Showing 401 - 420 results of 2,815 for search '"helicopters"', query time: 0.24s Refine Results
  1. 401
  2. 402

    Actuator Fault Estimation and Reconfiguration Control for the Quad-Rotor Helicopter by Fuyang Chen, Wen Lei, Gang Tao, Bin Jiang

    Published 2016-02-01
    “…In this paper, an improved reconfiguration control scheme via an H ∞ fault observer and adaptive control is studied for the quad-rotor helicopter with actuator faults. The bilinear problem is eliminated by constructing fault compensation and control law reconfiguration in the adaptive controller. …”
    Get full text
    Article
  3. 403
  4. 404

    NOISE PROTECTION EQUIPMENT SYSTEM FOR CENTRIFUGING HELICOPTER SPAR TUBES by Yulia Anatolyevna Proskoryakova, Petr Danilovich Motrenko

    Published 2013-09-01
    “…The experimental results of noise and vibration in the section of the centrifugal treatment of the helicopter longeron tubes are given. Noise sources determining very high level increase over limitary spectra are identified. …”
    Get full text
    Article
  5. 405
  6. 406

    DETERMINATION OF OPTIMAL AZIMUTH FOR MOUNTING ULTRALIGHT COAXIAL HELICOPTER BLADES by Vitaly V. Dudnik, Vladimir A. Kolot

    Published 2011-06-01
    “…The possibility of reducing vibration of the ultralight coaxial helicopter blades on the through harmonic wave by mounting blades on the optimal azimuth is shown. …”
    Get full text
    Article
  7. 407

    Reliability Analysis of Sensor Module of Helicopter Emergency Floating System by GUO Xing, SUN Jianhong, LI Mingqi, MA Fangyun, SUN Zhi

    Published 2020-08-01
    Subjects: “…helicopter emergency floating system…”
    Get full text
    Article
  8. 408
  9. 409
  10. 410
  11. 411

    Portable Biosensors for Psychophysiological Stress Monitoring of a Helicopter Crew by Marta Vicente-Rodríguez, Damián Iglesias Gallego, Juan Pedro Fuentes-García, Vicente Javier Clemente-Suárez

    Published 2020-11-01
    “…This study aims to analyze the psychophysiological stress response of a helicopter crew using portable biosensors, and to analyze the psychophysiological stress response differences of experienced and non-experienced crew members. …”
    Get full text
    Article
  12. 412

    Model Predictive Control for a Small Scale Unmanned Helicopter by Jianfu Du, Konstantin Kondak, Markus Bernard, Yaou Zhang, Tiansheng Lü, Günter Hommel

    Published 2008-11-01
    “…Based on these equations a model predictive control (MPC) method is proposed for controlling the helicopter. This novel method allows the direct accounting for the existing time delays which are used to model the dynamics of actuators and aerodynamics of the main rotor. …”
    Get full text
    Article
  13. 413

    Study of Solid Particle Erosion on Helicopter Rotor Blades Surfaces by Xupeng Bai, Yongming Yao, Zhiwu Han, Junqiu Zhang, Shuaijun Zhang

    Published 2020-02-01
    “…In this study, titanium alloy (Ti-4Al-1.5Mn), magnesium alloy (Mg-Li9-A3-Zn3), or aluminum alloy (Al7075-T6) were used to construct the shell model of helicopter rotor blade to study the solid particle erosion of helicopter rotor blades. …”
    Get full text
    Article
  14. 414
  15. 415
  16. 416
  17. 417
  18. 418
  19. 419
  20. 420

    Aerodynamically Efficient Rotor Design for Hovering Agricultural Unmanned Helicopter by B. A. Haider, C. H. Sohn, Y. S. Won, Y. M. Koo

    Published 2017-01-01
    Subjects: “…Agricultural unmanned helicopter; Airfoil; Computational fluid dynamics; Hover performance; Rotor blade optimization.…”
    Get full text
    Article