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Journal articles on the topic 'Servo task'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Yu, Sui Ran, and Yun Wei Lu. "Design Task Decomposition in the Servo Press." Applied Mechanics and Materials 34-35 (October 2010): 1966–72. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1966.

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This research is to find a design method for the large scale and complex product system. Thus, we made an approach to possibly better solution with limited time, limited resources and limited costs. This paper aims to find a method to quantify the solving process of the first stage in the concurrent design – “task decomposition”, in order to make preparations necessary for the next two stages -“concurrent task process” and “convergent coordination”. According to product's functional unit, we first decentralized complex product system into sub-modules. Then determine the importance and coherenc

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Yu, Sui Ran, and Yun Wei Lu. "Design Task Decomposition in the Servo Press." Applied Mechanics and Materials 34-35 (October 2010): 981–87. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.981.

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This research is to find a design method for the large scale and complex product system. Thus, we made an approach to possibly better solution with limited time, limited resources and limited costs. This paper aims to find a method to quantify the solving process of the first stage in the concurrent design – “task decomposition”, in order to make preparations necessary for the next two stages -“concurrent task process” and “convergent coordination”. According to product's functional unit, we first decentralized complex product system into sub-modules. Then determine the importance and coherenc

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3

Castano, A., and S. Hutchinson. "Visual compliance: task-directed visual servo control." IEEE Transactions on Robotics and Automation 10, no. 3 (1994): 334–42. http://dx.doi.org/10.1109/70.294208.

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Liu, Dong, Ming Cong, Yu Du, Yunfei Zhang, and Clarence W. de Silva. "Visual attention servo control for task-specific robotic applications." International Journal of Control, Automation and Systems 11, no. 6 (2013): 1241–52. http://dx.doi.org/10.1007/s12555-012-9505-6.

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Molitor, Dirk Alexander, Viktor Arne, Daniel Spies, Florian Hoppe, and Peter Groche. "Task space control of ram poses of multipoint Servo Presses." Journal of Process Control 129 (September 2023): 103057. http://dx.doi.org/10.1016/j.jprocont.2023.103057.

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Lou, Jingjing. "Predictive Control-Based Completeness Analysis and Global Calibration of Robot Vision Features." Computational Intelligence and Neuroscience 2021 (December 9, 2021): 1–12. http://dx.doi.org/10.1155/2021/7241659.

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This paper provides an in-depth study and analysis of robot vision features for predictive control and a global calibration of their feature completeness. The acquisition and use of the complete macrofeature set are studied in the context of a robot task by defining the complete macrofeature set at the level of the overall purpose and constraints of the robot vision servo task. The visual feature set that can fully characterize the macropurpose and constraints of a vision servo task is defined as the complete macrofeature set. Due to the complexity of the task, a part of the features of the co

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Chesi, Graziano, and Koichi Hashimoto. "Configuration and Robustness in Visual Servo." Journal of Robotics and Mechatronics 16, no. 2 (2004): 178–85. http://dx.doi.org/10.20965/jrm.2004.p0178.

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Effects of camera calibration errors on the point-to-point task are investigated in static-eye and hand-eye visual servoing realized with position-based and image-based control laws. For these four configurations, the effect of uncertainty on the extrinsic parameters is analyzed. The results show local stability for all configurations under small calibration errors. However, a steady state error is found in the hand-eye position-based configuration. Simulations have been done to confirm the theoretical results and evaluate the effects of the uncertainty in terms of stability region. Another co

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Qiu, Yu, Baoquan Li, Wuxi Shi, and Yimei Chen. "Concurrent-learning-based visual servo tracking and scene identification of mobile robots." Assembly Automation 39, no. 3 (2019): 460–68. http://dx.doi.org/10.1108/aa-02-2018-024.

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PurposeThe purpose of this paper is to present a visual servo tracking strategy for the wheeled mobile robot, where the unknown feature depth information can be identified simultaneously in the visual servoing process.Design/methodology/approachBy using reference, desired and current images, system errors are constructed by measurable signals that are obtained by decomposing Euclidean homographies. Subsequently, by taking the advantage of the concurrent learning framework, both historical and current system data are used to construct an adaptive updating mechanism for recovering the unknown fe

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Feemster, Matthew, Jenelle A. Piepmeier, Harrison Biggs, Steven Yee, Hatem ElBidweihy, and Samara L. Firebaugh. "Autonomous Microrobotic Manipulation Using Visual Servo Control." Micromachines 11, no. 2 (2020): 132. http://dx.doi.org/10.3390/mi11020132.

