The advances in pervasive communication, sensing and computing of wireless sensor networks technologies are leading to the emergence of wireless sensor-actor networks. The spreading merit of WSAN has led to increasing interest in rendering them with expert knowledge to be smart and autonomous networks, which have the potential to enable a large class of applications in multiple fields. Fusion o...

Significant structural vibration is an undesirable characteristic in helicopter flight that leads to structural fatigue, poor ride quality for passengers and high acoustic signature for the vehicle. Previous Individual Blade Control (IBC) techniques based on piezoelectric actuator schemes to reduce these effects have been hindered by electromechanical limitations of piezoelectric actuators. The...

Wireless sensor and actuator networks provide a distributed system composed of wirelessly connected smart sensor and actuator nodes, suitable for cost-efficient control applications. An important research challenge is deployment, where features like node auto-configuration, unattended operation, and Internet connectivity are becoming mandatory. Moreover, on off-the-shelf solutions the user typi...

A novel fast tool servo driven by piezoelectric actuator for precision diamond turning is designed in this paper. To overcome the inherent hysteresis and drift nonlinearity effect of the piezoelectric actuator, a closed-loop control system is established using strain gauge integrated in the actuator for position feedback, which has compact structure and can avoid interference in the machining. ...

With the increasing popularity of actuators involving smart materials like piezoelectric, control of such materials becomes important. The existence of the inherent hysteretic behavior hinders the tracking accuracy of the actuators. To make matters worse, the hysteretic behavior changes with rate. One of the suggested ways is to have a feedforward controller to linearize the relationship betwee...

This paper presents a novel sensing technique which uses a piezoelectric strain sensor for damping and accurate tracking of a nanopositioning stage. Piezoelectric elements have been used effectively as sensors for vibration control of smart structures. However, complications arise when one uses a piezoelectric strain sensor in a feedback loop for tracking. This is due to the high-pass character...

The evaluation of transmission zeros is great importance for the control engineering applications. structures equipped with piezoelectric patches are complex to model and usually require finite element approaches supplemented by reduction. This study rigorously investigates influence mesh size, reduction, boundary conditions (free clamped), sensor/actuator configuration (collocated non-collocat...

Vibration mitigation is a prominent matter in several engineering fields. Several adverse phenomena are related to vibrations, such as fatigue, noise, etc. The availability of smart materials increases the solutions for both vibration damping and energy harvesting applications. Piezoelectric seem be most promising these However, their positioning significantly affects efficiency. studies were p...

Many kinds of stimuli-responsive polymer gels that respond to the change in their surroundings such as solvent composition, temperature, pH, and supply of electric field have been developed. They are of interest as intelligent (or smart, biomimetic) materials which have sensor, processor, and actuator functions. This article is related to stimuliresponsive gels and their application for bioor b...

piezoelectric actuators are widely used in micro manipulation applications. however hysteresis nonlinearity limits accuracy of these actuators. this paper presents a novel approach utilizing a piezoelectric nano-stage as slave manipulator of a teleoperation system. the prandtl-ishlinskii (pi) model is used to model actuator hysteresis in feedforward scheme to cancel out this nonlinearity. a pas...