The Experts below are selected from a list of 141846 Experts worldwide ranked by ideXlab platform
Sergey Edward Lyshevski - One of the best experts on this subject based on the ideXlab platform.
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Smart flight Control Surfaces with microelectromechanical systems
IEEE Transactions on Aerospace and Electronic Systems, 2002Co-Authors: Sergey Edward LyshevskiAbstract:Pitch, roll, and yaw moments can be developed by deflecting and changing the geometry of Control Surfaces. In this paper, smart flight Control Surfaces are designed using multi-node microelectromechanical systems (MEMS) to displace Control Surfaces and change the surface geometry. These MEMS augment translational motion microstructures (actuators-sensors), Controlling/signal processing integrated circuits (ICs), radiating energy devices and antennas. The desired pitch, roll, and yaw moments are produced, drag can be reduced, and unsteady aerodynamic flows are Controlled by smart flight Control Surfaces. That is, we achieve aerodynamic moment and active flow Control capabilities. The major objective here is to report fundamental and applied research in design of smart flight Control Surfaces with MEMS-based actuator-sensor-IC arrays Controlled by hierarchical distributed systems. We demonstrate the feasibility and effectiveness of the application of smart flight Control Surfaces for coordinated longitudinal and lateral vehicle Control.
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Nanotechnology for smart flight Control Surfaces
Proceedings of the 2nd IEEE Conference on Nanotechnology, 1Co-Authors: Sergey Edward LyshevskiAbstract:This paper focuses on the design of smart Control Surfaces for micro air vehicles using nano- and microscale actuators and sensors. These thin-film-based actuators/sensors are uniquely suitable for mini air vehicles, missiles, and interceptors. We use multi-layered microactuators (fabricated using thin-film technology) to displace and change the geometry of Control Surfaces. These thin-film actuators/sensors (transducers) are integrated as the large-scale arrays. Furthermore, nano- and microscale transducers should be Controlled changing the applied voltage supplied to each actuator or measuring the voltage induced by each sensor. The major objective of this paper is to report fundamental and applied research in modeling, analysis and design of flight Surfaces with thin-film-based actuator-sensor arrays Controlled by hierarchically distributed systems. We demonstrate the feasibility and effectiveness of the application of smart flight Surfaces for coordinated longitudinal and lateral vehicle Control (pitch, roll, and yaw moments are developed deflecting and changing the geometry of Control Surfaces). Active aerodynamic flow Control can be achieved in order to reduce the drag.
Masaru Uchiyama - One of the best experts on this subject based on the ideXlab platform.
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Development of a quad rotor tail-sitter VTOL UAV without Control Surfaces and experimental verification
Proceedings - IEEE International Conference on Robotics and Automation, 2013Co-Authors: Atsushi Oosedo, Tatuya Furui, Takuya Koizumi, Satoko Abiko, Atsushi Konno, Masaru UchiyamaAbstract:This paper presents development of a quad rotor tail-sitter VTOL UAV (Vertical Takeoff and Landing Unmanned Aerial Vehicle) which is composed of four rotors and a fixed wing. The conventional VTOL UAVs have a drawback in the accuracy of the attitude Control in stationary hovering because they were developed based on a fixed-wing aircraft and they used the Control Surfaces, such as aileron, elevator, and rudder for the attitude Control. To overcome such a drawback, we developed a quad rotor tail-sitter VTOL UAV. The quad rotor tail-sitter VTOL UAV realizes high accuracy in the attitude Control with four rotors like a quad rotor helicopter and achieves level flight like a fixed-wing airplane. The remarkable characteristic of the developed quad rotor tail-sitter VTOL UAV is that it does not use any Control Surfaces even in the level flight. This paper shows the design concept of the developed UAV and experimental verification of all flight modes including hovering, transition flight and level flight.
Fendy Santoso - One of the best experts on this subject based on the ideXlab platform.
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modeling autopilot design and field tuning of a uav with minimum Control Surfaces
IEEE Transactions on Control Systems and Technology, 2015Co-Authors: Ming Liu, Greg Egan, Fendy SantosoAbstract:While having the benefit of mechanical simplicity, model-scale unmanned aerial vehicles with only two elevon Control Surfaces present interesting challenges in dynamics modeling, autopilot design, and field tuning. Because of limited on-board computing and communication bandwidth, traditional Control theory was applied to systematically tune the proportional-integral-derivative-based (PID) autopilots offline. Based on the aerodynamic analysis, its multi-input, multi-output underactuated linear model configuration was deduced. Utilizing the real-time flight data collected from human-Controlled test flight, a two-input three-output linear model was obtained by means of system identification. It includes the transfer functions in the airspeed loop, heading loop, and altitude loop. The dynamic behavior of the aircraft was analyzed, and five PID Controllers in three loops were designed based on the root-locus techniques. The Controllers were implemented and further tuned in field flights with improved performances. We demonstrate that with proper precautions, traditional Control theory can be used to solve complex Control problems that are often tackled with nonlinear Control algorithms.
S.h. Chao - One of the best experts on this subject based on the ideXlab platform.
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ON THE DYNAMICS OF FLIGHT VEHICLE Control Surfaces WITH INERTIA COUPLING
Mechanical Systems and Signal Processing, 1996Co-Authors: Shih-ming Yang, S.h. ChaoAbstract:Abstract The influence of structure modal parameters on the dynamics of an integrated actuator and Control surface system is studied in this paper. The Control surface is modeled as a uniform thickness plate mounted on a push-pull hydraulic actuator. The transfer function between the command and measurement signal is formulated by including the Control surface moment of inertia, actuator dynamics and most importantly, an inertia coupling term governing the Control surface rigid-body motion and its flexible mode dynamics, It is shown that the resonance frequency of the integrated system is made lower by the flexible mode dynamics. However, the system performance can be improved by minimising the torsion-dominated modes.
Atsushi Oosedo - One of the best experts on this subject based on the ideXlab platform.
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Development of a quad rotor tail-sitter VTOL UAV without Control Surfaces and experimental verification
Proceedings - IEEE International Conference on Robotics and Automation, 2013Co-Authors: Atsushi Oosedo, Tatuya Furui, Takuya Koizumi, Satoko Abiko, Atsushi Konno, Masaru UchiyamaAbstract:This paper presents development of a quad rotor tail-sitter VTOL UAV (Vertical Takeoff and Landing Unmanned Aerial Vehicle) which is composed of four rotors and a fixed wing. The conventional VTOL UAVs have a drawback in the accuracy of the attitude Control in stationary hovering because they were developed based on a fixed-wing aircraft and they used the Control Surfaces, such as aileron, elevator, and rudder for the attitude Control. To overcome such a drawback, we developed a quad rotor tail-sitter VTOL UAV. The quad rotor tail-sitter VTOL UAV realizes high accuracy in the attitude Control with four rotors like a quad rotor helicopter and achieves level flight like a fixed-wing airplane. The remarkable characteristic of the developed quad rotor tail-sitter VTOL UAV is that it does not use any Control Surfaces even in the level flight. This paper shows the design concept of the developed UAV and experimental verification of all flight modes including hovering, transition flight and level flight.