Development Of Computerized Active Vehicle Suspensions
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Development Of Computerized Active Vehicle Suspensions
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Author : Herbert K. Sachs
language : en
Publisher:
Release Date : 1976
Development Of Computerized Active Vehicle Suspensions written by Herbert K. Sachs and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with categories.
An active, computerized, adaptive control system is discussed for the control of vehicle vibrations by means of adjustment of suspension parameters during the ride. The problem is subdivided into two basic parts. One, optimization of vehicle suspension parameters if forward speed, terrain statistics and vehicle descriptors are known a-priori. This information is developed off board and stored on board in the computer memory. Two, methods of evaluating terrain data received from sensors on board the vehicle and subsequently processing it for comparison with the stored data contained in the memory. Methods of signaling the selection of best parameters by means of amplifiers, solenoids and valves to the suspension system (Conceptual design). The use of fluid suspension elements is shown to permit automatic height control (static deflection control relative to payload) together with dynamic deflection control based on root mean square values of the input displacements. The theoretical problem treatment refers to linear suspension systems subject to random inputs. Included is an analog computer program and results of trial runs. (Author).
Development Of An Experimental Active Suspension System
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Author :
language : en
Publisher:
Release Date : 1994
Development Of An Experimental Active Suspension System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
The work summarized in this report was aimed at developing an experimental active suspension system for a quarter-ton rubber-tired vehicle, the Iltis. The work was an attempt to produce a system which has the flexibility to reproduce the action of a variety of commercial active suspension systems. In this way, their ability to control the ride quality of the Iltis could be compared objectively through full-scale testing. Aspects of the work included a review of the state of the art as found in the literature, developing a conceptual design, laboratory testing, installation on the vehicle, field tests, and computer simulation of active suspension systems.
The Dynamics Of Vehicles On Roads And On Tracks
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Author : Willumeit
language : en
Publisher: Routledge
Release Date : 2018-05-08
The Dynamics Of Vehicles On Roads And On Tracks written by Willumeit and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-08 with Technology & Engineering categories.
First published in 1980. CRC Press is an imprint of Taylor & Francis.
The Development Of Active Vehicle Suspension Systems
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Author : R. J. Aird
language : en
Publisher:
Release Date : 1972
The Development Of Active Vehicle Suspension Systems written by R. J. Aird and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.
Development Of A Semi Active Intelligent Suspension System For Heavy Vehicles
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Author : Nima Eslaminasab
language : en
Publisher:
Release Date : 2008
Development Of A Semi Active Intelligent Suspension System For Heavy Vehicles written by Nima Eslaminasab and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
With the new advancements in the vibration control strategies and controllable actuator manufacturing, the semi-active actuators (dampers) are finding their way as an essential part of vibration isolators, particularly in vehicle suspension systems. This is attributed to the fact that in a semi-active system, the damping coefficients can be adjusted to improve ride comfort and road handling performances. The currently available semi-active damper technologies can be divided into two main groups. The first uses controllable electromagnetic valves. The second uses magnetorheological (MR) fluid to control the damping characteristics of the system. Leading automotive companies such as General Motors and Volvo have started to use semi-active actuators in the suspension systems of high-end automobiles, such as the Cadillac Seville and Corvette, to improve the handling and ride performance in the vehicle. But much more research and development is needed in design, fabrication, and control of semi-active suspension systems and many challenges must be overcome in this area. Particularly in the area of heavy vehicle systems, such as light armored vehicles, little related research has been done, and there exists no commercially available controllable damper suitable for the relatively high force and large displacement requirements of such application. As the first response to these requirements, this thesis describes the design and modeling of an in-house semi-active twin-tube shock absorber with an internal variable solenoid-actuated valve. A full-scale semi-active damper prototype is developed and the shock absorber is tested to produce the required forcing range. The test results are compared with results of the developed mathematical model. To gain a better understanding of the semi-active suspension controlled systems and evaluate the performance of those systems, using perturbation techniques this thesis provides a detailed nonlinear analysis of the semi-active systems and establishes the issue of nonlinearity in on-off semi-active controlled systems. Despite different semi-active control methods and the type of actuators used in a semi-active controlled system, one important practical aspect of all hydro-mechanical computer controlled systems is the response-time. The longest response-time is usually introduced by the actuator -in this case, controllable actuator - in the system. This study investigates the effect of response-time