&lt;title&gt;Overview of smart structure concepts for helicopter rotor control&lt;/title&gt;

Narkiewicz, J.; Done, G.T.S.

doi:10.1117/12.184836

Cited by 9 publications

(7 citation statements)

References 2 publications

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“…Narkiewicz and Done [16] in a review paper surveying the smart structures concept for helicopter rotor control, conclude that the practical application of the smart-materials concepts to full-scale rotors is currently not feasible because the existing actuators are unable to achieve sufficient actuating power and reliability. Kudva et al [11] report that currently it is only feasible to achieve torque requirements for the 16% models.…”

Section: Smart Structuresmentioning

confidence: 99%

Tailoring unconventional actuators using compliant transmissions: design methods and applications

Kota

Hetrick

et al. 1999

IEEE/ASME Trans. Mechatron.

104

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Matching a drive system to the force-displacement characteristics of the load is the cardinal principle in electromechanical systems design. Unconventional actuation schemes, such as piezoelectric, electrostatic, and shape-memory alloys (SMA's), seem to exhibit certain limitations in terms of power density, stroke length, bandwidth, etc., when one attempts to employ them directly to an application. Integrating them with mechanical transmission elements so that the integrated actuator-transmission system matches the load characteristics of the application can enhance the utility of such unconventional actuators. Conventional mechanical devices are sometimes difficult to integrate with unconventional actuating schemes. For instance, the two-dimensional nature of microelectromechanical systems (MEMS) and no-assembly constraints arising from their batch fabrication make it difficult to fabricate, assemble, and integrate a conventional micromechanism with an electrostatic actuator. However, a monolithic "solid-state" mechanical transmission device enables easy integration. This paper presents a systematic method of designing such unconventional mechanisms. The paper presents a generalized methodology for designing compliant mechanisms. Our systematic synthesis formulations provide a mathematical basis for designing compliant mechanisms for: 1) topology generation-that is, establishing a feasible configuration to meet given functional requirements and 2) size and shape optimization-to meet the prescribed quantitative performance requirements, such as mechanical advantage, stroke amplification, etc. Design examples illustrate integration with electrostatic, piezoelectric, and SMA actuators for MEMS and smart-structures applications.

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Section: Smart Structuresmentioning

confidence: 99%

Tailoring unconventional actuators using compliant transmissions: design methods and applications

Kota

Hetrick

et al. 1999

IEEE/ASME Trans. Mechatron.

104

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“…Helicopter applications of induced-strain actuation has received extensive attention (Giurgiutiu et al, 1994;Narkiewicz and Done, 1994;Chopra 1997). Conventional actuation solutions (hydraulics and electric motors) are impractical for on-blade actuation.…”

Section: Helicopter Applicationsmentioning

confidence: 99%

Recent advances in smart-material rotor control actuation

Giurgiutiu

2000

41st Structures, Structural Dynamics, and Materials Conference and Exhibit

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This paper reviews recent achievements in the application of active-materials actuation to counteract aeroelastic and vibration effects in helicopters and fixed wing aircraft. A brief review of the induced-strain actuation principles and capabilities is done first. Attention is focused on the smart rotor-blade applications. The induced twist, active blade tip, and active blade flap concepts are presented and discussed. A number of ingenious displacement amplifications methods, both solid-state and levered, are described. Emphasis is placed on experimental results that prove the expectations and reveal the possible limitations of each particular concept. Full-scale smart rotor efforts are also highlighted. Conclusions and directions for further work are presented

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Section: Helicopter Applicationsmentioning

confidence: 99%

Active-Materials Induced-Strain Actuation for Aeroelastic Vibration Control

Giurgiutiu¹

2000

The Shock and Vibration Digest

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Recent achievements in the application of activematerials induced-strain actuation to counteract aeroelastic and vibration effects in helicopters and fixed wing aircraft are reviewed. First, the induced-strain actuation principles and capabilities are briefly presented. Next, the attention is focused on the smart rotor blade applications. Induced twist, 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.

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<title>Overview of smart structure concepts for helicopter rotor control</title>

Cited by 9 publications

References 2 publications

Tailoring unconventional actuators using compliant transmissions: design methods and applications

Tailoring unconventional actuators using compliant transmissions: design methods and applications

Recent advances in smart-material rotor control actuation

Active-Materials Induced-Strain Actuation for Aeroelastic Vibration Control

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