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This describes the application of a visual servo control method to the microrobotic manipulation of polymer beads on a two-dimensional fluid interface. A microrobot, actuated through magnetic fields, is utilized to manipulate a non-magnetic polymer bead into a desired position. The controller utilizes multiple modes of robot actuation to address the different stages of the task. A filtering strategy employed in separation mode allows the robot to spiral from the manipuland in a fashion that promotes the manipulation positioning objective. Experiments demonstrate that our multiphase controller

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Yuksel, Tolga. "Sliding Surface Designs for Visual Servo Control of Quadrotors." Drones 7, no. 8 (2023): 531. http://dx.doi.org/10.3390/drones7080531.

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Autonomy is the main task of a quadrotor, and visual servoing assists with this task while providing fault tolerance under GPS failure. The main approach to visual servoing is image-based visual servoing, which uses image features directly without the need for pose estimation. The classical sliding surface design of sliding mode control is used by the linear controller law of image-based visual servoing, and focuses only on minimizing the error in the image features as convergence. In addition to providing convergence, performance characteristics such as visual-feature-convergence time, error,

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Su, Wei Hua, Xu Dong Ren, Wen Chang Zhang, and Fu Niu. "Task-Oriented Servo Loops Control of a 6-DOF Manipulator for Rescue Robot." Applied Mechanics and Materials 404 (September 2013): 663–67. http://dx.doi.org/10.4028/www.scientific.net/amm.404.663.

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The thesis research aimed to develop a novel approach to model and control a 6-DOF manipulator for specific tasks. The modeling and control method take into account velocity of the dynamical model. The camera and acquisition system were developed in order to significantly increase the bandwidth of the manipulator. Multi-Input and Multi-Output (MIMO) is used to optimally control the visual loop with respect to the proposed dynamical model. Experimental results on a 6-DOF manipulator for rescue robot are presented that validate the proposed model. Furthermore, a precise synchronization method is

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Paccot, Flavien, and Helene Chanal. "A generic method for servo tuning based on dynamic modeling and task description." ISA Transactions 80 (September 2018): 542–53. http://dx.doi.org/10.1016/j.isatra.2018.07.002.

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Woś, Piotr, and Ryszard Dindorf. "Synchronization of the movement for multi-cylinder electrohydraulic servo driver." EPJ Web of Conferences 269 (2022): 01069. http://dx.doi.org/10.1051/epjconf/202226901069.

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The article presents the problem of synchronization of piston rods velocity of the multi-cylinder electro-hydraulic servo drive. This task was presented on the example of a heavily loaded mobile caterpillar platform. For levelling the platform, a four-post electro-hydraulic support mechanism with a proportional valve control system was used. A linear external controller to synchronize the movement of the cylinders was used and a non-linear internal control system for each of the cylinders lifting the platform.

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Zhao, Wenshuai, Xi Wang, Yifu Long, Zhenhua Zhou, and Linhang Tian. "Robust LQR Design Method for the Aero-Engine Integral Constant Pressure Drop Control Valve with High Precision." Aerospace 10, no. 5 (2023): 428. http://dx.doi.org/10.3390/aerospace10050428.

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The closed-loop constant pressure drop control valve is widely used in aero-engine fuel servo metering systems. However, the available constant pressure drop control valve cannot realize servo tracking without static error and, often, a high proportional gain is used to reduce the static error and improve the servo tracking performance, which reduces the stability margin. In this paper, an integral constant pressure drop control valve is designed, which consists of an integral controller and a stabilizing controller. Moreover, a robust LQR design method is proposed to complete the design task.

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Zou, Liying, Huiguang Li, Wei Zhao, and Lei Zhu. "Imaged-Based Visual Servo Control for a VTOL Aircraft." Mathematical Problems in Engineering 2017 (2017): 1–6. http://dx.doi.org/10.1155/2017/4806769.

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This paper presents a novel control strategy to force a vertical take-off and landing (VTOL) aircraft to accomplish the pinpoint landing task. The control development is based on the image-based visual servoing method and the back-stepping technique; its design differs from the existing methods because the controller maps the image errors onto the actuator space via a visual model which does not contain the depth information of the feature point. The novelty of the proposed method is to extend the image-based visual servoing technique to the VTOL aircraft control. In addition, the Lyapunov the

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Naing, Zaw Myo. "Development of Servo Drive Positioning Control System Using PID Controller and Fuzzy Logic Controller." Proceedings of Universities. Electronics 26, no. 6 (2021): 583–88. http://dx.doi.org/10.24151/1561-5405-2021-26-6-583-588.

