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Author : Basil Jacob Joseph
Publisher :
ISBN 13 :
Total Pages : 380 pages
Book Rating : 4.3/5 (129 download)
Download or read book Modeling and Performance of a Hydraulic Actuator System written by Basil Jacob Joseph and published by . This book was released on 1995 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (742 download)
Download or read book Performance Modeling of a Piezohydraulic Actuator with Active Valves written by and published by . This book was released on 2003 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Piezohydraulic actuation is the use of hydraulic fluid to rectify the high frequency, small stroke oscillation movement of the piezoceramic stack into a unidirectional movement. This paper presents a quasi-steady incompressible flow model and a compressible flow model for performance simulation. These two models are derived based on the energy equations for hydraulic flow in circular pipe. Major losses and minor losses are identified and incorporated in the model. Assumptions and approximations were made to minimize computation effort while achieving good accuracy. A piezohydraulic actuation system with active valves is then built and tested. Comparison with test results shows that the simulations accurately predict system performance under loads at which value leakage is not present. The results reveal that friction losses due to viscosity are a major limitation of performance for the current test setup when operating at higher frequencies.
Author : Qing Guo
Publisher : CRC Press
ISBN 13 : 1351798251
Total Pages : 198 pages
Book Rating : 4.3/5 (517 download)
Download or read book Nonlinear Control Techniques for Electro-Hydraulic Actuators in Robotics Engineering written by Qing Guo and published by CRC Press. This book was released on 2017-08-14 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonlinear Control Techniques for Electro-Hydraulic Actuators in Robotics Engineering meets the needs of those working in advanced electro-hydraulic controls for modern mechatronic and robotic systems. The non-linear EHS control methods covered are proving to be more effective than traditional controllers, such as PIDs. The control strategies given address parametric uncertainty, unknown external load disturbance, single-rod actuator characteristics, and control saturation. Theoretical and experimental validations are explained, and examples provided. Based on the authors' cutting-edge research, this work is an important resource for engineers, researchers, and students working in EHS.
Author : Mark Alan Kleidon
Publisher :
ISBN 13 :
Total Pages : 254 pages
Book Rating : 4.:/5 (12 download)
Download or read book Modeling and Performance of a Pneumatic/Hydraulic Hybrid Actuator with Tunable Mechanical Impedance written by Mark Alan Kleidon and published by . This book was released on 1983 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nicolae Vasiliu
Publisher : CRC Press
ISBN 13 : 1351645161
Total Pages : 761 pages
Book Rating : 4.3/5 (516 download)
Download or read book Simulation of Fluid Power Systems with Simcenter Amesim written by Nicolae Vasiliu and published by CRC Press. This book was released on 2018-04-09 with total page 761 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book illustrates numerical simulation of fluid power systems by LMS Amesim Platform covering hydrostatic transmissions, electro hydraulic servo valves, hydraulic servomechanisms for aerospace engineering, speed governors for power machines, fuel injection systems, and automotive servo systems It includes hydrostatic transmissions, automotive fuel injection, hydropower speed units governor, aerospace servo systems along with case studies of specified companies Aids in predicting and optimizing the static and dynamic performances related to the systems under study
Author : J. Jaidev Vyas
Publisher : Springer
ISBN 13 : 9811325472
Total Pages : 70 pages
Book Rating : 4.8/5 (113 download)
Download or read book Electro-Hydraulic Actuation Systems written by J. Jaidev Vyas and published by Springer. This book was released on 2018-09-01 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book serves as a unique integrated platform, which not only describes the design methodology of electro-hydraulic actuation systems but also provides insights into the design of the servo valve, which is the most important component in the system. It presents a step-by-step design process, comparative tables, illustrative figures, and detailed explanations. The book focuses on the design and testing of electro-hydraulic actuation systems, which are increasingly being used in motion control applications, particularly in those where precision actuation at high operational rates is of prime importance. It describes in detail the design philosophy of such high-performance systems, presenting a system used as a physical test setup together with experimental results to corroborate the calculations. Of particular interest are the electro-hydraulic servo valves that form the heart of these actuations. These valves are complex and not much data is available in open literature due to OEM propriety issues. In this context, the book discusses the elaborate mathematical models that have been derived and an approach to validate the mathematical models with test results. Presenting the complex methodology in simple language, it will prove to be a valuable resource for students, researchers, and professional engineers alike.
