Biological dynamical subsystems of hovering flight
β Scribed by Karl Gustafson
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 928 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0378-4754
No coin nor oath required. For personal study only.
β¦ Synopsis
Elsewhere we have reported our simulations of general hovering aerodynamics as practiced, for example, by hummingbirds and dragonflies. These studies explain rather satisfactorily from the point of view of partial differential equations (Navier-Stokes) how such high lift is generated in such motions. Excellent match with laboratory findings is achieved. In this paper, I will first bring up-to-date these studies. New results include a study of the qualitative features of these motions, treated as a nonlinear dynamical system. Lift phase portraits and power spectra reveal a progression up the bifurcation ladder through periodic and increasingly complicated aperiodic motions toward chaos. A connection to the inertial manifold framework is established. A new structural stability theory is postulated for such dynamical systems.
Secondly, I will bring together here for the first time a synthesis of other key dynamical subsystems which enter critically into the success of the total dynamical system description of hummingbird, dragonfly and similar hovering species. These include thermodynamical, structural dynamical, neurodynamical systems. Of necessity my treatment of these will be brief.
π SIMILAR VOLUMES
## Abstract A computational fluid dynamics (CFD) analysis was conducted to study the unsteady aerodynamics of a virtual flying bumblebee during hovering flight. The integrated geometry of bumblebee was established to define the shape of a threeβdimensional virtual bumblebee model with beating its w
We explore the collective response of an uncoupled parallel array of saturating dynamical subsystems to a noisy periodic or random signal. Numerical simulation results show that a parallel array of nonlinear saturating subsystems can enhance the signal transmission via tuning the internal noise inte
## Abstract This paper addresses system identification of a switched system in which each subsystem is expressed by a piecewise affine system. The system considered is expressed by a mixed logical dynamical system for which some design methods are already known. For identification, in most cases, a