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Servo drives are one of the most widely utilized devices in various mechanical systems and industrial applications to provide precise position control. The study of servo driver produc-tiveness and performance index is the important task. In this work, PID controller and fuzzy log-ic controller (FLC) were developed to control the position of a DC servo drive. The MATLAB Simulink program was investigated and implemented to calculate the values of servo drive pa-rameters, and a scheme for simulating the operation of a servo drive using different controllers was presented. A mathematical model of

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Gu, Jinlin, Mingchao Zhu, Lihua Cao, Ang Li, Wenrui Wang, and Zhenbang Xu. "Improved Uncalibrated Visual Servo Strategy for Hyper-Redundant Manipulators in On-Orbit Automatic Assembly." Applied Sciences 10, no. 19 (2020): 6968. http://dx.doi.org/10.3390/app10196968.

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Aiming at on-orbit automatic assembly, an improved uncalibrated visual servo strategy for hyper-redundant manipulators based on projective homography is proposed. This strategy uses an improved homography-based task function with lower dimensions while maintaining its robustness to image defects and noise. This not only improves the real-time performance but also makes the joint space of hyper-redundant manipulator redundant to the homography-based task function. Considering that the kinematic parameters of the manipulator are easily changed in a space environment, the total Jacobian between t

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18

Blajer, Wojciech, Robert Seifried, and Krzysztof Kołodziejczyk. "Diversity of Servo-Constraint Problems for Underactuated Mechanical Systems: A Case Study Illustration." Solid State Phenomena 198 (March 2013): 473–82. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.473.

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Underactuated mechanical systems are systems with fewer control inputs than degrees of freedom. Determination of an input control strategy that forces an underactuated system to complete specified in time outputs (servo-constraints), whose number is equal to the number of inputs, can be a challenging task. Diversity of the servo-constraint problems is discussed here using a simple spring-mass system mounted on a carriage (two degrees of freedom, one control input, and one specified in time output). A formulation of underactuated system dynamics which includes the output coordinates is motivate

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Medvedev, A. V., and E. M. Khalatov. "Method of individual selection of parts for selective assembly of electrohydraulic servo drives." VESTNIK of Samara University. Aerospace and Mechanical Engineering 22, no. 2 (2023): 67–78. http://dx.doi.org/10.18287/2541-7533-2023-22-2-67-78.

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A method for selecting parts and assembly units (hereinafter briefly referred to as parts) in sets for assembling a batch of electrohydraulic servo drives is presented, based on the measured (individual) mechanical and hydraulic characteristics of the parts. The preparatory stage is described: construction of a mathematical model of the product, determination of the parameters of parts and adjustments that have the greatest impact on the parameters of end products, formation of a system for assessing the quality of products in the batch, mathematical formulation of the task of selecting parts.

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20

Precup, Radu-Emil, Stefan Preitl, Claudia-Adina Bojan-Dragos, Elena-Lorena Hedrea, Raul-Cristian Roman, and Emil M. Petriu. "A LOW-COST APPROACH TO DATA-DRIVEN FUZZY CONTROL OF SERVO SYSTEMS." Facta Universitatis, Series: Mechanical Engineering 20, no. 1 (2022): 021. http://dx.doi.org/10.22190/fume220111005p.

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Servo systems become more and more important in control systems applications in various fields as both separate control systems and actuators. Ensuring very good control system performance using few information on the servo system model (viewed as a controlled process) is a challenging task. Starting with authors’ results on data-driven model-free control, fuzzy control and the indirect model-free tuning of fuzzy controllers, this paper suggests a low-cost approach to the data-driven fuzzy control of servo systems. The data-driven fuzzy control approach consists of six steps: (i) open-loop dat

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Wang, Shunjiang, Zhaowei Ling, Ruichao Xu, Guiping Zhou, and Yifang Jin. "Adaptive back-stepping Control of Electro-hydraulic Servo system of Steam Turbine." Journal of Physics: Conference Series 2558, no. 1 (2023): 012040. http://dx.doi.org/10.1088/1742-6596/2558/1/012040.

