Abstract Shape memory alloy-based flexible instruments have potential for enhancing the safety in minimally invasive surgery compared to passive rigid devices. We developed a data-driven polynomial model estimate deflection of 2D bending actuator using electrical resistance. The accurately predicts deflections (mean error <3.6 mm), but force sensing augmentation is required unknown load case...

in this paper a novel direct adaptive fuzzy system is proposed to control flexible-joints robot including actuator dynamics. the design includes two interior loops: the inner loop controls the motor position using proposed approach while the outer loop controls the joint angle of the robot using a pid control law. one novelty of this paper is the use of a pso algorithm for optimizing the contro...

in this paper, a complete model of an electro hydraulic driven dry clutch along with its performance evaluation has elucidated. through precision modeling, a complete nonlinear physical and full order sketch of clutch has drawn. ultimate nonlinearities existent in the system prohibits it from being controlled by conventional linear control algorithms and to compensate the behavior of the system...

Conducting polymer-based micro-actuators are of great interest in soft MEMS as they exhibit large strains and forces response to electrical stimulation. To date, these have very often been characterized by applying low frequency voltage extract the electromechanical characteristics. However, many applications require maintaining actuator’s position for several minutes. A micro-camera tracking d...

Metallic electrochemical actuators convert electrical energy into mechanical via charge-induced strain at the nanoporous metal/electrolyte interface. To enhance actuation amplitude, a general choice is to increase electrode surface area elevate charge capacity. However, large detrimental stability and strength of actuator, such as irreversible volume shrinkage due coarsening. Here, this critica...

This paper describes the development of a new piezohydraulic actuator for broadband microjet flow control applications. The actuator utilizes a lead zirconate titanate (PZT) stack actuator and a hydraulic amplification design to achieve relatively large displacements in a compact actuator to control flow through a microjet orifice. Displacement amplification of 81 times the stack actuator displ...

• Crack detection of turbine blades with vibrothermography techniques. New procedure understanding crack topology and the prediction preloads in cracks. Numerical analysis for optimising blade excitation. The hot gas components a have to withstand extreme loads. As failure could catastrophic consequences, integrity entire engine must always be guaranteed, hence quick reliable structural health ...

Smart actuators that can convert external energy stimuli into mechanical output have great potential in industrial, biomedical, and military applications. However, the existed disadvantage such as complex fabrication process, single stimulus source, requirement of artificial restrict their further development. Herein, a MXene/polyethylene (PE)-based soft actuator with multistimulus response abi...

Recently, the intelligent services demands interactions with the sensor networks, actuator networks, and context aware applications. Actuator network supports an infrastructure to have an immediate access to information for controlling the physical world and its objects using sensor networks and context aware applications. Actuator network middleware supports the command message transfer for co...