Article
Engineering, Electrical & Electronic
Andrius Ceponis, Dalius Mazeika, Piotr Vasiljev, Regimantas Bareikis
Summary: The paper presents a study on a 5-DOF piezoelectric robot used for positioning optical devices and systems. The robot consists of a cone-shaped stator, two piezoelectric rings, and alumina oxide contacts. By exciting the piezoelectric rings using a saw-tooth waveform electric signal, precise planar or angular motion of the rotor can be achieved. Numerical investigations and experiments confirm that angular and planar motion of the load can be generated using specific vibration modes. The prototype of the robot achieves a maximum rotation speed of 21.1 RPM and a planar speed of 30.12 mm/s.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Engineering, Mechanical
Yi-Hsuan Lin, Chien-Sheng Liu, Chiu-Nung Yeh
Summary: A novel 3-DOF spherical voice coil motor was proposed to address the efficiency, volume, and positioning issues in multi-DOF motion of robot eyes and joints. The motor utilizes a combination of coils and a ring magnet to generate Lorentz force for motion, with the ability to achieve 360 degrees rotation about the Z-axis. Simulation results using ANSYS show improved power efficiency by powering only specific combinations of coils, demonstrating the feasibility of the proposed VCM.
Article
Engineering, Mechanical
Chien-Sheng Liu, Yu-Cheng Wu, Yu-Jie Lan
Summary: This paper proposes a method to reduce laser fluctuations by combining 4-DOF VCM with a DC brushed motor and controlling the laser direction for compensation using a laboratory-designed mirror set. The feasibility of this method was verified using CAD software and finite element analysis software, and a mathematical model was used for simulation.
Article
Education, Scientific Disciplines
Zheng Li, Liang Zhao, Peng Guo, Zhe Wang
Summary: This paper proposes a new research method for studying the contact state of hybrid drive multi-degree-of-freedom motors. Various models are obtained through analytical methods, and a friction interface model is established. The friction distribution diagram is obtained using Matlab software.
Article
Instruments & Instrumentation
Anti Zhang, Liang Wang, Jiamei Jin, Di Chen, Rui Liu, Heng Zhao
Summary: This study proposes and investigates a piezoelectric actuated underwater mechanical manipulator joint, which achieves 2-DoF rotation through the inverse piezoelectric effect of the piezoelectric actuator. The joint features a simpler, more compact, lightweight design and can achieve fine manipulation.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Instruments & Instrumentation
Jianxing Li, Shijing Zhang, Yingxiang Liu, Jie Deng, Xuefeng Ma
Summary: An inertial impact locomotion robot (IILR) driven by piezoelectric bimorph actuators (PBAs) was developed for plane locomotion with multiple degrees of freedom. A simplified dynamic model and a prototype were established and tested to evaluate the robot's performance. The results showed that the IILR had a large carrying capability, multiple degrees of freedom, and no electromagnetic interference, making it suitable for precision positioning and carrying applications.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Shijing Zhang, Yingxiang Liu, Jie Deng, Xinqi Tian, Xiang Gao
Summary: A new two-DOF inertial rotary motor using a two-dimensional piezoelectric actuator with stick-slip mechanism was developed, achieving high rotary velocities and resolution. It held the advantages of smaller size and larger output speed, suitable for precision attitude adjustment systems.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2021)
Article
Robotics
Boyu Zhang, Penghui Yang, Xiangming Gu, Hongen Liao
Summary: The research team developed a laser endoscopic manipulator with a soft bendable tip, aiming to enhance the operability of surgeries. Experimental results show that this manipulator has extended bending capability and integrated diagnosis and therapeutic function, enabling on-site therapy.
IEEE ROBOTICS AND AUTOMATION LETTERS
(2021)
Article
Mechanics
Yinan Jin, Prashant K. K. Jamwal, Roland Goecke, Mergen H. H. Ghayesh, Shahid Hussain
Summary: Robot-assisted rehabilitation is a rapidly advancing field that uses robotic devices to treat disabilities. The design and actuation of these devices are crucial for effective treatment, as non-ergonomic designs can cause discomfort and further gait disorders. This article introduces a new gait robot design that addresses these issues by incorporating intrinsically compliant actuators and increased degrees of freedom. The design ensures alignment with human anatomical joints and allows for natural walking dynamics. The robot firmware is optimized using adaptive neuro-fuzzy inference system to improve computational efficiency. The design is validated for gait rehabilitation using a fuzzy logic controller and evaluating joint profiles.
MECHANICS BASED DESIGN OF STRUCTURES AND MACHINES
(2023)
Article
Engineering, Multidisciplinary
Wenjie Tian, Min Xu, Xiangpeng Zhang, Xu Guo, Lina Wang, Tian Huang
Summary: This paper presents an efficient method for global repeatability prediction of a 6-DOF hybrid polishing robot based on the equivalent error model of actuated joint. The proposed method establishes the mapping relationship between actuated joint equivalent repeatability errors and configuration using power polynomials. The experiments on a prototype verify the reliability of the method, with an average change rate of 8.73% between the predicted and real pose repeatability.
