Article
Automation & Control Systems
Chen Zhang, Yewei Yu, Miaolei Zhou
Summary: This study considers the problem of finite-time adaptive output feedback quantized control for nonstrict-feedback nonlinear systems with unknown hysteresis and time delays. An estimated inverse compensator (EIC) is constructed to compensate for the hysteresis, while a Lyapunov-Krasovskii functional is used to handle the uncertainties of time delays. However, applying the quantized signal directly to the hysteretic system leads to degraded system performance. To overcome this issue, a new composite quantizer is proposed, which consists of an adaptive state-estimation filter and a modified hysteretic quantizer. The former facilitates state approximation by incorporating feedback information, while the latter regulates the communication rate. With the proposed EIC-FPAQC scheme, the closed-loop systems achieve semiglobal practical finite-time stability, and the tracking error can be guaranteed within a predefined accuracy. Experimental results on a piezoelectric-driven micropositioning stage demonstrate the effectiveness of the proposed method.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Mechanical
Linlin Nie, Yiling Luo, Wei Gao, Miaolei Zhou
Summary: This study investigates the hysteresis characteristics and the effects of excitation frequency on hysteresis behaviors in piezoelectric micropositioning stages. It develops a rate-dependent asymmetric hysteresis Prandtl-Ishlinskii (RDAPI) model and a corresponding robust adaptive control strategy, which outperforms other methods in terms of tracking performance and accuracy.
NONLINEAR DYNAMICS
(2022)
Article
Automation & Control Systems
Wei Wei, Zhiyuan Zhang, Min Zuo
Summary: Hysteresis affects the accuracy of a piezoelectric nanopositioning system, leading to difficulties in maintaining satisfactory performance with inverse hysteresis model-based control. Linear active disturbance rejection control (LADRC) is a practical approach, but the phase lag of total disturbance estimation impacts its ability. By introducing a phase-leading extended state observer (PLESO), the system can compensate for total disturbance in a more timely manner, improving positioning accuracy.
Article
Automation & Control Systems
Xiuyu Zhang, Yuehang Liu, Xinkai Chen, Zhi Li, Chun-Yi Su
Summary: This article proposes an adaptive pseudoinverse control scheme based on fuzzy logic system (FLS) and barrier Lyapunov function (BLF) for a class of state-constrained hysteretic nonlinear systems. The hysteresis nonlinearity in the actuators is considered and mitigated by the proposed pseudoinverse control algorithms. The all-state-constrained control problem of the Preisach hysteresis model is overcome with the aid of an FLS, BLFs, and the proposed hysteresis pseudoinverse algorithms.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Engineering, Electrical & Electronic
Chenkun Qi, Jianfeng Lin, Yuze Wu, Feng Gao
Summary: The study introduces a Wiener model identification method for piezoelectric actuators, which can jointly model linear and nonlinear dynamics. Experimental results demonstrate that this method can effectively model the creep, vibration, and hysteresis dynamics of piezoelectric actuators.
IEEE SENSORS JOURNAL
(2021)
Article
Computer Science, Artificial Intelligence
Huanqing Wang, Liya Shen
Summary: This article investigates the problem of adaptive fuzzy fixed-time control for a class of nonlinear systems subject to time-varying full-state constraints and actuator hysteresis. The fuzzy logic systems (FLSs) are employed to approximate the unknown nonlinear dynamics. A tan-type nonlinear mapping (NM) approach is used to solve the control problem of nonlinear systems with full-state constraints. The actuator hysteresis nonlinearities are expressed by differential equations with unknown parameters and combining the adaptive backstepping control technique with the fixed-time stability theory, an adaptive fuzzy fixed-time control method is presented. The proposed control scheme can guarantee the boundedness of all signals in the closed-loop system without violating the state constraints, and the output can accurately track the desired signals in a fixed time. Finally, the feasibility of the presented algorithm is verified by simulation results.
