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Project reference number: IST-FP6-2002-Aero-1-502793-STREP
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| Date of preparation: |
20 March 2003 |
| Type of instrument: |
Specific Targeted Research Project |
| Thematic Priority: |
4. Aeronautics and Space Priority |
| Call identifier: |
FP6-2002-Aero-1, |
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List of Participants:
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Abbreviated name |
Full name |
Status in the project |
Country |
| 1 |
IFTR
|
Institute of Fundamental
Technological Research, Warsaw |
Research institute
Co-ordinator |
Poland |
| 2 |
EADS
|
EADS Deutschland GmbH,
Military Aircraft, Munich |
Industrial end-user |
Germany |
| 3 |
PZL
|
Polskie Zaklady Lotnicze, Mielec |
Industrial end-user |
Poland |
| 4 |
IA
|
Institute of Aviation, Warsaw |
Research institute |
Poland |
| 5 |
FhG-ISC
|
Fraunhoffer Institute, Wuerzburg |
Research institute |
Germany |
| 6 |
CEDRAT
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CEDRAT Technologies, Grenoble |
SME company |
France |
| 7 |
USFD
|
University of Sheffield, Scheffield |
University |
U.K. |
| 8 |
MD
|
Messier-Dowty |
Industrial end-user |
France |
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| Co-ordinator Name: |
Jan Holnicki-Szulc |
| Co-ordinator organisation: |
Institute of Fundamental Technological Research |
| Co-ordinator e-mail |
holnicki@ippt.gov.pl
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| Co-ordinator tel/fax |
+48 22 828 7493 |
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The ADLAND project deals with evaluating the options for adaptive shock absorbers
to be applied in aircraft landing gears. Based on analytical design
procedures to be developed different potential design options will be simulated.
From a best practice solution determined, the different hardware components
regarding adaptive shock absorbers will then be developed and will then be tested
with regard to an adaptive landing gear model. The objectives of the project are:
- to develop a concept of adaptive shock-absorbers
- to develop new numerical tools for design of adaptive vehicles and for
imulation of the adaptive structural response to impact scenario
- to develop technology for actively controlled shock-absorbers applicable in
landing gears (two options: MR fluid-based and piezo-valve-based will be considered)
- to design, produce and perform repetitive impact tests of the adaptive landing
gear model with high impact energy dissipation effect.
- to design, produce and test in flying the chosen full-scale model of adaptive landing gear.
Typically, shock absorbers are designed as passive devices with characteristics adjusted
to the most frequently expected impact loadings. However, in many cases the variation of
real working conditions is so high, that the optimally designed passive shock absorber does
not perform well enough. Variation of impact conditions affecting landing gears in various
landing conditions is a good example of such a situation. Actively controlled characteristics
of shock absorbers seams to be the desired solution in this case.
In contrast to the passive systems the proposed research focuses on active adaptation of energy
absorbing structural elements where the system of sensors recognises type of impact loading and
activates energy absorbing components in the scenario that guarantees optimal dissipation of impact energy.
The term "active adaptation to impact" refers to the methodology used to formulate laws that
determine the required signal produced in response to the measured output of the sensors
(e.g. radar or accelerometers). This control signal is sent to the actuators (e.g. tuning
characteristics of Magneto Rheological Fluid or driving piezo-valves), thereby applying corrections
of mechanical properties of structural members.
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