High-Performance Wireless Piezoelectric Sensor Network for Distributed Structural Health Monitoring by Shang Gao, Xuewu Dai, Zheng Liu, Guiyun Tian

“…Each node supports up to 8 PZT transducers, one of which works as the actuator generating the lamb-wave at an arbitrary frequency, while the responding vibrations at other PZT sensors are sensed simultaneously. …”
Get full text

Gust Load Alleviation including Geometric Nonlinearities Based on Dynamic Linearization of Structural ROM by Chao An, Chao Yang, Changchuan Xie, Yang Meng

“…For GLA analysis, a classic proportional-integral-derivative (PID) controller treats a servo as an actuator and acceleration as the feedback signal. Moreover, a wind tunnel test has been completed and the effectiveness of the control technology is validated. …”
Get full text

Tunable MEMS-based meta-absorbers for nondispersive infrared gas sensing applications by Kunye Li, Yuhao Liang, Yuxin Liu, Yu-Sheng Lin

“…Afterward, we propose a tunable meta-absorber integrated with a microelectromechanical system (MEMS)-based electrothermal actuator (ETA). By applying a direct current (DC) bias voltage, the inclination angle of the meta-absorber can be controlled, and the relationship between the inclination angle and the applied voltage can be deduced theoretically. …”
Get full text

L1 Adaptive Fault-Tolerant Attitude Tracking Control of UAV Systems Subject to Faults and Input Saturation by Yan Zhou, Huiying Liu, Huijuan Guo, Yongjian Chen

“…After the conversion and reorganization of such uncertainties including actuator faults, sensor faults, input saturation, and external disturbances, a nonlinear uncertain system model is developed. …”
Get full text

Active Vibration Control of Helicopter Maneuvering Flight Using Feedforward-Robust Hybrid Control Based on Reference Signal Reconstruction by Yifan Qin, Yang Lu, Jinchao Ma, Huiyu Yue

“…Further experiments of real-time free-free beam vibration control are performed, driven by a stacked piezoelectric actuator. The instantaneous overshoot of measured response is 42% less than the peak value and its attenuation reaches 85% within 2.5 s. …”
Get full text

Numerical and Experimental Stability Investigation of a Flexible Rotor on Two Different Tilting Pad Bearing Configurations by Weimin Wang, Qihang Li, Feng He, Paul Allaire

“…In this paper, the weighted instrumental variable (WIV) based system identification method for rotating machinery stability is investigated based on a sine sweep forward excitation with an electromagnetic actuator. The traditional multiple input multiple output (MIMO) frequency response function (FRF) is transformed into a directional frequency response function (dFRF). …”
Get full text

Sprawl Angle in Simplified Models of Vertical Climbing: Implications for Robots and Roaches by Goran A. Lynch, Lawrence Rome, Daniel E. Koditschek

“…For quadratic-in-velocity power output actuation models typical of commercially available electromechanical actuators, our results suggest the new hypothesis that sprawled posture may confer significant energetic advantage. …”
Get full text

Study on Electrical Parameter Matching of Piezoelectric Stack Periodic Strut for Helicopter Cabin Noise Control by Yue Hui-yu, Lu Yang, Dang Chong, Qin Yi-Fan, Ma Jin-chao, Zhu Tian-Yu

“…A three-period PSPS strut composed of piezoelectric stack actuator and PV strut is used for experimental research, and the matching of electrical parameters of this PSPS in the test is analyzed.…”
Get full text

Investigation of Structural Nonlinearity Effects on the Aeroelastic and Wake Characteristics of a 15 MW Wind Turbine by Zhenju Chuang, Lulin Xia, Yan Qu, Wenhua Li, Jiawen Li

“…This study presents a nonlinear aeroelastic model that accounts for large deformations of slender, flexible blades, coupled through the Actuator Line Method (ALM) and Geometrically Exact Beam Theory (GEBT). …”
Get full text

Online Structural Health Monitoring and Parameter Estimation for Vibrating Active Cantilever Beams Using Low-Priced Microcontrollers by Gergely Takács, Ján Vachálek, Boris Rohal’-Ilkiv

“…This paper presents a structural health monitoring and parameter estimation system for vibrating active cantilever beams using low-cost embedded computing hardware. The actuator input and the measured position are used in an augmented nonlinear model to observe the dynamic states and parameters of the beam by the continuous-discrete extended Kalman filter (EKF). …”
Get full text

