Kodo Ito is an engineer with Mitsubishi Heavy Industries, LTD and is a visiting researcher staff with Kinjo Gakuin University. He received the BS and the MS degrees (Physics) from Yamagata University in 1983 and 1985, and the DR degree from Aichi Institute of Technology in 1999. His research interests include the optimal operation and maintenance policies of large and complicated systems such a...

From Wright Brothers 1903 to present day 2003, aeronautical technology has made a profound progress. This paper demonstrates the outcome of this progress in weight, wing area, and engine thrust in three categories of transport aircraft of short to long range, regional jets, and turbo-prop commuter aircraft. Also the paper includes those aircraft with distinct jump in aeronautical technology. Fe...

A detailed understanding of the climate and air quality impacts of aviation requires measurements of the emissions of intermediate-volatility and semi-volatile organic compounds (I/SVOCs) from aircraft. Currently both the amount and chemical composition of aircraft I/SVOC emissions remain poorly characterized. Here we characterize I/SVOC emissions from aircraft, using a novel instrument for the...

In the context of aircraft noise simulations, an accurate representation sources is crucial so that reliable predictions can be obtained. this contribution, we present a comparative study between provided by emission models based on DLR in-house code PANAM and sonAIR simulation software. Both are semi-empirical descriptions engine airframe contributions, meaning levels modeled separately for ea...

Landing impact and runway unevenness have proximate consequence on performance of landing gear system and conduce to discomfort of passengers and reduction of the pilot’s capability to control aircraft. Finally, vibrations caused by them result in structure fatigue. Fuzzy logic controller is used frequently in different applications because of simplicity in design and implementation. In the pre...

This paper deals with the study and comparison of passive and active landing gear system of  the aircraft and dynamic responses due to runway irregularities while the aircraft is taxying. The dynamic load and vibration caused by the unevenness of runway will result in airframe fatigue, discomfort of passengers and the reduction of the pilot’s ability to control the aircraft. One of the objectiv...

We present a novel approach to the automatic verification of LTL requirements of non-linear discrete-time hybrid systems. The verification tool uses an interval-based constraint solver for non-linear robust constraints to compute incrementally refined abstractions. Although the problem is undecidable, we prove termination of abstraction refinement based verification of such properties for the c...

SUMMARY This Report describes a theoretical investigation of the noise generated when turbulence interacts with a slot between a wing and flap. The slot is modelled by the region between two overlapping, semi-infinite rigid planes representing the wing and flap, and sound is produced when turbulence convects above, below or through the slot. The analysis determines the dependence of the radiate...