Journal ArticleDOI
A feasibility study of using smart materials for rotor control
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TLDR
Preliminary data show that rotor control using smart materials might be feasible if a combination of smart materials is used and the rotor design is driven towards low control loads and motions.Abstract:
Rotor actuation in the rotating system promises a quantum jump in overall rotor craft performance. Smart material actuator technology for operation `on the blade' is now becoming available and has the potential to overcome the size, weight, and complexity issues of hydraulic and electric on-rotor actuation. The present paper is based on the results of a feasibility study to investigate the use of smart materials for primary and active control on the AH-64 helicopter. Based on the results of the study, it is seen that imbedded actuator concepts, i.e. pitch, twist, and camber control, are not practical at this time. Servoflap control, using hinged control surfaces driven by discrete actuators emerges as the most suitable candidate for smart material actuation. Preliminary data show that rotor control using smart materials might be feasible if a combination of smart materials is used and the rotor design is driven towards low control loads and motions.read more
Citations
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Journal ArticleDOI
Review of state of the art in smart rotor control research for wind turbines
TL;DR: A review of the state of the art and present status of active aeroelastic rotor control research for wind turbines is presented in this paper, where the authors discuss the potential of load reduction using smart rotor control concepts.
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Smart Structures and Materials
TL;DR: In this article, the authors introduce the concept of Smart Structures and Materials and present a scenario of the future of smart structures and their use in building and the future building scenarios.
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Vibration reduction in rotorcraft using active control - A comparison of various approaches
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Review of morphing concepts and materials for wind turbine blade applications
TL;DR: In this article, a review of the most relevant concepts for morphing structures and materials that achieve compliant shape adaptation for wind turbine blades is presented, highlighting the key challenge of replacing the stiff and strong design of current blades with more compliant structures.
References
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Proceedings ArticleDOI
A Study on the Feasibility of Using Adaptive Structures in the Attenuation of Vibration Characteristics of Rotary Wings.
F. Nitzsche,E. Breitbach +1 more
TL;DR: In this article, the feasibility of employing adaptive material to build both sensors and actuators to attenuate the higher harmonic loads developed at the helicopter rotor blades using the elastic flatwise bending and the first elastic torsion modes of a single blade deserve special attention in the vibration control.
Journal ArticleDOI
Smart Structures in the Control of Airframe Vibrations
Sathya Hanagud,G. L. Nagesh Babu +1 more
Proceedings ArticleDOI
Integrated actuation system for individual control of helicopter rotor blades
Dariusz A. Bushko,Ralph C. Fenn,Michael J. Gerver,John R. Berry,Frank Phillips,Donald J. Merkley +5 more
TL;DR: In this paper, a Terfenol-D-based actuator was used to dampen momentary blade vibrations. But the performance of the actuator is limited due to the small size of the rotor blades and the relatively low rate of rotor motion.