IEEE TRANSACTIONS ON FUZZY SYSTEMS
(2023)
Article
Automation & Control Systems
Yanding Qin, Heng Duan, Jianda Han
Summary: This article proposes an adaptive hysteresis compensation method that combines the direct inverse modeling (DIM) method and an adaptive Kalman filter (AKF) to improve the performance and bandwidth of the closed-loop system by eliminating the hysteresis of the piezoelectric actuator in fast scanning or tracking.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Instruments & Instrumentation
Keping Liu, Shuai Yu, Zhenguo Zhang, Piao Fan, Tinghai Cheng, Xiaohui Lu
Summary: In this paper, a composite control strategy combining stepping and scanning modes is proposed to overcome the difficulties in achieving nanopositioning over large travel and the negative effects of hysteresis characteristics and external disturbances. An integral back-stepping linear active disturbance rejection control (IB-LADRC) strategy is introduced in the scanning mode, which uses a linear extended state observer to estimate displacement, velocity, and total disturbance in real time. Simulation and experimental results demonstrate that the IB-LADRC algorithm effectively improves the positioning accuracy of the PSSNS system.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Multidisciplinary Sciences
Huan Feng, Hongbo Zhou, Congmei Jiang, Aiping Pang
Summary: This paper proposes a structured H∞ design to address the issues of accuracy and robustness caused by the weakly damped resonant modes and model uncertainty in a piezoelectric nanopositioning platform. A two-loop control structure is used, with an H∞ optimization matrix containing multi-dimensional performance decoupling outputs and an inner damping controller set according to the resonant modes' damping. Simulation experiments demonstrate that the designed structured H∞ controller achieves higher tracking accuracy and robustness compared to other controllers, meeting multiple performance requirements and showing suitability for engineering practice applications.
Article
Engineering, Electrical & Electronic
Eric Tan Kai Chiang, Tomoaki Mashimo
Summary: In millimeter-scale ultrasonic motors, the choice between bending and three-wave vibration modes depends on the length of the stator. The bending mode is advantageous for longer stators (2 mm), while using the three-wave mode performs higher efficiency on shorter stators (1 mm).
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Mathematics
Cristian Napole, Oscar Barambones, Mohamed Derbeli, Isidro Calvo, Mohammed Yousri Silaa, Javier Velasco
Summary: Piezoelectric actuators are widely used for applications requiring high-precision performance, but their positioning accuracy is affected by hysteresis. This study enhances tracking accuracy of a commercial PEA stack actuator through a novel approach combining STA and ANN, showing significant error reduction compared to PID controller in experimental results.
Article
Instruments & Instrumentation
Marc Savoie, Jinjun Shan
Summary: In this paper, a temperature-dependent asymmetric Prandtl-Ishlinskii (TAPI) model is developed to capture the changes in hysteresis curves of a piezoelectric actuator (PEA) with respect to temperature. The proposed model incorporates nonlinearities, asymmetry, and temperature dependence, and simplifies model inversion and parameter determination. Experimental verification and compensator design demonstrate the effectiveness of the TAPI model in linearizing the PEA output throughout the temperature range.
SMART MATERIALS AND STRUCTURES
(2022)
Article
Engineering, Mechanical
Sicheng Yi, Quan Zhang, Xiaoqing Sun, Bintang Yang, Guang Meng
Summary: This paper presents a hybrid adaptive feedforward and feedback controller with hysteresis compensator for a magnetostrictive-actuated multi degree of freedom positioning and vibration isolation integrated system. The controller effectively addresses the issues of cross-coupling, strut hysteresis, and dynamics by decoupling the spatial motion and utilizing adaptive finite impulse response filter and proportional-integral-derivative feedback controller. Experimental studies demonstrate that the proposed controller outperforms other controllers in terms of positioning and vibration isolation.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Engineering, Electrical & Electronic
Chen Yang, Jie Zhao, Bing-Feng Ju
Summary: This paper proposes a novel charge controller that integrates a hysteresis disturbance observer to overcome the limitations of hysteresis on tracking performance in piezo-actuators. By reconstructing the control signal and using a diode-based stabilization scheme, the controller achieves improved tracking performance and a wider operating bandwidth. This design has broad implications for applications such as precision positioning systems, nanopositioning devices, and scanning probe microscopy.
