Korea Advanced Institute of Science and Technology · Engineering
Professor Jae-Hung Han's research lab specializes in smart structures and active vibration control, focusing on the integration of piezoelectric sensors and actuators in lightweight composite materials for structural health monitoring and dynamic suppression. The lab also pioneers bio-inspired design of flapping-wing micro air vehicles (FWAVs), combining structural mechanics, aerodynamics, and biomimetic actuation—particularly using macro-fiber composites (MFCs)—to achieve efficient, agile flight. Additionally, the lab develops advanced plasma-based flow control devices for aerospace applications, emphasizing efficient, low-cost modeling of electrohydrodynamic actuators. Their work bridges theoretical modeling, experimental validation, and real-world applications in aeronautics and structural dynamics.
Figures are computed from collected data and may differ slightly.
In this paper, the placement of piezoelectric sensors and actuators has been studied. Genetic algorithms have been used to find efficient locations of piezoelectric sensors and actuators of a smart composite place. Locations of both sensors and actuators have been determined with consideration of controllability, observability and spillover prevention. The composite specimen with piezoelectric sensors and actuators has been prepared according to the optimization result. The experimental vibratio
In order to reduce the vibrational level of lightweight composite structures, active vibration control methods have been applied both numerically and experimentally. Using the classical laminated beam theory and Ritz method, an analytical model of the laminated composite beam with piezoelectric sensors and actuators has been developed. Smart composite beams and plates with surface-bonded piezoelectric sensors and actuators were manufactured and tested. It is found that the developed analytical m
This study describes the development of a bio-mimetic flapping wing and the aerodynamic characteristics of a flexible flapping wing. First, the flapping wing is designed to produce flapping, twisting, and camber motions by using a bio-mimetic design approach. A structural model for a macro-fiber composite (MFC) actuator is established, and structural analysis of a smart flapping wing with the actuator is performed to determine the wing configuration for maximum camber motion. The analysis model
Bio-inspired design to make artificial flappers fly does not just imitate biological systems as closely as possible, but also transferring the flappers' own functionalities to engineering solutions. This paper summarizes some key technical issues and the states-of-art of bio-inspired design of flapping UAVs with an introduction to authors' recent research results in this field.
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