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Abstract The parameters such as oil density and bulk elastic modulus of hydraulic oil in steam turbine electro-hydraulic servo system vary with ambient temperature, pressure, and other factors, and there are unmodeled dynamics in the system, so obtaining a satisfactory following effect is a challenging task for the electro-hydraulic servo(EHS) system. According to the principle of force balance and flow continuity, the mathematical model of a bilateral oil intake motor is established in this paper. On this basis, a back-stepping controller is designed, and an adaptive method is used to estimat

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Bożek, Andrzej. "Discovering Stick-Slip-Resistant Servo Control Algorithm Using Genetic Programming." Sensors 22, no. 1 (2022): 383. http://dx.doi.org/10.3390/s22010383.

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The stick-slip is one of negative phenomena caused by friction in servo systems. It is a consequence of complicated nonlinear friction characteristics, especially the so-called Stribeck effect. Much research has been done on control algorithms suppressing the stick-slip, but no simple solution has been found. In this work, a new approach is proposed based on genetic programming. The genetic programming is a machine learning technique constructing symbolic representation of programs or expressions by evolutionary process. In this way, the servo control algorithm optimally suppressing the stick-

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Ali, Kamran, Zhenwei Cao, Kamal Rsetam, and Zhihong Man. "Practical Adaptive Fast Terminal Sliding Mode Control for Servo Motors." Actuators 12, no. 12 (2023): 433. http://dx.doi.org/10.3390/act12120433.

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Position control of servo motor systems is a challenging task because of inevitable factors such as uncertainties, nonlinearities, parametric variations, and external perturbations. In this article, to alleviate the above issues, a practical adaptive fast terminal sliding mode control (PAFTSMC) is proposed for better tracking performance of the servo motor system by using a state observer and bidirectional adaptive law. First, a smooth-tangent-hyperbolic-function-based practical fast terminal sliding mode control (PFTSM) surface is designed to ensure not only fast finite time tracking error co

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ISHIBASHI, Ryota. "A study of the task space P-SD servo controller with the finger-tip tracing motion." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2016 (2016): 1P1–11b1. http://dx.doi.org/10.1299/jsmermd.2016.1p1-11b1.

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Wang, Hongfei, and Yongkang Shi. "Design of UAV target tracking controller based on visual servo." Journal of Physics: Conference Series 2246, no. 1 (2022): 012051. http://dx.doi.org/10.1088/1742-6596/2246/1/012051.

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Abstract The task of tracking a moving target by the UAV has two major challenges: one is that the multi-angle and multi-scale changes caused by the target’s movement make the target detection more difficult, the other is that the stability and accurate of target tracking are difficult to guarantee. In order to solve these problems, using monocular vision to get the image information of the target and YOLOv4 is used to detect multi-angle and multi-scale moving targets. Then based on the image visual servo control method, the PID controller is designed, and the deviation between the target pixe

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Mohammed, Sanusi, Adamu Shehu, Shuaibu Sanda Hussaini, and Abubakar Usman Rumba. "The Design,Implementationand Performance Analysisof a Smart Fire Fighting Robot." International Journal of Scientific and Academic Research 03, no. 05 (2023): 01–08. http://dx.doi.org/10.54756/ijsar.2023.v3.5.1.

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This research work Titled “Design and Implementation of a Smart Firefighting Robot” focused on developing a robotic system capable of moving to areas wherefiremen have to risk their lives to put off the fire.Fire disaster occur at any time and at any place without notice, which result in high losses.Due to the damage of buildings and explosive materials, it becomes a major task to save people and to put off the fire.The robot will reduce the risk of injury for firefighters and possible victims and minimize the monitory losses which increase considerably as fire duration increases. It consists

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Chen, Z. H., Y. Wang, P. Ouyang, J. Huang, and W. J. Zhang. "A novel iteration-based controller for hybrid machine systems for trajectory tracking at the end-effector level." Robotica 29, no. 2 (2010): 317–24. http://dx.doi.org/10.1017/s0263574710000159.

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SUMMARYHybrid actuation systems consist of two types of motors: constant velocity (CV) motor and servo (SV) motor. The CV motor can produce a large power but with a poor task flexibility. On the other hand, the SV motor has an excellent task flexibility but with a small power capacity. Combination of these two types of motors into a coherent driver architecture for machine systems is extremely promising, because they complement each other. Existing studies on the hybrid actuation or machine system usually employ two servo motors, one of which substitutes the CV motor. This treatment compromise

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Pliuhin, Vladyslav, Oleksandr Aksonov, Yevgen Tsegelnyk, Sergiy Plankovskyy, Volodymyr Kombarov, and Lidiia Piddubna. "Design and Simulation of a Servo-Drive Motor Using ANSYS Electromagnetics." Lighting Engineering & Power Engineering 60, no. 3 (2021): 112–23. http://dx.doi.org/10.33042/2079-424x.2021.60.3.04.