IEEE SENSORS JOURNAL
(2023)
Article
Instruments & Instrumentation
Mingxiang Ling, Shilei Wu, Zhihong Luo, Liguo Chen, Tao Huang
Summary: This paper proposes a new electro-mechanical dynamic stiffness matrix of piezoelectric stacks for systematic analysis, which enables the full acquisition of parameters such as the time-domain response of piezoelectric hysteresis and the dynamic resonance behavior of compliant mechanisms.
SMART MATERIALS AND STRUCTURES
(2023)
Article
Automation & Control Systems
Sameh Abd-Elhaleem, Mohamed Soliman, Mohamed Hamdy
Summary: This paper investigates the disturbance rejection and periodic signal tracking problems for linear systems with unknown exogenous disturbances under limited communication resources. The proposed scheme combines the EID estimator with the MRC to achieve periodic reference tracking and enhance disturbance rejection performance. Additionally, a PETFO is introduced to reduce computational burden and save communication resources, with stability ensured using LMIs.
INTERNATIONAL JOURNAL OF CONTROL
(2022)
Article
Computer Science, Artificial Intelligence
Salah Helmy, Mohamed Magdy, Mohamed Hamdy
Summary: The study proposed an adaptive intuitionistic neuro-fuzzy control scheme for synchronization between chaotic systems, demonstrating its effectiveness against external disturbances and model uncertainties through experimental results.
COMPLEX & INTELLIGENT SYSTEMS
(2022)
Article
Oncology
Mohamed Hamdy, Amr Shafik, Emad Shash, Khaled Kamal, Basel Refky
INTERNATIONAL JOURNAL OF GYNECOLOGICAL CANCER
(2022)
Article
Biochemical Research Methods
Mohamed M. A. Hamdy, Mohamed A. Korany, Shaza A. Ebied, Rim S. Haggag
Summary: This study analyzed binary mixtures of novel oral anticoagulants and lipid lowering statins using HPLC-DAD method. The method was suitable for quantitative assay of the mixtures in tablets and human plasma, and could separate possible degradation products. This analysis is important for clinical monitoring of cardiovascular patients.
JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES
(2022)
Article
Chemistry, Physical
Peipei Wei, Jie Liang, Qian Liu, Lisi Xie, Xin Tong, Yuchun Ren, Tingshuai Li, Yongsong Luo, Na Li, Bo Tang, Abdullah M. Asiri, Mohamed S. Hamdy, Qingquan Kong, Zhiming Wang, Xuping Sun
Summary: In this study, Fe-doped Co3O4 nanoarray is reported to efficiently catalyze NO3RR for NH3 production in neutral conditions, achieving high yield and Faradaic efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Correction
Computer Science, Artificial Intelligence
Sameh Abd-Elhaleem, Mohamed Soliman, Mohamed Hamdy
Article
Chemistry, Physical
Asif Hayat, Muhammad Sohail, Mohamed S. Hamdy, T. A. Taha, Huda Salem AlSalem, Asma M. Alenad, Mohammed A. Amin, Rahim Shah, Arkom Palamanit, Javid Khan, W. Nawawi, Sunil Kumar Baburao Mane
Summary: This article summarizes the research progress and applications of semiconductor-based boron nitride (BN) and its composites. BN has multiple advantages, making it potentially useful in energy, environmental, and pharmaceutical fields. The various synthesis routes for BN and its composites are discussed, along with their applications in photocatalysis, drug delivery, and sensors, as well as the challenges faced.
