A concept of a new energy management system synthesizing meteorological and orographic influences on airplane safety envelope was developed implemented at the ZHAW Centre for Aviation. corresponding flight simulation environment built in Research Didactics Simulator (ReDSim) to test first implementation cockpit display system. series pilot-in-the-loop simulations were carried out with group pil...

In this paper, we propose an autonomous precision landing method for an unmanned helicopter based on an on-board visual navigation system consisting of a single pan-tilting camera, off-the-shelf computer hardware and inertial sensors. Compared to existing methods, the system doesn’t depend on additional sensors (in particular not on GPS), offers a wide envelope of starting points for the autono...

Mass spectrometry data from high-resolution time-of-flight instruments often contain a vast number of noninformative background-ion peaks whose signal is similar to that of peptide peaks. Consequently, seeking peptide signal in these spectra based on a signal-to-noise ratio will remove signal peaks as well as noise. This work characterizes the background as a precursor to seeking peptide-relate...

Air-breathing electric propulsion (ABEP) enables long duration missions at very low orbital altitudes through the use of drag compensation. A system-level spacecraft model is developed, using interaction between thruster, intake and solar arrays, coupled to a calculation drag. quadratic solution found for specific impulse evaluated identify thruster performance required drag-compensation varyin...

Militarized versions of commercial platforms are growing in popularity due to many logistical benefits in the form of commercial off-the-shelf (COTS) parts, established production methods, and commonality for different certifications. Commercial data and best practices are often leveraged to reduce procurement and engineering development costs. While the developmental and cost reduction benefit...

This paper studies the dynamic modeling method of fold-able multi-body aircraft based on dynamics theory system. Considering as a complete multi-rigid body system, model for free unfolding process after horizontal launch is established. On basis model, coil spring moment and damping flexible connection between flight units are added. Taking certain type three-section wing an example, numerical ...

Abstrac t This paper presents a method for locating and measuring the size of cracks in beams by time of flight (ToF) of ultrasonic wave. The echo detected was processed using the stationary wavelet transform and the Hilbert transform. The accuracy of the information obtained from the processed signal depends on the selected mother wavelet. To select the best mother wavelet for signal processin...

A gain-scheduling approach for uncertain Linear Parameter-Varying (LPV) systems with fixed linear fractional relationships on a parameter set is developed. The approach combines LPV theory based on Linear Matrix Inequalities (LMIs) and μ-synthesis to form a new robust approach for large envelope control design. The new approach is used to design an automatically gain-scheduled pitch-rate contro...

Modern high-performance combat aircraft exceed conventional flight-envelope limits on maneuverability through the use of thrust vectoring, and so achieve supermaneuverability. With ongoing development biomimetic unmanned aerial vehicles (UAVs), potential for supermaneuverability mechanisms becomes apparent. So far, this has not been well studied: UAVs have yet shown to be capable any forms clas...

Airships are necessarily exposed to the atmospheric electrical environment, which includes electric fields, electrostatic charges, and lightning. Protection from hazards presented by these environments is necessary. One of the main issues is protection of the envelope, which is usually filled with helium. Helium poses special problems in this regard, even though it is an inert gas, because elec...