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The paper is devoted to determining the output parameters of a servomotor, which belongs to synchronous machines with permanent magnets, in order to further determine the characteristics of transient modes in the software package ANSYS Electromagnetics. RMxprt, part of ANSYS Electromagnetics, allows to determine the parameters of windings, losses, motor performance, but requires filling out a form with a complete set of geometric dimensions and winding data. Of course, such data are not available in the motor data sheet, so the first task solved in the paper is to determine all the necessary a

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Li, Liang, Junqi Luo, Peitao Hong, Wenhao Bai, Zhenyu Zhang, and Liucun Zhu. "Robust Adaptive Robotic Visual Servo Grasping with Guaranteed Field of View Constraints." Actuators 13, no. 11 (2024): 457. http://dx.doi.org/10.3390/act13110457.

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Visual servo grasping technology has garnered significant attention in intelligent manufacturing for its potential to enhance both the flexibility and precision of robotic operations. However, traditional approaches frequently encounter challenges such as task failure when visual features move outside the camera’s field of view (FoV) and system instability due to interaction matrix singularities, limiting the technology’s effectiveness in complex environments. This study introduces a novel control strategy that leverages an asymmetric time-varying performance function to address the issue of v

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Gao, Bingwei, and Yongtai Ye. "Research on Position / Velocity Synergistic Control of Electro Hydraulic Servo System." Recent Patents on Mechanical Engineering 13, no. 4 (2020): 366–77. http://dx.doi.org/10.2174/2212797613999200420082115.

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Background: In some applications, the requirements of electro-hydraulic servo system are not only precise positioning, but also the speediness capability at which the actuator is operated. Objective: In order to enable the system to achieve rapid start and stop during the work process, reduce the vibration and impact caused by the change of the velocity, at the same time improve the positioning accuracy, and further strengthen the stability and the work efficiency of the system, it is necessary to perform the synergistic control between the position and the velocity of the electrohydraulic ser

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Wang, Yuxin, Hesheng Wang, Zhe Liu, and Weidong Chen. "Visual Servo-Collision Avoidance Hybrid Task by Considering Detection and Localization of Contact for a Soft Manipulator." IEEE/ASME Transactions on Mechatronics 25, no. 3 (2020): 1310–21. http://dx.doi.org/10.1109/tmech.2020.2974296.

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He, Xiaolong, Yuan Wang, Yapeng Shi, et al. "Parameter Sensitivity Analysis of a Brake Pressure Control System in Aviation Using an Electro-Hydraulic Servo Valve." Electronics 11, no. 5 (2022): 746. http://dx.doi.org/10.3390/electronics11050746.

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The landing gear system has the task of bearing the weight of the aircraft, bearing the impact load, and providing the braking function in the process of the aircraft taxiing, take-off, and landing. There are many parameters in the aviation brake pressure servo valve-controlled cylinder system (ABPSVCS) which will have a significant influence on the dynamic behavior of the system. Sensitivity analysis is an effective method to analyze the influence of system parameters on system characteristics, especially for nonlinear systems. The trajectory sensitivity method based on the description of sys

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Angelakis, Dimitris, Errikos C. Ventouras, Spiros Kostopoulos, and Pantelis Asvestas. "Comparative Analysis of Deep Learning Models for Optimal EEG-Based Real-Time Servo Motor Control." Eng 5, no. 3 (2024): 1708–36. http://dx.doi.org/10.3390/eng5030090.

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This study harnesses EEG signals to enable the real-time control of servo motors, utilizing the OpenBCI Community Dataset to identify and assess brainwave patterns related to motor imagery tasks. Specifically, the dataset includes EEG data from 52 subjects, capturing electrical brain activity while participants imagined executing specific motor tasks. Each participant underwent multiple trials for each motor imagery task, ensuring a diverse and comprehensive dataset for model training and evaluation. A deep neural network model comprising convolutional and bidirectional long short-term memory

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Chew, Zhe Zhi, Kok seng Eu, Kian Neng Yap, et al. "AUTOMATIC ASSEMBLY OF INTERLOCKING BUILDING CUBES BY USING VISUAL SERVOING APPROACH." Suranaree Journal of Science and Technology 31, no. 1 (2024): 010274(1–10). http://dx.doi.org/10.55766/sujst-2024-01-e0462.

