An Innovative All-Active Hybrid Actuation System Demonstrator

2017 ◽  
Author(s):  
Tobias Röben ◽  
Eike Stumpf ◽  
Guido Weber ◽  
Thomas Grom
Keyword(s):  
Actuation System ◽  
Hybrid Actuation

Theoretical Modeling for Electroactive Polymer-Ceramic Hybrid Actuation Systems

Aerospace ◽  
2004 ◽  
Author(s):  
Tian-Bing Xu ◽  
Ji Su
Keyword(s):  
Performance Optimization ◽  
High Performance ◽  
Electroactive Polymer ◽  
Actuation System ◽  
Electromechanical Responses ◽  
Electromechanical Performance ◽  
New Type ◽  
Hybrid Actuation ◽  
Actuation Systems ◽  
Further Development

An electroactive polymer-ceramic hybrid actuation system (HYBAS) was recently developed. The HYBAS demonstrates significantly-enhanced electromechanical performance by utilizing advantages of cooperative contributions of the electromechanical responses of an electrostrictive copolymer and an electroactive single crystal. The hybrid actuation system provides not only a new type of device but also a concept to utilize different electroactive materials in a cooperative and efficient method for optimized electromechanical performance. In order to develop an effective procedure to optimize the performance of a hybrid actuation system (HYBAS), a theoretical model has been developed, based on the elastic and electromechanical properties of the materials utilized in the system and on the configuration of the device. The model also evaluates performance optimization as a function of geometric parameters, including the length of the HYBAS and the thickness ratios of the constituent components. The comparison between the model and the experimental results shows a good agreement and validates the model as an effective method for the further development of high performance actuating devices or systems for various applications.

scholarly journals Design and operating mode analysis of hybrid actuation system based on EHA/SHA

2018 ◽  
Vol 2018 (13) ◽  
pp. 385-391
Author(s):  
Liu Zidong ◽  
Bai Zhiqiang ◽  
Xu Shuhan
Keyword(s):  
Operating Mode ◽  
Mode Analysis ◽  
Actuation System ◽  
Hybrid Actuation

Reliability Analysis of Hybrid Actuation Based on GSPN

2012 ◽  
Vol 430-432 ◽  
pp. 1914-1917
Author(s):  
Li Ming Yu ◽  
Shou Qiang Wei ◽  
Tian Tian Xing ◽  
Hong Liang Liu
Keyword(s):  
Petri Nets ◽  
System Reliability ◽  
Operating Mode ◽  
Stochastic Petri Nets ◽  
Hydraulic Actuator ◽  
Reliability Models ◽  
Operating Modes ◽  
Actuation System ◽  
Generalized Stochastic Petri Nets ◽  
Hybrid Actuation

Generalized stochastic Petri nets is adopted to develop the reliability models of two operating modes of the hybrid actuation system, which is composed of a SHA (Servo valve controlled Hydraulic Actuator), an EHA (Electro-Hydrostatic Actuator) and an EBHA (Electrical Back-up Hydrostatic Actuator).The dependability of hybrid actuation is got through the Markov chain which the Petri nets sate is isomorphic to and the Monte-Carlo simulation. Simulations are conducted to analyze influences of the operating mode and the fault coverage on system reliability of hybrid actuation system.

scholarly journals Implementation of a Hybrid Electro-Active Actuated Morphing Wing in Wind Tunnel

2017 ◽  
Vol 260 ◽  
pp. 85-91 ◽  
Author(s):  
Gurvan Jodin ◽  
Johannes Scheller ◽  
Eric Duhayon ◽  
Jean François Rouchon ◽  
Marianna Braza
Keyword(s):  
Wind Tunnel ◽  
Shape Memory ◽  
Low Frequency ◽  
Aerodynamic Performance ◽  
Point Of View ◽  
Morphing Wing ◽  
Wind Tunnel Experiments ◽  
Trailing Edge ◽  
Actuation System ◽  
Hybrid Actuation

