A5102837818- Vibration Control and Rheological Fluids
- Structural Health Monitoring Techniques
- Structural Engineering and Vibration Analysis
- Innovative Energy Harvesting Technologies
- Geophysics and Sensor Technology
- Soft Robotics and Applications
- Advanced Sensor and Energy Harvesting Materials
- Elevator Systems and Control
- Energy Harvesting in Wireless Networks
- Hydraulic and Pneumatic Systems
- Seismic Performance and Analysis
- Railway Engineering and Dynamics
- Dielectric materials and actuators
- Inertial Sensor and Navigation
- Conducting polymers and applications
- Organic Electronics and Photovoltaics
- Wireless Power Transfer Systems
- Seismic Waves and Analysis
- Vibration and Dynamic Analysis
- Magnetic Bearings and Levitation Dynamics
- Digital Filter Design and Implementation
- Prosthetics and Rehabilitation Robotics
- Advanced Control Systems Design
- Acoustic Wave Resonator Technologies
- Control and Dynamics of Mobile Robots
Shanghai University
2020-2024
Tongji University
2020-2022
Huazhong University of Science and Technology
2018
In this Letter, we propose fractal-based piezoelectric energy harvesters (PEHs) for broadband scavenging. The introduction of fractal topology into transducers significantly alleviates the inherent limitation a narrow working bandwidth in commonly used cantilever PEHs. We conduct finite element analysis and experiments to exploit performance PEHs with different iteration times. Our findings reveal that higher-order structures generate an increased number eigenfrequencies as well modal...
The low-frequency performance of active vibration isolation system depends on the measurement ability inertial sensor such as geophone. Bandwidth extension-based methods may serve a cost-effective solution to increase accuracy geophone, but suffered deteriorations noise. Traditionally, available extension bandwidth geophone is merely based measured noise level or dynamic, which result in degraded due geophone's over- undercompensation. In this paper, an integrated approach hybrid controller...
The traditional electrostatic layer jamming (ELJ) utilizes air as the dielectric, which leads to ELJ system that can withstand less voltage. A novel based on giant electrorheological fluid (ELJ-GERF) for soft robotics is proposed in this paper. principle of ELJ-GERF use attraction squeeze flexible planar electrodes generate friction and then engage jamming, where GERF acts dielectric. Three specimens variable tensile stiffness applications, namely ELJ-GERF, ELJ-AIR, ELJ-OIL, are fabricated...
Smart materials, such as electrorheological (ER) and magnetorheological (MR) fluids, have been proven to be tuneable in terms of their mechanical properties valuable the application vibration suppression. However, MR fluid has disadvantages sedimentation particles complexity magnetic field design. ER is also difficult apply for practical uses due limitation yield stress. Giant (GER) represented a large break-through stress with ability improve performance properties. This advance facilitates...
This article presents a novel electromagnetic variable stiffness isolator that achieves bidirectional regulation, which means the experiences reduced when applied current is positive and an increased opposite applied. In addition, variations are equal for two currents with same magnitude but polarities. The proposed can not only ensure vibration isolation performance in working frequency zone relatively far from natural frequency, also realize high-damping-like effect shock response...
With the improvement of performance optical equipment carried by on-orbit spacecraft, requirements vibration isolation are increasing. Passive platforms widely used, but ability to suppress low-frequency deterministic disturbance is limited, especially near system’s natural frequency. Therefore, an active control strategy proposed improve passive performance. In this paper, a Youla parameterized adaptive system introduced piezo-actuated active–passive structure. A linear quadratic Gaussian...
Abstract As a typical smart material, giant electrorheological fluid (GERF) has greater yield stress than for vibration isolation. However, as rheological the modeling precision is severely degraded by its innate rate-dependent hysteretic nonlinearity and uncertainty. In this paper, novel control method proposed, which requires little information about damper based on GERF. The proposed combines nonlinear fractional-order (FC) extended state observer (ESO) constructing second-order...
Abstract Soft grippers exhibit good adaptability, but their grasping performance is limited. Variable-stiffness technology has been applied to soft address this problem. Therefore, a variable bending stiffness module (VBSM) with electrostatic layer jamming based on giant electrorheological fluid (ELJ-GERF) for robots proposed in study, which exhibits faster response time and wider range of variation. A VBSM prototype fabricated, theoretical model established. The mainly affected by the...
In this paper, we propose a generator for piezoelectric energy harvesting from suspension structures. This device consists of leaf spring and eight pairs layers attached to inner outer surfaces. We present special type spring, which can magnify the force workload allow achieve larger deformation. The is solve problem vibration reutilization in low-frequency system. To verify efficiency proposed configuration, series experiments are operated. results indicate that resonance frequency (25.2...
2D materials with unique opto-electronic properties have shown immense potential for application in organic photovoltaics (OPVs). In this article, we reported a facile and efficient strategy to enhance the device performance of OPVs by doping material antimonene quantum sheets (AMQSs) into PEDOT:PSS emulsion. The interfacial between hole extraction layer (HEL) PBDB-T:ITIC-based active were properly meliorated, achieving boosted power conversion efficiency (PCE). Results indicate that...
A geophone usually behaves like a high-pass filter. The lower bound of its measuring bandwidth is often dependent on the dynamics interior mass-spring mechanical structure. Reducing stiffness spring could be an effective way to improve low-frequency performance geophone. Unfortunately, resultant system may produce nonlinear response and suffer stability problem. In this article, novel magnetic-suspended (MS) developed. It employs four well-designed concentric magnetic cylinders as <italic...