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Most of the robotic arms are set up for operation by the teach-and-repeat (T&R) technique, also known as coordinate-based control, using pre-recorded coordination values to generate robotic arm trajectories. This technique is inefficient because it requires teaching a robotic arm every single coordinate point to complete an operation. It is a manual, tedious and time-consuming task. Moreover, this task needs to be repeated if there are slight changes in the operation. This paper studied the visual servoing approach to replace the T&R technique in assembling different interlocking build

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Stojanovic, Vladimir. "Fault-tolerant control of a hydraulic servo actuator via adaptive dynamic programming." Mathematical Modelling and Control 3, no. 3 (2023): 181–91. http://dx.doi.org/10.3934/mmc.2023016.

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<abstract><p>The fault-tolerant control problem of a hydraulic servo actuator in the presence of actuator faults is studied utilizing adaptive dynamic programming. This task is challenging because of unknown system dynamics, uncertain disturbances or unmeasurable system states of such highly nonlinear systems in real applications. The aim is to achieve asymptotic tracking and actuator faults compensation by minimizing some predefined performance index. The discrete-time algebraic Riccati equation is iteratively solved by the adaptive dynamic programming approach. For practical reas

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Arif, Zubair, and Yili Fu. "Mix Frame Visual Servo Control Framework for Autonomous Assistive Robotic Arms." Sensors 22, no. 2 (2022): 642. http://dx.doi.org/10.3390/s22020642.

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Assistive robotic arms (ARAs) that provide care to the elderly and people with disabilities, are a significant part of Human-Robot Interaction (HRI). Presently available ARAs provide non-intuitive interfaces such as joysticks for control and thus, lacks the autonomy to perform daily activities. This study proposes that, for inducing autonomous behavior in ARAs, visual sensors integration is vital, and visual servoing in the direct Cartesian control mode is the preferred method. Generally, ARAs are designed in a configuration where its end-effector’s position is defined in the fixed base frame

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Duan, Qianwen, Qiunong He, Yao Mao, Xi Zhou, and Qintao Hu. "Proximate Time-Optimal Servomechanism Based on Transition Process for Electro-Optical Set-Point Tracking Servo System." Applied Sciences 9, no. 23 (2019): 5201. http://dx.doi.org/10.3390/app9235201.

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Set-point tracking servo systems encounter the problem of the trade-off between the swiftness and smoothness in tracking task. To deal with this problem, the proximate time-optimal servomechanism based on transition process (PTSTP) is proposed in this paper. The PTSTP control scheme incorporates a transition process (TP) into the framework of proximate time-optimal servomechanism (PTOS) to eliminate the conservatism of the original PTOS without the controller changing. The target position signal amplitude and the ultimate ability of actuator are utilized to design the time-optimal TP to make t

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Lee, Kyeong Ha, Seung Guk Baek, Hyouk Ryeol Choi, Hyungpil Moon, Sang-Hoon Ji, and Ja Choon Koo. "Feedforward model-inverse position control of three-stage servo-valve using zero magnitude error tracking control." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 233, no. 7 (2018): 2340–48. http://dx.doi.org/10.1177/0954406218786533.

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Three-stage servo-valves are popularly used in hydraulic systems that require large flow rate and high pressure. For a proper control of flow direction and flow rate fed into a hydraulic actuator, securing a proper position control bandwidth is a critical task for the servo-valve. In this paper, a set of popular control methods are systematically studied and a control method is selected. It is proven that the feedforward model-inverse control is the most effective method in terms of the control bandwidth. In the present work, the feedforward closed-loop architecture is adopted and the closed-l

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Hyun, J. H., and C. O. Lee. "Optimization of feedback gains for a hydraulic servo system by genetic algorithms." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 212, no. 5 (1998): 395–401. http://dx.doi.org/10.1243/0959651981539569.

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The optimal values of the five feedback gains of a double-loop controller for the speed control of an overcentred variable-displacement hydraulic motor are experimentally determined by using genetic algorithms. The reciprocal of the criterion of integration of time multiplied by absolute error is proposed as the fitness function that evaluates the performance of the control. The appropriate specification of the genetic algorithms and the search range of each control gain for the speed control system are presented. It is found that the near-optimal values of the feedback gains can be obtained w

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Yamtuan, Kawin, Trirat Radomngam, and Pradya Prempraneerach. "Visual Servo Kinematic Control of Delta Robot using YOLOv5 Algorithm." Journal of Robotics and Control (JRC) 4, no. 6 (2023): 818–31. http://dx.doi.org/10.18196/jrc.v4i6.19102.