Amongst current aircraft research topics, morphing wing is of great interest for improving the aerodynamic performance. A morphing wing prototype has been designed for wind tunnel experiments. The rear part of the wing - corresponding to the retracted flap - is actuated via a hybrid actuation system using both low frequency camber control and a high frequency vibrating trailing edge. The camber is modified via surface embedded shape memory alloys. The trailing edge vibrates thanks to piezoelectric macro-fiber composites. The actuated camber, amplitude and frequency ranges are characterized. To accurately control the camber, six independent shape memory alloy wires are controlled through nested closed-loops. A significant reduction in power consumption is possible via this control strategy. The effects on flow via morphing have been measured during wind tunnel experiments. This low scale mock-up aims to demonstrate the hybrid morphing concept, according to actuator capabilities point of view as well as aerodynamic performance.

A computational method for materials selection in a hybrid actuation system

2007 ◽  
Author(s):  
Benjamin J. Nickless ◽  
Ji Su ◽  
Tian-Bing Xu ◽  
James E. Hubbard, Jr.
Keyword(s):  
Computational Method ◽  
Materials Selection ◽  
Actuation System ◽  
Hybrid Actuation

Pitch and Roll Motion Control of a Floating Wind Turbine With Hybrid Actuation

2014 ◽  
Author(s):  
Kaveh Jalili ◽  
Yaoyu Li ◽  
Mario A. Rotea
Keyword(s):  
Degrees Of Freedom ◽  
Bending Moment ◽  
Offshore Wind ◽  
Load Testing ◽  
Combined System ◽  
Actuation System ◽  
Floating Offshore Wind Turbines ◽  
Standard Design ◽  
Equivalent Load ◽  
Hybrid Actuation

Platform stabilization and load reduction are of great importance for the successful development of floating offshore wind turbines. The increased degrees-of-freedom (DOF) for the relevant dynamics presents the challenge of underactuation. Recently, a tuned-mass damper (TMD) and active vane have been proposed to control the pitch and roll motions of a floating turbine platform. Simulations have indicated that TMD in the fore-aft (FA) direction cannot reduce the damage equivalent load (DEQL) for the side-to-side (SS) bending moment at the tower-base across all the loading conditions. In this study, the TMD in the FA direction is combined with an active vertical vane to reduce both the FA and SS platform motions and DEQLs. We refer to this combined system of actuation as the “hybrid actuation system”. The effectiveness of this hybrid scheme is demonstrated via simulations which are carried out in accordance with the IEC 61400-3 standard design load case 1.2–fatigue load testing.

Experimental Validation of a Hybrid Electrostrictive Hydraulic Actuator Analysis

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Anirban Chaudhuri ◽  
Norman M. Wereley
Keyword(s):  
Active Material ◽  
Length Change ◽  
Domain Model ◽  
Basic Operation ◽  
Fluid Inertia ◽  
Hydraulic Actuator ◽  
Factors Affecting ◽  
Actuation System ◽  
Viscous Losses ◽  
Hybrid Actuation

The basic operation of smart material-based hybrid electrohydraulic actuators involves high frequency bidirectional length change in an active material stack (or rod) that is converted to unidirectional motion of a hydraulic fluid by a set of valves. In this study, we present the design and measured performance of a compact hybrid actuation system driven by the single-crystal electrostrictive material PMN-32%PT. The active material was actuated at different frequencies with variations in the applied voltage, fluid bias pressure, and external load to study the effects on output velocity. The maximum actuator velocity was 330 mm/s and the corresponding flow rate was 42.5 cc/s; the blocked force of the actuator was 63 N. The results of the experiments are presented and compared with simulation data to validate a nonlinear time-domain model. Linearized equations were used to represent the active material while the inertia, viscous losses, and compressibility of the fluid were included using differential equations. Factors affecting system performance are identified and the inclusion of fluid inertia in the model is also justified.

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