SURFACES AND INTERFACES
(2022)
Article
Energy & Fuels
Hisham M. Soliman, Ashraf Saleem, Ehab H. E. Bayoumi, Michele De Santis
Summary: This paper presents a stable controlled active power filter design using an invariant-ellipsoid set to minimize total harmonic distortion (THD) while injecting current into a large grid. The nonlinear load current is considered as an external disturbance, and the grid is modeled as a fixed voltage source with varying Thevenin impedance. By minimizing the volume of the ellipsoid, the effect of disturbance on system performance is reduced and the trajectories are kept close to the origin. The design is formulated as a set of nonlinear matrix inequalities and solved iteratively using linear matrix inequalities. Simulation and experimental results demonstrate the effectiveness of the proposed design in reducing THD injected into the grid under uncertain grid impedance and variable loads.
Article
Automation & Control Systems
Sameh Abd-Elhaleem, Mohamed Soliman, Mohamed Hamdy
Summary: This article addresses the problems of disturbance rejection and periodic signal tracking for a certain class of time-varying delay nonlinear systems subjected to unknown exogenous disturbances. A Takagi-Sugeno (T-S) fuzzy model is used to approximate the nonlinearity of the system. The proposed modified repetitive controller (MRC) and adaptive periodic event triggered mechanism based fuzzy state observer (APETM-FSO) improve the performance of disturbances rejection and achieve good tracking performance for periodic references. Sufficient conditions based on the Lyapunov-Krasovskii functional stability theory and linear matrix inequalities (LMIs) are derived to achieve the asymptotic stability of the overall system. Simulation results are presented to demonstrate the effectiveness and feasibility of the proposed scheme.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Engineering, Electrical & Electronic
Mostefa Mesbah, Muhammad Shafiq, Ashraf Saleem, Hassan Yousef, Hisham Soliman
Summary: To overcome the limitations of hysteresis and other nonlinearities in piezoelectric materials, this paper proposes a novel model-free learning-based controller for high position tracking performance.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2023)
Article
Computer Science, Information Systems
Ashraf Saleem, Sidike Paheding, Nathir Rawashdeh, Ali Awad, Navjot Kaur
Summary: This paper presents an evaluation of common underwater image enhancement techniques using a new publicly-available dataset. The dataset consists of 85 images of aquatic plants taken at a shallow depth from three different locations in Lake Superior, USA. Nine state-of-the-art image enhancement models are benchmarked using this dataset, and their performance at different depths is analyzed and compared.
Article
Engineering, Electrical & Electronic
Mohamed Hamdy, Amal Ibrahim, Belal Abozalam, Salah Helmy
Summary: Maximum power point tracking (MPPT) is a technique used in photovoltaic (PV) arrays to optimize their energy generation in varying weather conditions. The article proposes a new fuzzy logic algorithm, Type-3 fuzzy logic (T3FL), which improves tracking efficiency and speed by better dealing with uncertainties. Simulation and experimental studies demonstrate the effectiveness of the T3FL algorithm.
ELECTRIC POWER COMPONENTS AND SYSTEMS
(2023)
Article
Acoustics
Muhammad Shafiq, Israr Ahmad
Summary: This article proposes a novel robust adaptive synchronization control technique for attitude synchronization of two identical three-dimensional chaotic satellite systems. The controller achieves smooth error vector convergence and robust performance. Theoretical findings are verified through computer simulation results-based analysis and a comparative study, and the saturation effects of control effort are discussed.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Computer Science, Information Systems
Muhammad Shafiq, Israr Ahmad, Bashir Naderi
Summary: This research proposes a novel adaptive robust control strategy for synchronizing chaotic systems. The control strategy achieves faster and smoother convergence of the synchronization error vector to zero and compensates for unknown exogenous disturbances. Computer simulations confirm the effectiveness of the proposed control technique and show its superior performance compared to other feedback controllers. The strategy is applied to encrypt and decrypt messages in secure communication systems.
