The Aerospace Laboratory of IST is equipped with an Aero-Acustic Wind Tunnel (TAA). This tunnel is a closed circuit, U-shaped wind tunnel with an open test section. A 200kW and 1500rpm electric motor powers a 7 blade fan that allows low turbulence airflow velocities up to 50m/s. The wind tunnel has a 1.6m diameter exit nozzle. For acoustic testing the test section is within an anechoic chamber where the walls are covered with wedges made of foam with a cut off frequency of 80Hz.
The installation of the Aero-Acoustic Wind Tunnel was financed by FCT through "Programa Nacional de Re-equipamento Científico" (Project REEQ/328/EME/2005).
|Blueprint of the aero acoustic Lab with Tunnel||Photo of tunnel test section before construction |
of anechoic chamber
|Tunnel after construction of anechoic chamber
The Flight Testing Laboratory is located in the Pavilion Mechanics III, and is assigned to the Flight Tests Work Group (Grupo de Trabalho de Ensaios em Voo - GTEV), which resulted from cooperation between the Instituto Superior Técnico (Lisbon Tech) and the Portuguese Air Force. The aim was to give Portugal autonomous capability for the realization of flight tests. Several organizations have supported the creation of this capability, namely:
- RTO/AGARD - Research and Technology Organization;
- NLR - Dutch National Aerospace Laboratory – The Netherlands;
- DLR - German Aerospace Establishment – Germany;
- Braunschweig Technical University – Germany;
- United States Air Force Flight Test Center – United States of America;
- Portuguese Government - funding JNICT/FCT and PIDDAC.
This is a support laboratory, indirectly related to the realization of flight tests, allowing the design, development, implementation, testing and calibration of instrumentation systems components. Processing and analysis of collected data are also conducted in this laboratory. To date, the research and development projects completed or in progress have involved the following aircrafts, mainly owned by the Portuguese Air Force:
- CASA C- 212-200 AVIOCAR - Basic Aircraft for Flight Research (BAFR);
- AEROSPATIALE SA-330 PUMA;
- VOUGHT A-7P CORSAIR II - two instrumented aircrafts;
- LOCKHEED P-3P ORION - two instrumented aircrafts;
- DORNIER/DASSAULT ALPHA-JET - two instrumented aircrafts;
- LOCKHEED C-130H HERCULES;
- AEROSPATIALE SOCATA EPSILON TB-30 - two instrumented aircrafts;
- DASSAULT FALCON 20;
- DASSAULT FALCON 50;
- DASSAULT FALCON 900B
This lab is also used in the context of educational activities under the Master in Aerospace Engineering.
In Instituto Superior Técnico (Lisbon Tech) a Research Flight Simulator (Simulador de Voo de Investigação - SVI) is being developed and implemented. Main objectives are: supporting of aeronautical research projects; supporting of undergraduate and graduate education activities.
The Research Flight Simulator (SVI) has a modular and flexible architecture, consisting essentially of the following modules.
- Dynamics module. This module is the simulator core module, since he simulates the dynamics of the aircraft, due to atmospheric parameters, inputs applied by the pilot and according to the model of the aircraft. He allows the determination of the aircraft position, its derivatives and corresponding attitude.
- Suggestion of movement module. This module consists of a motion platform MOOG 6DOF2000E, with six degrees of freedom and fully electric, a program developed in MatLab, which receives data from the aircraft dynamics (dynamics module) and produces a movement that will suggest the user the perception of the “real movement”.
- Pilot interface module. This is the module through which the pilot gives commands to the simulator (joystick. ..) and receives information (indicators...). This module is adjustable for each simulated aircraft and could be improved.
- Image and sound simulation module. This module could be improved/adjusted.
Currently the Research Flight Simulator (SVI) relies primarily on the use of the following components:
- Platform motion, MOOG 6DOF2000E, with 6 degrees of freedom and fully electric;
- Five networked personal computers, one of which controls the motion platform.
- Part of a FOKKER F-27 FRIENDSHIP cabinet (other alternatives may be interesting ...);
- Control systems and indicators;
- Several components allowing the implementation, evaluation and development of the simulation imaging and sound systems;
- Programs implemented, developed and used, basically based on MatLab, X-Plane and FlightGear.
The operation of the Research Flight Simulator (SVI) occurs in two spaces: one in which the simulator is installed and operates; a second space where the control of the operation of the simulator occurs. As mentioned, the modular and flexible structure, based on the use of software modules, allows the adjustment of the simulator for different applications.