Last edited by Arara
Saturday, July 11, 2020 | History

2 edition of Active control systems for load alleviation, flutter suppression and ride control. found in the catalog.

Active control systems for load alleviation, flutter suppression and ride control.

North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel.

Active control systems for load alleviation, flutter suppression and ride control.

by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel.

  • 165 Want to read
  • 4 Currently reading

Published by North Atlantic Treaty Organization, Advisory Group for Aerospace Research and Development in [Neuilly-sur-Seine, France] .
Written in English

    Subjects:
  • Airplanes -- Control systems.,
  • Flutter (Aerodynamics),
  • Aeroelasticity.

  • Edition Notes

    SeriesAGARDograph -- no. 175
    The Physical Object
    Paginationv,76p. :
    Number of Pages76
    ID Numbers
    Open LibraryOL19354330M

      Ozbay, H. Active control of a thin airfoil: flutter suppression and gust alleviation, IFAC Proceedings Volumes, , 26, pp – Aouf, N., Boulet, B. and Botez, R. H/sub 2/and H/sub/spl infin//-optimal gust load alleviation for a flexible aircraft, American Control Conference,   Active control technology - Volume 81 Issue - A. Simpson, H. P. Y. Hitch

    USA US06/, USA USA US A US A US A US A US A US A US A US A US A Authority US United States Prior art keywords wing bending moment load threshold level means Prior art date Legal status (The legal status is an assumption and is not a legal ://   The branch has a rich history of aeroelastic experimentation, analyses, and computational accomplishments. Achievements include flutter suppression and gust load and buffet alleviation developments, active flexible/aeroelastic wing development, contributing to flight flutter clearance, and launch vehicle dynamics ://

      technologies for active flutter suppression and gust-load alleviation. Research in these areas is being conducted at NASA's Armstrong Flight Research Center with the XA Multi-Utility Technology Testbed, a small, remotely piloted experimen-tal aircraft developed by Lockheed Martin Skunk Works for the Air Force Research Laboratory (AFRL). And active control technology was assessed for flutter suppression, ride quality improvement, and gust load alleviation to overcome any potential adverse aeroelastic stability or response problems due to aerodynamic heating. A generic hypersonic aircraft configuration was selected which incorporates wing flaps, ailerons, and all moveable fins


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Active control systems for load alleviation, flutter suppression and ride control by North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Structures and Materials Panel. Download PDF EPUB FB2

Active control systems for load alleviation control systems for load alleviation, flutter suppression and ride control. [Neuilly-sur-Seine, France] North Atlantic Treaty Organization, Advisory Group for Aerospace Research and Development, [] Active control systems for load alleviation, flutter suppression and ride control / Authors: North Atlantic Treaty Organization.

-- Advisory Group for Aerospace Research and Development Series: AGARDograph .?biblionumber=   • Gust alleviation systems are already certified on passenger airplanes as well as ride comfort augmentation and maneuver load control systems.

• Those aeroservoelastic systems operate in harmony with the aircraft flight control system (FCS). • Active Flutter Suppression has been thoroughly researched since the mid s (when flight control Active flutter suppression and gust alleviation controller was designed for a delta wing model with two trailing edge control surfaces, by using linear quadratic Gaussian (LQG)/robust control theory.

Due to considering the minimum singular value of the system return difference matrix as constraint, blindness in traditional design method is The active control of nonlinear aeroelastic instability, such as active flutter suppression, is becoming a promising and attractive technology, because it can simultaneously reduce the weight and The RMS value of the gust response for the flexible modes and the control performance index are used as a metric to compare the control performance for gust load alleviation.

Using the initial and optimized wing configurations, GLA system is designed. The control performance index and the   An active control surface modal (ACSM) device for aircraft buffet and gust load alleviation, and flutter suppression, embodied by this invention is different from all of the devices reviewed above.

Furthermore, this system can easily be implemented in existing as well as in new aircraft without significant alterations in the   for augmented rigid body stability, maneuver load control, ride control, fatigue reduction, gust alleviation and flutter suppression.

