CONDITION REPORT FOR OUTDOOR AND INDOOR STORAGE Deliverable D6.1

This deliverable reports on the work carried out in Task 6.1 of WP6 (Storage conditions), which concerns conditions of selected representative sites (museum building, storage hangar open or closed, possibly roofed) where WWII aircrafts/wrecks are stored/exhibited and especially made of aluminium alloys

PROTOCOL OF PRELIMINARY ACTIONS FOR AIRCRAFT PROTECTION - Deliverable D6.2

This deliverable reports on the work carried out in Task 6.2 of WP6 (actions for preventive protection - subtask to Task 6.2), which concerns preliminary actions for preventive protection, namely measurement devices and data loggers installation, in selected representative sites (museum building, storage hangar open or closed, possibly roofed)

SIMULATION OF PREVENTIVE CONSERVATION IN A MUSEUM BUILDING - Deliverable D6.3

This deliverable reports on the work carried out in Task 6.3 of WP6 (Simulation of preventive conservation in a museum building), which concerns microclimate control, simulated for a hangar selected in D6.1, designed for preventive conservation of aeronautical heritage made of aluminium alloys, in particular

Rizeni systemu se zpozdenim v klouzavych rezimech s vyuzitim anizochronni stavove zpetne vazby.

Sliding mode control (SMC) dependent on a state feedback is applied to time delay (TD) system control. Since controlled TD system is described by an anisochronic state model the state feedback is called as anisochronic. Then a sliding mode provides perturbations compensation, while the anisochronic state feedback performs TD compensation. However, the SMC itself is insensitive to unmatched perturbations in steady state of control loop response. Both TD compensation and perturbations compensation are reached at all if Smith predictor is included into control loop. Chattering known as parasitic oscillations of control variable encountered in sliding mode control is suppressed by a second-order sliding mode control design. Also the second-order SMC allows stopping the wind-up effect. Moreover, the drawbacks of the second-order version of SMC are as follow: to be computed the first derivatives of state variables and low stability margin of multistep numerical method applied to precise solving control variable computation. Therefore the anisochronic state model is suitable for the second-order version of SMC design, by which the first derivatives of state variables are computed. Also due to expected dominant TD in the model there is usually no fear of the low stability margin of numerical method for solving the SMC. The identification of the dominant TD of the anisochronic state model allows to consider the model as quasi-stationary or as a model with so-called weak dynamics, which can be usually omitted by a steady-state model assessment. Finally, the SMC of quasi-stationary process is applied to microclimate control in historical buildings.Available from STL Prague, CZ / NTK - National Technical LibrarySIGLECZCzech Republi

First step in the PROCRAFT Project on WWII Aircraft Heritage: Investigation and Conservation of the Aluminium Alloys

International audienceThe conservation of excavated wrecks or abandoned aircraft is of cultural and historical interest. A first step in understanding the challenges posed by this type of cultural heritage and in finding solutions for its conservation is to document the constituent materials and their subsequent alterations. In the project PROCRAFT, aircraft wrecks from six nations involved in WWII were collected and then studied. Analysis of the elemental composition together with archival research allowed identification of the wrought aluminium alloys used in the non-structural and structural parts of the aircraft. Three manufacturing processes were recognised: rolling, extrusion and forging. The corrosion protection treatments applied during manufacturing of the aircraft parts were also examined, which revealed cladding with a thin aluminium foil, anodisation or the application of primer/paint. Based on typical examples of the alterations that occurred in the metal components, we demonstrate the importance of this original protection against the aggressiveness of the environment

First step in the PROCRAFT Project on WWII Aircraft Heritage: Investigation and Conservation of the Aluminium Alloys

International audienceThe conservation of excavated wrecks or abandoned aircraft is of cultural and historical interest. A first step in understanding the challenges posed by this type of cultural heritage and in finding solutions for its conservation is to document the constituent materials and their subsequent alterations. In the project PROCRAFT, aircraft wrecks from six nations involved in WWII were collected and then studied. Analysis of the elemental composition together with archival research allowed identification of the wrought aluminium alloys used in the non-structural and structural parts of the aircraft. Three manufacturing processes were recognised: rolling, extrusion and forging. The corrosion protection treatments applied during manufacturing of the aircraft parts were also examined, which revealed cladding with a thin aluminium foil, anodisation or the application of primer/paint. Based on typical examples of the alterations that occurred in the metal components, we demonstrate the importance of this original protection against the aggressiveness of the environment

First step in the PROCRAFT Project on WWII Aircraft Heritage: Investigation and Conservation of the Aluminium Alloys

International audienceThe conservation of excavated wrecks or abandoned aircraft is of cultural and historical interest. A first step in understanding the challenges posed by this type of cultural heritage and in finding solutions for its conservation is to document the constituent materials and their subsequent alterations. In the project PROCRAFT, aircraft wrecks from six nations involved in WWII were collected and then studied. Analysis of the elemental composition together with archival research allowed identification of the wrought aluminium alloys used in the non-structural and structural parts of the aircraft. Three manufacturing processes were recognised: rolling, extrusion and forging. The corrosion protection treatments applied during manufacturing of the aircraft parts were also examined, which revealed cladding with a thin aluminium foil, anodisation or the application of primer/paint. Based on typical examples of the alterations that occurred in the metal components, we demonstrate the importance of this original protection against the aggressiveness of the environment

First step in the PROCRAFT Project on WWII Aircraft Heritage: Investigation and Conservation of the Aluminium Alloys

International audienceThe conservation of excavated wrecks or abandoned aircraft is of cultural and historical interest. A first step in understanding the challenges posed by this type of cultural heritage and in finding solutions for its conservation is to document the constituent materials and their subsequent alterations. In the project PROCRAFT, aircraft wrecks from six nations involved in WWII were collected and then studied. Analysis of the elemental composition together with archival research allowed identification of the wrought aluminium alloys used in the non-structural and structural parts of the aircraft. Three manufacturing processes were recognised: rolling, extrusion and forging. The corrosion protection treatments applied during manufacturing of the aircraft parts were also examined, which revealed cladding with a thin aluminium foil, anodisation or the application of primer/paint. Based on typical examples of the alterations that occurred in the metal components, we demonstrate the importance of this original protection against the aggressiveness of the environment