In Vitro Model of Vascular Remodeling Under Microfluidic Perfusion by Kotaro Nishikata, Kimisato Doi, Nobuyoshi Kaneoya, Masataka Nakamura, Nobuyuki Futai

“…We developed a portable microfluidic system that combines spontaneous lumen formation from human umbilical endothelial cells (HUVECs) in fibrin–collagen hydrogels with active perfusion controlled by a braille actuator. Adaptive interstitial flow and feedthrough perfusion switching enabled the successful culture of spontaneously formed naturally branched lumens for more than one month. …”
Get full text

A Longitudinal-Bending Hybrid Linear Ultrasonic Motor and Its Driving Characteristic by Huajie Qu, Chendong Liu, Lei Zhang, Jianjun Qu, Baoyu Song

“…As a new type of driver, linear ultrasonic motor (LUSM) is widely used in the high-tech field because of its low speed, high thrust, low noise, and no electromagnetic interference. However, as an actuator used in microdevices, most of the existing LUSMs are large in size and not compact in structure. …”
Get full text

Modelling and Experimental Investigation of an Active Damper by Rafael Luís Teixeira, Francisco Paulo Lépore Neto, José Francisco Ribeiro

“…The size of the orifice is adjusted by a controlled linear piezoelectric actuator that positions the conical core into a conical cavity. …”
Get full text

Enhancing ride comfort of semi-active suspension through collaboration control using dung beetle optimizer optimized Fuzzy PID controller by Kunlun Zhang, Azizan As’arry, Liucun Zhu, Abdul Aziz Hairuddin, Mohd Khair Hassan, Mohd Zarhamdy Md Zain

“…The control parameters generated by fuzzy control are utilized as the initial values for DBO iteration to obtain the optimal solution, which is subsequently fed into the PID controller to regulate changes in the actuator’s magnetic field. Use MATLAB/Simulink to build a quarter semi-active suspension model with magnetorheological (MR) dampers for simulation analysis. …”
Get full text

A Fast Testing Method to Objectively Quantify the Stiffness of Stability Boots by Simon Bürgi, Judith Roost, Marco R. Hitz, Peter Schwilch, William R. Taylor, Silvio Lorenzetti

“…Six different stability boots were tested in a novel device that allowed body weight to be taken into account using a pneumatic actuator. The fixation of the boots was controlled using two air pad pressure sensors. …”
Get full text

An interactive soft robotic hand-task training system with wireless task boards and daily objects on post-stroke rehabilitation by Xiangqian Shi, Chengyu Yang, Pak Chung Lee, Disheng Xie, Zhongping Ye, Zheng Li, Raymond Kai-yu Tong

“…Individually controlled finger actuators assist stroke patients during various grasping tasks. …”
Get full text

Design and implementation of electric vehicle with autonomous motion and steering control system using single board computer and sensors by Zuber Basha Shaik, Samineni Peddakrishna

“…However, the integration of modern sensors and controllers and actuator mechanisms remains a significant challenge to achieving autonomous functionality in EVs. …”
Get full text

Exceptionally high work density of a ferroelectric dynamic organic crystal around room temperature by Durga Prasad Karothu, Rodrigo Ferreira, Ghada Dushaq, Ejaz Ahmed, Luca Catalano, Jad Mahmoud Halabi, Zainab Alhaddad, Ibrahim Tahir, Liang Li, Sharmarke Mohamed, Mahmoud Rasras, Panče Naumov

“…When transitioning at 295–305 K on heating and at 265–275 K on cooling the ferroelectric crystals of guanidinium nitrate exert a linear stroke of 51%, the highest value observed with a reversible operation of an organic single crystal actuator. Their maximum force density is higher than electric cylinders, ceramic piezoactuators, and electrostatic actuators, and their work capacity is close to that of thermal actuators. …”
Get full text

Hardware-in-the-loop controller testing and visualization of an industrial gantry by M. Leao Moreira, R. Singh, A. Gomez-Badillo, B. Albakri, V. Venugopal, Y. Park, S. Cetin

“…Motion data from the model can be used to optimize the actuator controller, make physical design assessments, and predict possible failure scenarios such as software/hardware malfunctions. …”
Get full text

3D ophthalmic ultrasonography at the slit lamp using existing ultrasound systems. by Jack O Thomas, Josiah K To, Parsa Riazi Esfahani, Frithjof Kruggel, William C Tang, Andrew W Browne

“…<h4>Methods</h4>A custom system was designed for mounting a linear actuator to a slit lamp and enabling the horizontal actuation of any ultrasound probe. …”
Get full text