The DAST program is still in progress and will continue for several years. The benefits of the aeroelastic control systems are increased aircraft   Aircraft Active Flutter Suppression: State of the Art and Technology Maturation Needs. Eli Livne; (or maneuver load control), gust load alleviation, flight control systems for desired and safe handling qualities, and active ride comfort systems.

What is common in all these cases, regarding safety, is that, in addition to the strict   Various active control systems have been accepted, certified, and used for years on commercial and military aircraft.

Those include maneuver load alleviation (or maneuver load control), gust load alleviation, flight control systems for desired and safe handling qualities, and active ride comfort systems. What is common in all An active control surface modal (ACSM) device for aircraft buffet and gust load alleviation, and flutter suppression, embodied by this invention is different from all of the devices reviewed above.

Furthermore, this system can easily be implemented in existing as well as in Experimental Model-Based Aeroelastic Control for Flutter Suppression and Gust-Load Alleviation Article in Journal of Guidance Control and Dynamics 35(5) September with 7 Reads The benefits and disadvantages of various active control systems for transport and fighter aircraft are discussed.

The problem of adverse structural coupling is addressed and possible solutions are outlined. Active Control Technology, gust load alleviation, flutter suppression, ride comfort. Veranstaltungstitel: Flight Mechanics Panel AGARD   The last two tests employed active control laws for Flutter Suppression (FS), Gust Load Alleviation (GLA), and Ride Quality Enhancement (RQE).

Two objectives of the first two wind-tunnel tests were to understand the wind-tunnel model and to develop state-space representations of the wind-tunnel model for use in subsequent control law   The utilization of active control systems for gust alleviation, load redistribution, flight control, and ride comfort improvements has matured over the last two decades to levels of reliability and safety that allow implementation and certification on both military and civil aircraft.

Active Flutter Suppression (AFS) – the reliance on active of an Active Flutter. load, some weight (F-8) had to be restored to meet flutter and fatigue requirements.

Active gust-load alleviation added to the maneuver-load control greatly red uces the weight that has to be restored for fatigue (F-9). Adding active-flutter suppression would yield   For example, gust load alleviation using active control laws on commercial transports has only been implemented on aircraft such as the Lockheed L and the Airbus A, and active flutter suppression has not achieved operational status on any civil aircraft.

In the early s, the first practical demonstration of active flutter suppression   without conflicts: flutter suppression, maneuver load control, ride control, and fatigue load reduction (Figures 5 & 6).

Significant gains in damping were obtained with the only the FMS system on and with all active systems on. The case involved flutter instabilities of the mild nature at a low frequency of about Hz. That is, the loss of The possible use of active control systems and some combinations of passive and active systems, so called hybrid systems, as a means of structural protection against BBB's Business Review for Active Control Systems, Business Reviews and Ratings for Active Control Systems in Bellbrook, ://(ACS).html.

active blade tip, and active blade flap are presented, with emphasis on experimental results. Then, fixed wing aircraft applications are considered. Experiments of active flutter control, buffet suppression, gust load alleviation, and sonic fatigue reduction are discussed.

Conclusions and directions for further work are presented. Active control systems for load alleviation, flutter suppression and ride control, AGARD-AG[R]. London: Technical Editing and Reproduction Ltd., [] Advanced Aeroservoelastic testing and data analysis, AGARD-CP[R].

Hull: Canada []Particularly, the use of piezoelectric transducers arises as one of the potential solutions in the design of gust load alleviation and structural mode suppression systems. In this paper, the gust load alleviation on a flexible smart idealized wing using only piezoelectric transducers is analyzed and experimentally ://Gust load alleviation (GLA) control systems attempt to attenuate aircraft loads caused by the aircraft flying through gust zone.

4 Active control technology (ACT) has been proved to be useful for alleviating the internal loads and accelerations at some particular stations of the aircraft while in turbulence. 5 Some control theories such as the