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Industrial delta robots with motion-and vision-base controllers, providing high-precision and fast/flexible motion, normally come with high cost and complex software. Low-cost delta robots with vision solution could be beneficial to vast industries to increase productivity and to reduce labor cost. A delta robot using a low-cost motion controller and an open-source vision system is developed to accomplish real-time visual servoing with high motion accuracy. In the low-cost motion controller, three parallel links’ upper-arm angles, computed from inverse kinematics for a given desired target pos

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Righettini, Paolo, Roberto Strada, and Filippo Cortinovis. "General Procedure for Servo-Axis Design in Multi-Degree-of-Freedom Machinery Subject to Mixed Loads." Machines 10, no. 6 (2022): 454. http://dx.doi.org/10.3390/machines10060454.

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The motion performances of multi-axis machinery are strongly related to the proper design of the servo axes driving the actuated joints, which must fulfil motion requests in terms of speed and torque for the motion design task. Multi-degree-of-freedom machinery highlights, at the joint level, mixed-load conditions due to high dynamic movements and external working forces. Moreover, such systems have a dynamic coupling between the axes due to their mechanical configuration. This mixed-load condition makes the servo-axes design, whose result is the selection of the couple power drive system and

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Filaretov, V., A. Zuev, A. Zhirabok, and A. Protsenko. "Development of Fault Identification System for Electric Servo Actuators of Multilink Manipulators Using Logic-Dynamic Approach." Journal of Control Science and Engineering 2017 (2017): 1–8. http://dx.doi.org/10.1155/2017/8168627.

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This paper presents the method of synthesis of faults identification systems for electric servo actuators of multilink manipulators. These actuators are described by nonlinear equations with significantly changing coefficients. The proposed method is based on logic-dynamic approach for design of diagnostic observers for fault detection and isolation. An advantage of this approach is that it allows studying systems with nonsmooth nonlinearities by linear methods only. For solving the task of faults identification, a residual signal feedback was proposed to be used for observers. The efficiency

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Wang, Yingxiang, and Jian Gao. "Reinforcement-Learning-Based Visual Servoing of Underwater Vehicle Dual-Manipulator System." Journal of Marine Science and Engineering 12, no. 6 (2024): 940. http://dx.doi.org/10.3390/jmse12060940.

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As a substitute for human arms, underwater vehicle dual-manipulator systems (UVDMSs) have attracted the interest of global researchers. Visual servoing is an important tool for the positioning and tracking control of UVDMSs. In this paper, a reinforcement-learning-based adaptive control strategy for the UVDMS visual servo, considering the model uncertainties, is proposed. Initially, the kinematic control is designed by developing a hybrid visual servo approach using the information from multi-cameras. The command velocity of the whole system is produced through a task priority method. Then, th

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Liu, Hanyang, Feng Sheng, Xinyu Lu, and Jing Lin. "MCSA-based fault diagnosis for rotary parts in servo motion system: Approach and experimental study." Journal of Physics: Conference Series 2762, no. 1 (2024): 012055. http://dx.doi.org/10.1088/1742-6596/2762/1/012055.

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Abstract Motor current signature analysis (MCSA), as a non-invasive diagnostic method, is robust to environmental noise and of less sensor cost than vibration-based monitoring. Although large amount of progress has been achieved, little attention is paid to the MCSA-based diagnosis task in the Servo motion systems (SMS). An approach using Park vector demodulation, comb filtering and the ensemble empirical mode decomposition (EEMD) is proposed for cyclic fault event detection in this paper. Experiment studies reveal that the MCSA approach could extract the fault signature under extremely low-sp

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Yao, Jianjun, Xiancheng Wang, Shenghai Hu, and Wei Fu. "Adaline neural network-based adaptive inverse control for an electro-hydraulic servo system." Journal of Vibration and Control 17, no. 13 (2011): 2007–14. http://dx.doi.org/10.1177/1077546310395972.