Article
Engineering, Multidisciplinary
Siming Cao, Qunlin Cheng, Yingjie Guo, Weidong Zhu, Haijin Wang, Yinglin Ke
Summary: This paper presents a pose error compensation method carried out in joint space to enhance the accuracy of both position and orientation in industrial robots. By dividing the joint space and constructing spatial databases, the pose errors are compensated using spatial interpolation and transformation error matrices. Experimental results demonstrate that this method can significantly reduce the position and orientation errors of the robot.
PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY
(2022)
Article
Instruments & Instrumentation
Cheng Gong, Yong Kou, Ke Jin
Summary: In this paper, the dynamic behavior of space manipulators with smart giant magnetostrictive material (GMM) joints is studied. A nonlinear dynamic model considering the magneto-thermal-mechanical coupling for the manipulator is established, and an experiment is conducted to evaluate the performance of the GMM joint. It is found that manipulators with the GMM joint have better performance compared to the PMSM joint, including larger output torque, faster settling time, and wider temperature adaptation range. These essential investigations will greatly benefit the applications of space manipulators.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Automation & Control Systems
Saad Jamshed Abbasi, Hamza Khan, Min Cheol Lee
Summary: In this study, two different control logics, sliding mode control with a sliding perturbation observer (SMCSPO) and integral sliding mode control (ISMC), have been designed for the position control of a robot with five degrees of freedom (DOFs). Both control schemes have been implemented in MATLAB/Simulink, and it has been observed that the ISMC controller has improved the tracking performance of the system.
INTERNATIONAL JOURNAL OF CONTROL AUTOMATION AND SYSTEMS
(2021)
Article
Engineering, Mechanical
Jingang Jiang, Qiyun Tan, Tianhua He, Jianpeng Sun, Jiawei Zhang
Summary: In this study, a parallel lifting actuator is designed to address the safety issues in stereo garage technology and its effectiveness is verified. The experimental results demonstrate that the parallel lifting mechanism can alleviate the parking difficulty problem.
Article
Computer Science, Interdisciplinary Applications
Zhiheng Liu, Ruifeng Li, Lijun Zhao, Yi Xia, Zhonghao Qin, Kui Zhu
Summary: This paper proposes an automatic joint motion planning method for a nine-axis industrial robot to achieve the shortest processing time in wheel hub polishing. First, offline programming is used to generate paths for the complex surface. Then, an improved Douglas-Peucker (DP) algorithm is proposed to reduce the number of machining path points. Next, the Greedy Best First Search (GBFS) and Sine cosine algorithm (SCA) are combined to efficiently find the optimal joint motion. Finally, the method is validated in both simulation and real environments based on the hub surface.
ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING
(2023)
Article
Acoustics
Shuyuan Li, Jingyao Shi, Xiaofeng Zhang
Summary: This paper obtains the expansion coefficients of the off-axial Gaussian beam and derives the three-dimensional acoustic radiation force of a sphere in the beam. The effects of the sphere's position on the transverse and axial acoustic radiation forces are studied, and numerical simulations validate the analytical theory. The study provides insights into particle manipulation using a Gaussian beam.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Physics, Applied
Takaki Kiyozumi, Tomoya Miyamae, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno
Summary: In this study, a super-simplified configuration of OCDR, consisting of only a light source and a photodetector, was developed. It was experimentally shown that this system can still perform distributed reflectivity sensing with a moderate signal-to-noise ratio, which will enhance the portability and cost efficiency of the OCDR technology.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno
Summary: In this study, a new scheme for polarization-sensitive distributed fiber-optic sensing called polarization optical correlation-domain reflectometry (POCDR) is proposed and its fundamental operations are experimentally demonstrated. The scheme controls the states of polarization (SOPs) of reference lights using a calibration method to eliminate the effect of unknown birefringence in the fibers. The experiments validate the feasibility and accuracy of this scheme.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2022)
Article
Optics
Takahiro Arika, Kentaro Nakamura
Summary: With the development of optical fiber distributed acoustic sensors (DAS), seismic observation using DAS has become popular. In this study, we conducted DAS measurements using dark fiber of an ocean bottom cable seismic and tsunami observation system, and explored a new seismic detection method using a convolutional neural network. The method treated the frequency wavenumber spectrum of strain rate as an image and effectively captured seismic waves even with low signal-to-noise ratio data.
Article
Physics, Applied
Guangtao Zhu, Tomoya Miyamae, Hiroshi Takahashi, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno
Summary: In this study, we investigate the distorted noise floor in simplified optical correlation-domain reflectometry (OCDR) without the use of an electrical spectrum analyzer (ESA). We experimentally analyze the noise floor and identify its origin, and demonstrate that it can be compensated using appropriate filtering. With this compensation, distributed reflectivity measurement over a 1.1 km long sensing fiber is successfully performed at a repetition rate of 100 Hz.
