Optimized flapping wing dynamics via DMOC approach

Terze, Zdravko; Pandža, Viktor; Kasalo, Marko; Zlatar, Dario

doi:10.1007/s11071-020-06119-y

Cited by 10 publications

(1 citation statement)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained force data was fitted by mathematical empirical formulas to approximate these unsteady mechanisms. Owing to the high precision and intuitive analytical expression for the unsteady mechanisms, it has been widely used in the optimization of wing kinematics [12], dynamic modelling [13] and controller design [14].…”

Section: Introductionmentioning

confidence: 99%

Limit cycle oscillation suppression controller design and stability analysis of the periodically time-varying flapping flight dynamics in hover

et al. 2022

View full text Add to dashboard Cite

The periodically time-varying forces make the equilibrium state of Beihawk, an X-shaped flapping-wing aircraft, to be a periodic limit cycle oscillation. However, traditional controllers based on averaging theory fail to suppress this oscillation and the derived stability result may be inaccurate. In this study, a period-based method is proposed to design the oscillation suppression controller, locate the corresponding cycle and analyze its stability. A periodically time-varying wing-tail interaction model is built and Discrete Fourier Transform is applied to adapt the model for controller design. The harmonics less than quintuple flapping frequency account for more than 96 percent of the total harmonics and are reserved to present a concise model. Based on this model, Active Disturbance Rejection Controller (ADRC) is designed and its Extended State Observer can observe the disturbance to suppress the oscillation.Poincaré map is introduced to convert the stability analysis of the cycle to a fixed point. A multiple shooting method is adopted to locate several points on the cycle and

show abstract

Section: Introductionmentioning

confidence: 99%