Aeroservoelastic and structural dynamics research on smart structures conducted at NASA Langley Research Center

An overview of smart structures research currently underway at the NASA Langley Research Center in the areas of aeroservoelasticity and structural dynamics is presented. Analytical and experimental results, plans, potential technology pay-offs, and challenges are discussed. The goal of this research is to develop the enabling technologies to actively and passively control aircraft and rotorcraft vibration and loads using smart devices. These enabling technologies and related research efforts include developing experimentally-validated finite element and aeroservoelastic modeling techniques; conducting bench experimental tests to assess feasibility and understand system trade-offs; and conducting large-scale windtunnel tests to demonstrate system performance. The key aeroservoelastic applications of this research include: active twist control of rotor blades using interdigitated electrode piezoelectric composites and active control of flutter, and gust and buffeting responses using discrete piezoelectric patches. In addition, NASA Langley is an active participant in the DARPA/ Air Force Research Laboratory/ NASA/ Northrop Grumman Smart Wing program which is assessing aerodynamic performance benefits using smart materials.

[1]  W. Keats Wilkie,et al.  Rotorcraft Aeroelastic Testing in the Langley Transonic Dynamics Tunnel , 1993 .

[2]  Randall M. Hauch,et al.  Industrial approach to static and dynamic finite element modeling of composite structures with embedded actuators , 1995, Smart Structures.

[3]  Nesbitt W. Hagood,et al.  Improving transverse actuation of piezoceramics using interdigitated surface electrodes , 1993, Smart Structures.

[4]  Anna-Maria Rivas McGowan,et al.  The Aircraft Morphing Program , 1998 .

[5]  A R McGowan,et al.  Piezoelectric power requirements for active vibration control , 1997, Smart Structures.

[6]  Andrew S. Bicos,et al.  Structural vibration damping experiments using improved piezoelectric shunts , 1997, Smart Structures.

[7]  R. Bryant,et al.  Thin-layer composite unimorph ferroelectric driver and sensor properties , 1998 .

[8]  Vit Babuska,et al.  Finite element modeling of composite piezoelectric structures with MSC/NASTRAN , 1997, Smart Structures.

[9]  W Moses Robert,et al.  Active Vertical Tail Buffeting Alleviation on a Twin-Tail Fighter Configuration in a Wind Tunnel , 1997 .

[10]  N. Hagood,et al.  Anisotropic Actuation with Piezoelectric Fiber Composites , 1995 .

[11]  Nesbitt W. Hagood,et al.  Improved performance in piezoelectric fiber composites using interdigitated electrodes , 1995, Smart Structures.

[12]  Wilkie W. Keats,et al.  Aeroelastic Analysis of Helicopter Rotor Blades Incorporating Anisotropic Piezoelectric Twist Actuation , 1996 .

[13]  Fu-Kuo Chang,et al.  Finite element analysis of composite structures containing distributed piezoceramic sensors and actuators , 1992 .

[14]  Ronald L. Spangler,et al.  Active vibration-suppression systems applied to twin-tail buffeting , 1998, Smart Structures.

[15]  W. Keith Belvin,et al.  Spacecraft Jitter Attenuation Using Embedded Piezoelectric Actuators , 1995 .

[16]  Anna-Maria Rivas McGowan,et al.  Results of wind-tunnel testing from the piezoelectric aerostatic response tailoring investigation , 1996 .

[17]  Youdan Kim,et al.  Optimal design of composite lifting surface for flutter suppression with piezoelectric actuators , 1995 .