Digital Hydraulic Actuator Study
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Digital Hydraulic Actuator Study
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Author :
language : en
Publisher:
Release Date : 1966
Digital Hydraulic Actuator Study written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
To further support the practicability of the digital hydraulic actuator as a control component, IBM has successfully demonstrated operation of the Phase III laboratory model in a simulated digital flight control system. Performance using the laboratory model is compared with the performance when using a mathematical model. Recorded transients and the values obtained for a maximum stable step and gain change are presented. The effect of varying the actuator parameters and the validity of a linearized model is also established. Agreement of the results shows the mathematical model to accurately represent the actual hardware. Hence, this study verified the results of both Phase I and Phase II.
On Motion Control Of Linear Incremental Hydraulic Actuators
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Author : Martin Hochwallner
language : en
Publisher: Linköping University Electronic Press
Release Date : 2017-10-24
On Motion Control Of Linear Incremental Hydraulic Actuators written by Martin Hochwallner and has been published by Linköping University Electronic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-24 with categories.
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.
Digital Algorithm For Hydraulic Actuator
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Author : Makoto Uriuhara
language : en
Publisher:
Release Date : 1986
Digital Algorithm For Hydraulic Actuator written by Makoto Uriuhara and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with Actuators categories.
Digital Flight Control Actuation System Study
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Author :
language : en
Publisher:
Release Date : 1974
Digital Flight Control Actuation System Study written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with categories.
A Study Of The Stability Of A Hydraulic Actuator System
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Author : Paul A. Stoelting
language : en
Publisher:
Release Date : 1999
A Study Of The Stability Of A Hydraulic Actuator System written by Paul A. Stoelting and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Actuators categories.
Direct Digital Control Of A Servo Controlled Hydraulic Actuator
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Author : Malcolm Reeson
language : en
Publisher:
Release Date : 1989
Direct Digital Control Of A Servo Controlled Hydraulic Actuator written by Malcolm Reeson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Digital control systems categories.
Hydraulic Control Systems
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Author : Noah D. Manring
language : en
Publisher: John Wiley & Sons
Release Date : 2019-09-24
Hydraulic Control Systems written by Noah D. Manring and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-24 with Technology & Engineering categories.
Provides key updates to a must-have text on hydraulic control systems This fully updated, second edition offers students and professionals a reliable and comprehensive guide to the hows and whys of today's hydraulic control system fundamentals. Complete with insightful industry examples, it features the latest coverage of modeling and control systems with a widely accepted approach to systems design. The book also offers all new information on: advanced control topics; auxiliary components (reservoirs, accumulators, coolers, filters); hybrid transmissions; multi-circuit systems; and digital hydraulics. Chapters in Hydraulic Control Systems, 2nd Edition cover; fluid properties; fluid mechanics; dynamic systems and control; hydraulic valves, pumps, and actuators; auxiliary components; and both valve and pump controlled hydraulic systems. The book presents illustrative case studies throughout that highlight important topics and demonstrate how equations can be implemented and used in the real world. It also features end-of-chapter exercises to help facilitate learning. It is a powerful tool for developing a solid understanding of hydraulic control systems that will serve all practicing engineers in the field. Provides a useful review of fluid mechanics and system dynamics Offers thorough analysis of transient fluid flow forces within valves Adds all new information on: advanced control topics; auxiliary components; hybrid transmissions; multi-circuit systems; and digital hydraulics Discusses flow ripple for both gear pumps and axial piston pumps Presents updated analysis of the pump control problems associated with swash plate type machines Showcases a successful methodology for hydraulic system design Features reduced-order models and PID controllers showing control objectives of position, velocity, and effort Hydraulic Control Systems, 2nd Edition is an important book for undergraduate and first-year graduate students taking courses in fluid power. It is also an excellent resource for practicing engineers in the field of fluid power.
Research And Demonstration Of A Digital Flight Control System Electro Hydraulic Servo Control Valve Actuator Experimental Model
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Author : D. S. Seidel
language : en
Publisher:
Release Date : 1964
Research And Demonstration Of A Digital Flight Control System Electro Hydraulic Servo Control Valve Actuator Experimental Model written by D. S. Seidel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1964 with categories.
This report discusses the applicability of various electrohydraulic servo valve (and servo actuator) configurations for use in digital flight control systems. The research and de velopmental effort was conducted in five phases: Initial research and analysis, interface study, choice of experimental model configuration, experimental model design analysis, and experimental model physical design and evaluation. During the initial research and analysis phase, three servo actuator configurations capable of response to serial digital information and one servo actuator configuration capable of response to parallel digital information were investigated. The configurations responsive to serial digital information were termed incremental servo actuators and operated essentially in a bangbang mode during each actuation cycle. The configurations responsive to parallel digital information were termed parallel binary servo actuators (PBSA). The PBSA configuration discussed in this report is an analog servo actuator configuration utilizing a multicoil torque motor for binary weighting and summation operations. (Author).
A General Purpose Digital Controller For Hydraulic Actuator Systems
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Author : M.D. Haller
language : en
Publisher:
Release Date : 1984
A General Purpose Digital Controller For Hydraulic Actuator Systems written by M.D. Haller and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with categories.
Nonlinear Control Techniques For Electro Hydraulic Actuators In Robotics Engineering
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Author : Qing Guo
language : en
Publisher: CRC Press
Release Date : 2017-08-14
Nonlinear Control Techniques For Electro Hydraulic Actuators In Robotics Engineering written by Qing Guo and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-14 with Technology & Engineering categories.
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.