Background: Many elderly individuals complain of difficulty in understanding speech in noise despite having normal hearing thresholds. According to previous studies, auditory training leads to improvement in speech-in-noise perception, but these studies did not consider the etiology, so their results cannot be generalized. The present study aimed at investigating the effectiveness of envelope-b...

In this paper a two-phase supply modulator suitable for envelope tracking power amplifier is presented. The designed supply modulator has the linear assisted switching architecture. Two-phase architecture is used in order to reduce the output switching ripples. The proposed architecture uses hysteretic control instead of pulse width modulation (PWM) which significantly reduces the circuit compl...

This article presents the application of aeroelastic tailoring in design wings for a flying demonstrator, as well validation methodology with flight test results. The investigations were performed FLEXOP project (Flutter Free Flight Envelope Expansion Economical Performance Improvement), funded under Horizon 2020 framework. aimed at methods and tools active flutter control, demonstration potent...

In this paper, an approximate solution of sensitivity matrix of required velocity with final velocity constraint is derived using a piecewise linear gravity assumption. The total flight time is also fixed for the problem. Simulation results show the accuracy of the method. Increasing the midway points for linearization, increases the accuracy of the solution, which this, in turn, depends on the...

A method is presented for the stress analysis of flight vehicles under different flight conditions including gust and control surface deflection (or maneuver) using the governing equations of rigid-body motions and elastic deformations. The Lagrangian approach is used to derive the governing equations of motions. For this purpose, the basic equations of motions are derived in terms of potential...

Aim To analyse the effects of nine species trait variables on the accuracy of bioclimatic envelope models built for 98 butterfly species. Location Finland, northern Europe. Methods Data from a national butterfly atlas monitoring scheme (NAFI) collected from 1991–2003 with a resolution of 10 × 10 km were used in the analyses. Generalized additive models (GAMs) were constructed for 98 butterfly s...

against the range-dependent accuracy of the tracking radar measurements including range, elevation and bearing angles, a new hybrid adaptive kalman filter is proposed to enhance the performance of the radar aided strapdown inertial navigation system (ins/radar). this filter involves the concept of residual-based adaptive estimation and adaptive fading kalman filter and tunes dynamically the fil...

Synthesis of a flight control system for such an aircraft that achieves stable and acceptable performance across specified flying envelope in the presence uncertainties represents attractive challenging design problem. This study uses genetic self-tuning PID algorithm to develop intelligent aerosonde UAV model. To improve system's transient responses, gains controller are improved using (GA). S...

A sparse recurrent fuzzy neural network (SRFNN)-based dynamic flight envelope protection (FEP) method is proposed and integrated into an aircraft control system against possible failures. As a baseline of the system, fault-tolerant controller used to compensate uncertainties caused by failures, such as damaged wing. augmentation, SRFNN-based FEP employed prevent from breaking through safe bound...

This overview paper covers the flight control system of Bertin Technologies’ Hovereye ® mini vertical takeoff and landing (VTOL) UAV, including development, verification in simulation and flight test results. Hovereye ® is a demonstrator of a short range reconnaissance platform in support of army units engaged in urban combat, such as in peace-keeping missions, with an electro-optic day or nigh...