The DANIELA project is supported by the European Commission within the frame of the 7th Framework Programme (FP7).
The aim of the DANIELA (Demonstration of ANemometry InstrumEnt based on LAser) project is to prepare the operational use of a flush mounted ADS (Air Data System) built around a 3 axis Doppler LIDAR function as a primary air data channel on civil aircraft, and to assess optical concepts for the measurement of temperature and density to complete the ADS, in a second step.
A current typical air data system is composed of probes and pressure sensors. It delivers vital parameters for the safety of the aircraft’s flight such as air speed, angle of attack and altitude.Even if such system has proved to provide sufficient accuracy with high level of safety, it suffers from lack of robustness against bird collision, passenger (stairs mishandling) or hailstone. In addition, in order to ensure the system availability, the probes need de-icing, which requires high power consumption (typically 9.000 Watts for the 3 air data channels). Furthermore, the high level of safety requires maintenance as the externally mounted probes are exposed to corrosion.
Damages caused by hailstone on an aircraft nose
The use of laser technology is seen as an appropriate solution to improve safety by the main airframers and, even if it is not able to provide all parameters at an early stage, a partial implementation using three axis velocity is envisaged, enabling to remove the most exposed external probes: AOA/SSA and pitot.
Thus the main issue before implementing the technology in the airplane programmes is to make sure that the system will provide the parameters in all adverse flight conditions.