Author : Mohieddine Jelali
Publisher : Springer Science & Business Media
ISBN 13 : 1447100999
Total Pages : 380 pages
Book Rating : 4.4/5 (471 download)
Download or read book Hydraulic Servo-systems written by Mohieddine Jelali and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date book details the basic concepts of many recent developments of nonlinear identification and nonlinear control, and their application to hydraulic servo-systems. It is very application-oriented and provides the reader with detailed working procedures and hints for implementation routines and software tools.
Author : Arthur L. Helinski
Publisher :
ISBN 13 :
Total Pages : 43 pages
Book Rating : 4.:/5 (227 download)
Download or read book Deriving an Empirical Model of an Electrohydraulic Actuator System from Frequency Response Data written by Arthur L. Helinski and published by . This book was released on 1988 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report, prepared by the Analytical and Physical Simulation Branch of the Tank-Automotive Technology Directorate, describes an empirical approach to modeling the hydraulic/actuator portion of a physical simulation system. A frequency response curve fit technique is applied to measure actuator responses. The curve fit technique will not produce a general analytical model but will provide an empirical model which should incorporate the system's performance characteristics for many types of analyses. The objective of this study is to define a means of predicting the validity and fidelity of physical simulation testing before actual laboratory test runs are made. In the past, the hydraulic/actuator system was assumed to be ideal where the actuator responds perfectly to the desired command signal. Motions were directly predicted from the command signals or the source from which the command signals were derived, but these prediction techniques did not account for the performance capabilities of the hydraulic/actuator system. The process used in the past gave inaccurate predictions of accelerations for simulation tests which contained high-frequency components (i.e., frequencies beyond the system's bandwidth). Keywords: Trucks, 5-Ton truck.
Author : Vladimir Pastrakuljic
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Design and Modeling of a New Electro Hydraulic Actuator written by Vladimir Pastrakuljic and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis addresses the issues of design and mathematical model identification of an advanced hydraulic system referred to as Electro Hydraulic Actuator (EHA). In the design part, insights into system design methodology are presented and used for the EHA prototype manufacturing. To get better knowledge of the system behavior, extensive open loop tests were performed. Test results are presented in the time and frequency domain, and it was concluded that system behavior is nonlinear. In the modeling part, a nonlinear mathematical model of the EHA is derived. Some of the unknown model parameters had to be identified experimentally by optimization. The last step in the system mathematical modeling was open and closed loop model validation using the experimental data. Proposed nonlinear mathematical model gives good correspondence with experimental data and can be used for system studying or controller design. Performed test show that the EHA system has high positioning accuracy (0.01mm), fairly high bandwidth (23 Hz with 20kg inertial load) and is easy to control. It shows significant benefits when compared to conventional hydraulic systems in the areas of control, efficiency and physical dimensions.
Author : Xinjiang Lu
Publisher : Springer
ISBN 13 : 9811055831
Total Pages : 228 pages
Book Rating : 4.8/5 (11 download)
Download or read book Modeling, Analysis and Control of Hydraulic Actuator for Forging written by Xinjiang Lu and published by Springer. This book was released on 2017-12-30 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes load modeling approaches for complex work pieces and batch forgings, and demonstrates analytical modeling and data-driven modeling approaches for known and unknown complex forging processes. It overcomes the current shortcomings of modeling, analysis and control approaches, presenting contributions in three major areas: In the first, several novel modeling approaches are proposed: a process/shape-decomposition modeling method to help estimate the deformation force; an online probabilistic learning machine for the modeling of batch forging processes; and several data-driven identification and modeling approaches for unknown forging processes under different work conditions. The second area develops model-based dynamic analysis methods to derive the conditions of stability and creep. Lastly, several novel intelligent control methods are proposed for complex forging processes. One of the most serious problems in forging forming involves the inaccurate forging conditions, velocity and position offered by the hydraulic actuator due to the complexity of both the deformation process of the metal work piece and the motion process of the hydraulic actuator. The book summarizes the current weaknesses of modeling, analysis and control approaches. are summarized as follows: a) With the current modeling approaches it is difficult to model complex forging processes with unknown parameters, as they only model the dynamics in local working areas but do not effectively model unknown nonlinear systems across multiple working areas; further, they do not take the batch forging process into account, let alone its distribution modeling. b) All previous dynamic analysis studies simplify the forging system to having a single-frequency pressure fluctuation and neglect the influences of non-linear load force. Further, they fail to take the flow equation in both valves and cylinders into account. c) Conventional control approaches only consider the linear deformation force and pay no attention to sudden changes and the motion synchronization for the multi-cylinder system, making them less effective for complex, nonlinear time-varying forging processes subject to sudden changes.
