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Now showing items 31-40 of 41
From passive to active pitch regulation of wind turbines: Optimization method with numerical validation
(ASME, 2015)
An optimization method that changes the control strategy of the Horizontal Axis Wind Turbine (HAWT) from passive- to active-pitch has been developed. The method aims to keep the rated power constant by adjusting the blade ...
Nano-boron as an antibacterial agent for functionalized textiles
(Cambridge University Press, 2015-01)
The antibacterial properties of boron-containing compounds are well known although there are limited studies available on the pure boron nanoparticles. In this study boron nano-particles were characterized in terms of their ...
Natural convection immersion cooling with enhanced optical performance of light-emitting diode systems
(2015-10-15)
Electronics driven at high currents may experience local hot spots, which may cause thermal degradation or even catastrophic failures. This common problem occurs at light-emitting diode (LED) chips and it is not easily ...
A computational study on the momentum and heat transfer distribution of a low frequency round impinging synthetic jet
(ASME, 2015)
Impinging synthetic jets have been considered as a possible solution for cooling miniature structures. It has been shown that synthetic jet performance is sensitive to the distance between the jet nozzle and the target ...
Pattern generation and compliant feedback control for quadrupedal dynamic trot-walking locomotion: experiments on roboCat-1 and hyQ
(Springer Science+Business Media, 2015-04)
In this paper, we introduce a method that synergistically combines an analytical pattern generator and a feedback controller frame, which are developed for the purpose of synthesizing dynamic quadrupedal trot-walking ...
On the EMG-based torque estimation for humans coupled with a force-controlled elbow exoskeleton
(IEEE, 2015)
Exoskeletons are successful at supporting human motion only when the necessary amount of power is provided at the right time. Exoskeleton control based on EMG signals can be utilized to command the required amount of support ...
Proof of concept for robot-aided upper limb rehabilitation using disturbance observers
(IEEE, 2015-02)
This paper presents a wearable upper body exoskeleton system with a model-based compensation control framework to support robot-aided shoulder-elbow rehabilitation and power assistance tasks. To eliminate the need for EMG ...
Torque and variable stiffness control for antagonistically driven pneumatic muscle actuators via a stable force feedback controller
(IEEE, 2015)
This paper describes a novel controller that is capable of simultaneously controlling torque and variable stiffness in real-time, for actuators with antagonistically driven pneumatic artificial muscles (PAMs). To this end, ...
Towards balance recovery control for lower body exoskeleton robots with variable stiffness actuators: spring-loaded flywheel model
(IEEE, 2015)
This paper presents a biologically-inspired real-time balance recovery control strategy that is applied to a lower body exoskeleton with variable physical stiffness actuators at its ankle joints. For this purpose, a torsional ...
Environmental force estimation for a robotic hand : compliant contact detection
(IEEE, 2015)
This paper presents a model based compensation method to enable environmental force estimation for a robotic hand with no tactile or force sensors. To this end, we utilize multi-joint robot dynamics and disturbance observer ...
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