Multifunctional composite kirigami skins for aerodynamic control

2020 ◽  
Vol 117 (25) ◽  
pp. 254105
Author(s):  
Lawren Gamble ◽  
Aaron Lamoureux ◽  
Max Shtein
Keyword(s):  
Aerodynamic Control

MEMS for aerodynamic control

1997 ◽  
Author(s):  
Motoaki Kimura ◽  
Steve Tung ◽  
Chih-Ming Ho ◽  
Fukang Jiang ◽  
Yu-Chong Tai ◽  
...  
Keyword(s):  
Aerodynamic Control

Exploring research on high-speed vehicle attitude control with plasma virtual flap manipulation

2018 ◽  
Vol 233 (10) ◽  
pp. 3627-3634
Author(s):  
Wang Xin ◽  
Yan Jie ◽  
Zhang Yerong
Keyword(s):  
Attitude Control ◽  
High Speed ◽  
Long Duration ◽  
Aerodynamic Control ◽  
Control Authority ◽  
Attitude Controller ◽  
Lift And Drag ◽  
Cruise Flight ◽  
Aerodynamic Lift ◽  
High Speed Vehicle

This work provides an attitude solution for a high-speed vehicle using plasma aerodynamic control called “plasma virtual flap” manipulation. This paper describes the concept of using plasma active control as plasma virtual flap for off-design attitude manipulation problem. Design of an attitude controller considering plasma aerodynamic effects for the high-speed vehicle is presented. The aerodynamic lift and drag force features in the high speed, long duration cruise flight with plasma actuator effect are introduced, where the estimated models and attitude controller are established. This paper documents the development and capabilities of plasma virtual flap attitude control authority. Simulation results are presented to exhibit the effectiveness of the proposed method.

Wind-induced responses of tall buildings under combined aerodynamic control

2018 ◽  
Vol 175 ◽  
pp. 86-100 ◽  
Author(s):  
Chaorong Zheng ◽  
Yu Xie ◽  
Mahram Khan ◽  
Yue Wu ◽  
Jing Liu
Keyword(s):  
Tall Buildings ◽  
Induced Responses ◽  
Aerodynamic Control

scholarly journals Methodology for the engineering calculation of flaps on Wind Turbines using BEM codes

2016 ◽  
Author(s):  
Maria Aparicio-Sanchez ◽  
Alvaro Gonzalez-Salcedp ◽  
Sugoi Gomez-Iradi ◽  
Xabier Munduate
Keyword(s):  
Three Dimensional ◽  
Unsteady Aerodynamics ◽  
Engineering Calculation ◽  
Root Effect ◽  
Validation And Verification ◽  
Momentum Theory ◽  
Aerodynamic Control ◽  
Control Devices ◽  
Circulation Theory ◽  
Blade Element

Abstract. Aeroelastic codes based on Blade Element Momentum theory are the standard used by many wind turbine designers. These codes usually include models and corrections for unsteady aerodynamics, tip and root effect, tower shadow and other effects. In general, this kind of codes does not include models to adequately simulate aerodynamic control devices. This paper presents a method to take into account the unsteady contributions due to the flap motion (based on indicial models) and the spanwise effects (based on circulation theory), in order to simulate flaps on the blades. This method can be included in BEM codes in general and it could also be applied to another kind of control devices. The validation and verification show the accuracy of this method using experimental data for two-dimensional unsteady cases, and CFD for three-dimensional steady and unsteady cases.

scholarly journals Disturbance Observer-Based Adaptive Control of Hypersonic Vehicles with Constrained Actuators

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Guan Wang ◽  
Li Li ◽  
Weihua Li ◽  
Huajun Zhou ◽  
Changbo Ma ◽  
...  
Keyword(s):  
Disturbance Observer ◽  
Input Saturation ◽  
Adaptive Controller ◽  
Hypersonic Vehicles ◽  
Control Allocation ◽  
External Disturbances ◽  
Nonlinear Disturbance Observer ◽  
Aerodynamic Control ◽  
Actuator Constraints ◽  
Control Surfaces

This study investigates an adaptive controller for the flexible air-breathing hypersonic vehicles (AHVs) subject to external disturbances and actuator constraints. The combination of nonlinear disturbance observer and adaptive mechanism is exploited to design an adaptive controller for each subsystem. For the velocity subsystem, an auxiliary system is employed to handle the scramjet input saturation issue. For the altitude subsystem, the magnitude/rate constraints and the dynamics of aerodynamic control surfaces are addressed by the control allocation module. Simulations show the effectiveness of the proposed control.

scholarly journals Longitudinal Actuated Abdomen Control for Energy Efficient Flight of Insects

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5480
Author(s):  
Titilayo Ogunwa ◽  
Blake McIvor ◽  
Nurkhairunisa Awang Jumat ◽  
Ermira Abdullah ◽  
Javaan Chahl
Keyword(s):  
Energy Efficient ◽  
Insect Flight ◽  
Design Feature ◽  
Unmanned Aircraft ◽  
Longitudinal Control ◽  
Flight Behaviour ◽  
Aerodynamic Control ◽  
The Cost ◽  
And Control ◽  
Control Surfaces

The actuated abdomens of insects such as dragonflies have long been suggested to play a role in optimisation and control of flight. We have examined the effect of this type of actuation in the simplified case of a small fixed wing aircraft to determine whether energetic advantages exist in normal flight when compared to the cost of actuation using aerodynamic control surfaces. We explore the benefits the abdomen/tail might provide to balance level flight against trim changes. We also consider the transient advantage of using alternative longitudinal control effectors in a pull up flight maneuver. Results show that the articulated abdomen significantly reduces energy consumption and increase performance in isolated manoeuvres. The results also indicate a design feature that could be incorporated into small unmanned aircraft under particular circumstances. We aim to highlight behaviours that would increase flight efficiency to inform designers of micro aerial vehicles and to aid the analysis of insect flight behaviour and energetics.

Aerodynamic Control System for a Deployable Re-entry Capsule

2020 ◽  
Author(s):  
Alberto Fedele ◽  
Salvatore Carannante ◽  
Michele Grassi ◽  
Raffaele Savino
Keyword(s):  
Control System ◽  
Aerodynamic Control
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