Four Wing Flapping Micro Air Vehicles - Dragonies or X-Wings?

Orlowski, Christopher T.; Girard, Anouck; Shyy, Wei

doi:10.2514/6.2010-7707

Cited by 5 publications

(4 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Regarding insect-inspired aircraft, most of the multibody flight dynamics models in the literature focus on the degrees of freedom associated with wing motion. Although some strictly only consider the relative movement of the wings [35,43,[45][46][47][48][49], a few consider the effects of wing mass and inertia [38,50]. Fewer studies have considered the effect or role of abdominal articulation.…”

Section: Moving Masses In Insect Flightmentioning

confidence: 99%

“…Classical Euler transformation factors the change in reference frame using ordinary time derivatives, where additional terms appear in the equations of motion (EoMs) to account for the time-dependent coordinate transformations. Using the classical formulation, the resulting expression is not a tensor due to the extra terms from time-dependent changes in coordinates, resulting in equations that are often described as complex and cumbersome [42,50]. The formulation used in this study preserves the tensor formulation using the rotational time derivative operator, offering a few major advantages.…”

Section: Scope and Contributionsmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Control of an Articulated Multibody Aircraft

2022

View full text Add to dashboard Cite

Insects use dynamic articulation and actuation of their abdomen and other appendages to augment aerodynamic flight control. These dynamic phenomena in flight serve many purposes, including maintaining balance, enhancing stability, and extending maneuverability. The behaviors have been observed and measured by biologists but have not been well modeled in a flight dynamics framework. Biological appendages are generally comparatively large, actuated in rotation, and serve multiple biological functions. Technological moving masses for flight control have tended to be compact, translational, internally mounted and dedicated to the task. Many flight characteristics of biological flyers far exceed any technological flyers on the same scale. Mathematical tools that support modern control techniques to explore and manage these actuator functions may unlock new opportunities to achieve agility. The compact tensor model of multibody aircraft flight dynamics developed here allows unified dynamic and aerodynamic simulation and control of bioinspired aircraft with wings and any number of idealized appendage masses. The demonstrated aircraft model was a dragonfly-like fixed-wing aircraft. The control effect of the moving abdomen was comparable to the control surfaces, with lateral abdominal motion substituting for an aerodynamic rudder to achieve coordinated turns. Vertical fuselage motion achieved the same effect as an elevator, and included potentially useful transient torque reactions both up and down. The best performance was achieved when both moving masses and control surfaces were employed in the control solution. An aircraft with fuselage actuation combined with conventional control surfaces could be managed with a modern optimal controller designed using the multibody flight dynamics model presented here.

show abstract

Section: Moving Masses In Insect Flightmentioning

confidence: 99%

Section: Scope and Contributionsmentioning

confidence: 99%

Modeling and Control of an Articulated Multibody Aircraft

2022

View full text Add to dashboard Cite

show abstract

“…26, and a four wing FWMAV in Ref. 27. In brevity, the FWMAV is modeled as a system of three rigid bodies, two wings and a central body, where each wing is afforded three separate degrees of freedom.…”

Section: Multibody Flight Dynamics Modelmentioning

confidence: 99%

Averaging of the Nonlinear Dynamics of Flapping Wing Micro Air Vehicles for Symmetrical Flapping

Orlowski

Girard

2011

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Self Cite

View full text Add to dashboard Cite

First order equations of motion for a flapping wing micro-air vehicle are presented. The first order, longitudinal equations of motion are obtained from the second-order, strongly coupled, multi-body equations of motion using an approximate inverse. The nonlinear dynamics of the longitudinal equations of motion are averaged using two different methods: local averaging over a fully flapping cycle and local averaging over quarter-flapping cycles. Open loop simulations are presented, near a hover condition, for both averaged systems. The results for the locally averaged system are not consistent with the solution to the full system -suggesting that the neglecting of individual contributions to the dynamics, due to averaging over the entirety of a flapping cycle, is not a valid approach. Better results are obtained when the equations of motion are averaged over a quarter of a flapping cycle. The quarter-cycle results show a significant improvement in the accuracy of the position and orientation of the simulations versus the cycle averaged simulations.

show abstract

“…While some authors claim the need for devising complex equations of motion that model the flapping and have used, e.g., Newton-Euler's force principles [6], Kane's equations [7], Lagrange's energy-based methods [8] or d'Alembert's virtual work principle [9,10], other authors [11,12] have used simple aircraft equations of motion to simulate the behavior of bird-like FWMAV and have demonstrated dynamic model stability, as well as a flying simulation.…”

Section: Introductionmentioning

confidence: 99%