APPLIED PHYSICS EXPRESS
(2023)
Article
Physics, Applied
Kohei Noda, Heeyoung Lee, Shunsuke Watanabe, Kentaro Nakamura, Yosuke Mizuno
Summary: This study characterizes fiber gratings inscribed line-by-line in perfluorinated graded-index polymer optical fibers (PFGI-POFs) for tactile sensing. It is found that the spectral power of wideband transmitted light significantly depends on the object position, which is caused by light scattering at the fiber grating. Therefore, PFGI-POF gratings have the potential to be used in simple low-cost tactile sensors or high-sensitivity short-range displacement sensors without the need for additional supportive tools.
APPLIED PHYSICS EXPRESS
(2022)
Article
Physics, Applied
Kun Wang, Yuji Wada, Kentaro Nakamura
Summary: Through numerical and experimental studies, we found that tube hardness affects the directivity of the generated photoacoustic signal. Acoustic resonance modes were efficiently excited in a glass capillary, resulting in clear directivity of the photoacoustic signals. However, little resonance was stimulated in a silicone tube due to the acoustic impedance matching, leading to weak confinement of acoustic waves. These results suggest the possibility of characterizing the physical properties of thin tubes through the directivity of the photoacoustic signals.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Haruki Sasage, Mana Sakamoto, Kohei Noda, Kentaro Nakamura, Yosuke Mizuno, Heeyoung Lee
Summary: A cost-effective method is developed for estimating the whole sensing fiber's Brillouin frequency shift (BFS) without using an electrical spectrum analyzer. The Brillouin gain spectrum is down-converted and low-pass-filtered, and the total transmitted power is utilized to estimate the BFS. Experimental results demonstrate that the strain dynamic range of this method is double that of a conventional slope-assisted method.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Yosuke Mizuno, Naoki Motoishi, Kohei Noda, Antreas Theodosiou, Kyriacos Kalli, Heeyoung Lee, Kentaro Nakamura, Marcelo A. Soto
Summary: We show that fiber Bragg gratings in polymer optical fibers can generate reflection peaks in any wavelength range by exciting high-order propagation modes, thus improving the design of sensing systems for specific applications.
APPLIED PHYSICS EXPRESS
(2023)
Article
Physics, Applied
Tomoya Miyamae, Guangtao Zhu, Takaki Kiyozumi, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno
Summary: We propose a method for measuring optical fiber transmission loss using simplified optical correlation-domain reflectometry. By deliberately reducing the system's spatial resolution, we successfully observe the Rayleigh scattered signal without the use of a frequency shifter. Using this method, we are able to simultaneously measure the transmission loss, location, and loss of faulty connections along a 10 km fiber through distributed reflected-power measurements of Rayleigh scattering and Fresnel reflection.
APPLIED PHYSICS EXPRESS
(2023)
Article
Physics, Applied
Yuji Wada, Kentaro Nakamura
Summary: This study proposes a method for achieving uniform vibration of vibrating tools through topology optimization. By controlling the material distribution, the desired objective of maximizing the amplitude of a specific target point in phase with the input is achieved. The optimization is performed using a commonly used density model, resulting in a vibration distribution with an aligned phase on the output surface.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Acoustics
Shuyuan Li, Xiaofeng Zhang
Summary: The expressions of axial and transverse acoustic radiation forces of a rigid sphere in a zero-order Mathieu beam are derived. The addition theorem of Bessel functions is used to obtain the expansion coefficients of the off-axis beam, and numerical experiments are conducted to validate the theory. The study investigates the three-dimensional acoustic radiation forces on a rigid sphere with different beam parameters, showing that the axial forces are always positive while the transverse forces vary. By adjusting the frequency, half-cone angle, and offset of the beam, the value and direction of transverse forces can be controlled for particle manipulation. Additionally, a finite element model is used to verify the theoretical model, with good agreement between the two methods. This work contributes to a better understanding of particle manipulation with acoustic beams.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Nanoscience & Nanotechnology
Shuyuan Li, Xiaofeng Zhang
Summary: Expressions are derived to calculate the three-dimensional acoustic radiation force on a multilayer microsphere. A theoretical model is established to study the influence of particle geometry and position on the force. The results match well with numerical simulations. This study provides a theoretical foundation for manipulating a three-layer microsphere in a Gaussian beam.
NANOTECHNOLOGY AND PRECISION ENGINEERING
(2023)
Article
Physics, Applied
Seiga Ochi, Kouta Ozaki, Kohei Noda, Heeyoung Lee, Kentaro Nakamura, Yosuke Mizuno
Summary: We investigate the impact of modulation amplitude and frequency on the spatial resolution of direct-modulation Brillouin optical correlation-domain reflectometry (BOCDR). Our findings show that optimal resolution improvement can be achieved by initially increasing the modulation amplitude, followed by modulation frequency adjustment. These insights provide a basic guideline for enhancing spatial resolution in direct-modulation BOCDR.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Physics, Applied
Yukihiro Suzuki, Heeyoung Lee, Haruki Sasage, Kohei Noda, Kentaro Nakamura, Yosuke Mizuno
Summary: This paper presents a new configuration of distributed strain and temperature sensing technology called double-slope-assisted Brillouin optical correlation-domain reflectometry. Its loss-independent operation is demonstrated through simplified simulation and proof-of-concept experiments using a standard silica single-mode fiber.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
