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Home » Aerospace Engineering » Compact Rotor Actuator |
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Aerospace Engineering | ||
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Compact Rotor Actuator Phase II STTR Project funded by U.S. Army Techno-Sciences, Inc. (TSi), in collaboration with the Smart Structures Laboratory of the Alfred Gessow Rotorcraft Center at the University of Maryland (UMD), are working under STTR funding to develop an innovative Active Pitch Link (APL) Technology for improved active rotor performance. The APL exploits the superior performance characteristics of a new magnetostrictive material, GalFeNOL and nano-particle enhanced magneto-rheological (MR) fluid technology. This hybrid device efficiently marries two high-energy density electromechanical materials, GalFeNOL magnetostrictive material and magnetorheological fluids, to provide full-scale rotor control. 
The APL can be retrofitted to existing rotor systems and powered through an existing slip ring that powers rotor blade de-icing equipment. The control authority and bandwidth capability of the APL technology is expected to provide the full range of rotor control, encompassing primary flight control, Higher Harmonic Control (HHC) for vibration reduction and noise mitigation, and other maneuvering flight and gust loads reduction. Central to the proposed smart rotor concept is configuration of the adaptive material as a discrete component that does not require on-blade installation, and provides ease of maintenance. Although the APL is a hydraulic system, the pump, feed lines, and flow control valves, as well as all of the hydraulic working fluid, are contained within the APL system itself – no external hydraulic lines are needed to drive the APL as in conventional actuators, only electrical connections. |
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