction
Crosswind
Flying attitude is maintained without tail drift
Figure 3.6
The gyro automatically corrects changes in the helicopter tail trim by crosswind.
allows us to connect any two DX7 series transmitter together for the purpose of training
a new pilot. In practice, one of the two transmitters is held by the instructor pilot
(Master Transmitter) and the second transmitter serves as the Trainer Transmitter.
As long as the instructor holds his trainer switch in the ‘ON’ position, the model will
respond to the commands of the trainer transmitter allowing the trainee to fly the
model. The Master Transmitter has full control of the model if the trainer switch on
the instructor’s transmitter is left in its ‘OFF’ position.
3.3 THE DEVELOPMENT OF TEST STAND FOR SAFE
FLIGHT CONTROL TESTING
Controlling a remote control helicopter is difficult and careful experimentation is essential
in building a working UAV helicopter prototype. For the testing of the autopilot system
developed in this research, a six degree of freedom (DOF) test-bed for safe indoor
helicopter flight was developed. It was mainly designed as a safety device for preventing
crashes and out-of-control flight. There are already many test stands for helicopter
control tests available in the literature, but most of these stands are limited to only a
few DOF that cannot be used to simulate free flight of the UAV while on the test stand
[Cetto et al., 2009, Amidi, 1996, Kim and Tilbury, 2004, Vitzilaios and Tsourveloudis,
2009, Vilchis et al., 2003]. Therefore there is a need for a development of a test rig that