Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Terrence A. Weisshaar"'
Publikováno v:
Journal of Aircraft. 51:727-739
Reconfigurable aircraft are capable of in-flight shape change to increase mission performance or provide multimission capability. This paper examines a fundamental issue raised by aircraft reconfigurability: design of an optimal, lightweight structur
Autor:
Terrence A. Weisshaar
Publikováno v:
Journal of Aircraft. 50:337-353
The term ‘morphing aircraft’ describes a broad range of air vehicles and vehicle components that adapt to planned and unplanned multipoint mission requirements. Adaptation or morphing requires changing system features including vehicle ‘states,
Publikováno v:
Journal of Aircraft. 50:615-625
An alternative to vertical tails, wing-tip fins, a type of winglet, provide yaw stability and control and some operational and maintenance advantages. Winglets reduce wing-induced drag but may reduce flutter speed, requiring wing stiffening and a str
Autor:
Terrence A. Weisshaar, David K. Duke
Publikováno v:
Journal of Aircraft. 43:157-164
This paper describes the use of full-span deforming control surfaces (including controlled chordwise cambering of the wing) to provide effective subsonic induced drag control with precise control of the spanwise lift distribution. Examples of these p
Autor:
Eli Livne, Terrence A. Weisshaar
Publikováno v:
Journal of Aircraft. 40:1047-1065
Publikováno v:
Journal of Aircraft. 39:227-233
Reducing aircraft design cycle time while improving product quality requires improved information e ow, process optimization, and use of advanced computational methods, including optimization, at critical times during the design process. Computer tec
Publikováno v:
Smart Materials and Structures. 5:216-224
The purpose of this work is to design an active control system for flutter suppression of a laminated plate wing model using segmented piezo-actuators. We describe investigations pertaining to the optimal size, thickness and locations of piezo-actuat
Autor:
Terrence A. Weisshaar, Robert C. Scott
Publikováno v:
Journal of Aircraft. 31:213-222
Piezoelectrics and shape memory alloys may be used as integrated actuators to control supersonic flutter of flat panels because panel strain and stiffness can be actively controlled. This article uses a Rayleigh Ritz panel flutter model to analyze th
Autor:
Shinji Suzuki, Terrence A. Weisshaar
Publikováno v:
Journal of the Japan Society for Aeronautical and Space Sciences. 42:455-461
Publikováno v:
Journal of Aircraft. 30:534-540
Piezoelectric actuators are embedded in an idealized laminated composite wing structure that can adapt to changing flight conditions. A feedback control system senses wing roots strains and then applies a proportional voltage to active actuator layer