Author : Martin Hochwallner
Publisher : Linköping University Electronic Press
ISBN 13 : 9176854256
Total Pages : 91 pages
Book Rating : 4.1/5 (768 download)
Download or read book On Motion Control of Linear Incremental Hydraulic Actuators written by Martin Hochwallner and published by Linköping University Electronic Press. This book was released on 2017-10-24 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: Linear Incremental Hydraulic Actuators combine one or more short-stroke cylinders, and two or more engaging/disengaging mechanisms into one actuator with long, medium, or even unlimited stroke length. The motion of each single short-stroke actuator concatenated by the engaging/disengaging mechanisms forms the motion of the linear incremental hydraulic actuator. The patterns of how these motions are concatenated form the gaits of a specific linear incremental hydraulic actuator. Linear incremental hydraulic actuators may have more than one gait. In an application, the gaits may be combined to achieve optimal performance at various operating points. The distinguishing characteristic of linear incremental hydraulic actuators is the incremental motion. The term incremental actuator is seen as analogous to the incremental versus absolute position sensor. Incremental actuators realize naturally relative positioning. Incremental motion means also that the behavior does not depend on an absolute position but only on the relative position within a cycle or step. Incremental actuators may realize discrete incremental or continuous incremental motion. Discrete incremental actuators can only approach discrete positions, whereby stepper drives are one prominent example. In contrast, continuous incremental actuators may approach any position. Linear electric motors are one example of continuous incremental actuators. The actuator has no inherent limitation in stroke length, as every step or cycle adds only to the state at the beginning of the step or cycle and does not depend on the absolute position. This led to the alternative working title Hydraulic Infinite Linear Actuator. Linear incremental hydraulic actuator provides long stroke, high force, and linear motion and has the potential to decrease the necessary resource usage,minimize environmental impact, e.g. from potential oil spillage,extend the range of feasible products: longer, stiffer, better, etc. This thesis presents an analysis of the characteristics and properties of linear incremental hydraulic actuators as well as the gaits and possible realizations of some gaits. The gait for continuous, smooth motion with two cylinders is comprehensively studied and a control concept for the tracking problem is proposed. The control concept encapsulates the complexity of the linear incremental hydraulic actuator so that an application does not have to deal with it. One other gait, the ballistic gait, which realizes fast, energy-efficient motion, enabling energy recuperation is studied.
Author : Oriol Gomis-Bellmunt
Publisher : Springer Science & Business Media
ISBN 13 : 1848826141
Total Pages : 217 pages
Book Rating : 4.8/5 (488 download)
Download or read book Design Rules for Actuators in Active Mechanical Systems written by Oriol Gomis-Bellmunt and published by Springer Science & Business Media. This book was released on 2009-10-29 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Design Rules for Actuators in Active Mechanical Systems" deals with the formulation of model-based design rules to be used in the conception of optimized mechatronic and adaptronic systems. The book addresses the comparison of different actuator classes for given applications and offers answers to the following questions: What is the relationship between actuator geometry and primary output quantities? How scalable are actuators based on the same principle? How are energetic output quantities (work and power) related to mechanical load and geometry? How should actuators be designed and sized to obtain the best performance for the chosen actuator kind, and for a given application? "Design Rules for Actuators in Active Mechanical Systems" will be of use to industry professionals, such as actuator and machine designers, as well as to researchers and students of mechanical engineering, mechatronics, and electrical engineering.