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Based on adaptive inverse control theory, combined with neural network, neural network adaptive inverse controller is developed and applied to an electro-hydraulic servo system. The system inverse model identifier is constructed by neural network. The task is accomplished by generating a tracking error between the input command signal and the system response. The weights of the neural network are updated by the error signal in such a way that the error is minimized in the sense of mean square using (LMS) algorithm and the neural network is close to the system inverse model. The above steps mak

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MR.SANKET, MANE, KHARAT MS.POOJA, UMESH A. CHATTE MR., UTKARSH KADAM MR., and KHUPASE MR.VIKRAM. "ARDUINO BASED OBJECT SORTING." IJIERT - International Journal of Innovations in Engineering Research and Technology NCMTEE-2K18 (March 31, 2018): 94–97. https://doi.org/10.5281/zenodo.1451219.

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Now a day�s industrial area requires demand for automation. D ue to automation human efforts are goes on decreasing since last decade. The o bject sorting based on colour i s difficult task in recent days . In industry there is rapidly increasing demands for automation. The Sorting of objects based on colour is very difficult task. This project gives us an idea about automatic colour sorting . Here we are designing and im plementing an efficient colour sorting using colour sensor TCS3200 based on Arduino UNO. This project gives high accuracy and performance. Easy to operate and construct which

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Qadri, Mansoor Zahoor, Ahsan Ali, and Inam-ul-Hassan Sheikh. "HYBRID ITERATIVE LEARNING CONTROL FOR POSITION TRACKING OF AN ELECTRO HYDRAULIC SERVO SYSTEM." NED University Journal of Research XVI, no. 2 (2019): 31–42. http://dx.doi.org/10.35453/nedjr-ascn-2018-0046.

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Accurate position control of an electro hydraulic servo system (EHSS) is a challenging task due to inherent system nonlinearities, parametric variations and un-modelled dynamics. Since feedback controllers alone cannot provide perfect tracking control, an integration of feedback and feed forward controller is required. A cascaded iterative learning control (ILC) technique for position control of EHSS is proposed in this paper. ILC is a feed forward controller which modifies the reference signal for a feedback fractional order proportional-integral-derivative (PID) controller by learning throug

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Guo, Yong Feng, Song Luo, Ze Bin Ling, and Xiao You Zhang. "Research of Drives of Power Amplifiers of Magnetic Levitation Servo Spindle Applied to Micro EDM Based on FPGA." Key Engineering Materials 621 (August 2014): 564–69. http://dx.doi.org/10.4028/www.scientific.net/kem.621.564.

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The drives of power amplifiers of magnetic levitation servo spindle applied to micro EDM (Electron discharge machining) based on FPGA (Field programmable gate array) are developed. The drive module that produces the PWM (Pulse width modulation) waves that conform to the requirements of spindle power amplifiers involving three-level half bridge switch power amplifier, three-level full bridge switch power amplifier and motor power amplifier, according to input of action values from magnetic levitation servo spindle controller DSP (Digital signal processor) is designed. Multi-PWM producing algori

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Mandal, Kingshuk, Dipankar Bose, Souren Mitra, and Soumya Sarkar. "Experimental investigation of process parameters in WEDM of Al 7075 alloy." Manufacturing Review 7 (2020): 30. http://dx.doi.org/10.1051/mfreview/2020021.

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Process parameters selection is a critical task in wire electro-discharge machining (WEDM). The parameter settings would vary when a material to be machined is changed. In the present study, experimental investigation has been carried out for appropriate selection of process parameters in WEDM of Al 7075. It has been perceived that pulse on time (Ton), arc on time (Aon) pulse off time (Toff), arc off time (Aoff), servo sensitivity (Sc), wire tension (Wt) and servo voltage (Sv) are the major influencing factors on machining speed (Vc), corner error (Ce) and surface roughness (Ra) for this alloy

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Ur Rahman, Muhammad Zia, Muhammad Tanveer Riaz, M. M. Sayed Al Mahmud, Mohsin Rizwan, and Muhammad Ahmad Choudhry. "The Prescribed Fixed Structure Intelligent Robust Control of an Electrohydraulic Servo System." Mathematical Problems in Engineering 2022 (March 8, 2022): 1–12. http://dx.doi.org/10.1155/2022/5144602.

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The paper is focused to design a robust and a simple fixed structure H ∞ control synthesis for an Electrohydraulic Servo System (EHSS) and comparing its performance with the conventional H ∞ controller and the classical proportional integral derivative (PID) controller. The precise position tracking of the piston load of EHSS system using classical PID controller is a difficult task due to some non-linear properties of EHSS and the dynamic behaviour of its parameters. The conventional H ∞ controllers also have constraints on gain ( H ∞ norm) for typical design requirement such as the speed of

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