Author : H. A. Price
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (227 download)
Download or read book Mathematical Modeling by the Design Engineer written by H. A. Price and published by . This book was released on 1967 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper describes the type of model that is being developed for a hydraulic valve/actuator combination and discusses some fundamental characteristics of the dynamic operation of this type of hardware. Mathematical modeling presents the fluid power system design engineer with a simple and fairly accurate method for analytical simulations. A simulation of a hydraulic actuation system has resulted in performance which closely follows the performance of the actual hardware. A simplified version of this model was used to investigate the resonant-amplitude peak dispersion common to hydraulic systems. It was determined that this dispersion is primarily a function of the relative magnitudes between the cylinder and supply pressures. When the cylinder pressure is greater than the supply pressure, flow through the open valve ports is reversed thus lowering the cylinder pressure and reducing the resonant peak amplitude and frequency. (Author).
Author : A. L. Helinski
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (173 download)
Download or read book Hydraulic Control Design and Modeling Techniques written by A. L. Helinski and published by . This book was released on 1989 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report details the analysis of a hydraulic actuator system. The analysis consists of designing control compensation by means of deriving a frequency response from a non-linear mathematical model and using classical control theory. This hydraulic actuator system will be used on the Turret Motion Base Simulator (TMBS) which is a unique six degree of freedom simulator being developed. A considerable effort is being made to develop analytical models of laboratory simulators so that a complete assessment can be made before testing is conducted. Analytical studies may point to various problems with the system and control design considerations may be made early in the development stage. The results of selected command signals representing terrain profiles can be simulated with the analytical model before being applied to the actual system. As the level of complexity in laboratory testing is increased the more important becomes analytical studies. (JES).
Author : Mohamed Sultan Mohamed Ali
Publisher : Springer
ISBN 13 : 9811064636
Total Pages : 752 pages
Book Rating : 4.8/5 (11 download)
Download or read book Modeling, Design and Simulation of Systems written by Mohamed Sultan Mohamed Ali and published by Springer. This book was released on 2017-08-24 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume set CCIS 751 and CCIS 752 constitutes the proceedings of the 17th Asia Simulation Conference, AsiaSim 2017, held in Malacca, Malaysia, in August/September 2017. The 124 revised full papers presented in this two-volume set were carefully reviewed and selected from 267 submissions. The papers contained in these proceedings address challenging issues in modeling and simulation in various fields such as embedded systems; symbiotic simulation; agent-based simulation; parallel and distributed simulation; high performance computing; biomedical engineering; big data; energy, society and economics; medical processes; simulation language and software; visualization; virtual reality; modeling and Simulation for IoT; machine learning; as well as the fundamentals and applications of computing.
Author : Mukhtar Abdulsalam Irhouma
Publisher :
ISBN 13 :
Total Pages : 85 pages
Book Rating : 4.:/5 (96 download)
Download or read book Modeling and Controller Design for an Industrial Electro Hydraulic Actuator System written by Mukhtar Abdulsalam Irhouma and published by . This book was released on 2010 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anis Syarliza Ahmad
Publisher :
ISBN 13 :
Total Pages : 47 pages
Book Rating : 4.:/5 (953 download)
Download or read book Modeling, Simulation and Experimental Verification of Hydraulic Servo System written by Anis Syarliza Ahmad and published by . This book was released on 2013 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this project is to model, simulate and analyze the performance of the hydraulic servo system using MATLAB and Simulink. Experiments were conducted using open loop and closed loop control. In open loop control, the experiment was conducted for various speeds by supplying voltage to actuator from 5V to 10V. The open loop experimental data were used to determine the transfer function of the system. In closed loop control, the PI, PD and PID controllers were implemented in the hydraulic servo system and the desired positions were set to 30 mm, 50 mm and 70 mm. The results of the closed loop control showed that the PID controller produced better performance. The results also indicate that the transfer function model represented the actual system very well.