in a semi-active controlled suspension system using semi-active dampers. Numerical simulations and analytical techniques are deployed to investigate the issue. The performance of the system due to the response-time is then analyzed and discussed. Since the introduction of the semi-active control strategy, the challenge was to develop methods to effectively use the capabilities of semi-active devices. In this thesis, two semi-active control strategies are proposed. The first controller to be proposed is a new hybrid semi-active control strategy based on the conventional Rakheja-Sankar (R-S) semi-active control to provide better ride-handling quality for vehicle suspension systems as well as industrial vibration isolators. To demonstrate the effectiveness of this new strategy, the analytical method of averaging and the numerical analysis method are deployed. In addition, a one-degree-of-freedom test bed equipped with a semi-active magnetorheological (MR) damper is developed. The tests are performed using the MATLAB XPC-target to guarantee the real-time implementation of the control algorithm. The second controller is an intelligent fuzzy logic controller system to optimize the suspension performance. The results from this intelligent system are compared with those of several renowned suspension control methods such as Skyhook. It is shown that the proposed controller can enhance concurrently the vehicle handling and ride comfort, while consuming less energy than existing control methodologies. The key goal of this thesis is to employ the existing knowledge of the semi-active systems together with the new ideas to develop a semi-active suspension system. At the same time, development of an experimental simulation system for real-time control of an experimental test bed is considered. To achieve its goals and objectives, this research study combines and utilizes the numerical simulations and analytical methods, as well as lab-based experimental works. The challenge in this research study is to identify practical and industrial problems and develop proper solutions to those problems using viable scientific approaches.
Vehicle Suspension System Technology And Design
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Author : Avesta Goodarzi
language : en
Publisher: Springer Nature
Release Date : 2023-02-13
Vehicle Suspension System Technology And Design written by Avesta Goodarzi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2023-02-13 with Technology & Engineering categories.
This book describes the procedures of developing an adaptive suspension system with examples. This book gives a thorough introduction to air suspension systems, which contain height leveling systems, electronic control systems, design fundamentals, performance superiority, etc. This book encompasses all essential aspects of suspension systems and provides an easy approach to their understanding and design. Provides a step-by-step approach using pictures, graphs, tables, and examples so that the reader may easily grasp difficult concepts. This book defines and examines suspension mechanisms and their geometrical features. Suspension motions and ride models are derived for the study of vehicle ride comfort. Analysis of suspension design factors and component sizing along with air suspension systems and their functionalities are reviewed.
Scientific And Technical Aerospace Reports
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Author :
language : en
Publisher:
Release Date : 1977
Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Aeronautics categories.
Semi Active Suspension Control
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Author : Emanuele Guglielmino
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-05-27
Semi Active Suspension Control written by Emanuele Guglielmino and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-05-27 with Technology & Engineering categories.
Semi-active Suspension Control provides an overview of vehicle ride control employing smart semi-active damping systems. These systems are able to tune the amount of damping in response to measured vehicle-ride and handling indicators. Two physically different dampers (magnetorheological and controlled-friction) are analysed from the perspectives of mechatronics and control. Ride comfort, road holding, road damage and human-body modelling are studied. Mathematical modelling is balanced by a large and detailed section on experimental implementation, where a variety of automotive applications are described offering a well-rounded view. The implementation of control algorithms with regard to real-life engineering constraints is emphasised. The applications described include semi-active suspensions for a saloon car, seat suspensions for vehicles not equipped with a primary suspension, and control of heavy-vehicle dynamic-tyre loads to reduce road damage and improve handling.
Development Of A Preview Control System For The Dres Active Suspension Research Vehicle
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Author :
language : en
Publisher:
Release Date : 1995
Development Of A Preview Control System For The Dres Active Suspension Research Vehicle written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
This document summarizes work carried out to develop a preview control system capable of determining the profile of the ground ahead of the Canadian Forces Iltis utility vehicle and feeding this information back to the active suspension system in order to improve its ability to enhance vehicle ride and handling performance. Work included a literature review, preview system development, design and procurement, computer simulation and control scheme development, installation, and testing. Details of the system are described in companion reports which are referred to in the body of this report.
Quarter Car Active Suspension System Design Using Optimal And Robust Control Method
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Author : Mustefa Jibril
language : en
Publisher: GRIN Verlag
Release Date : 2020-05-11
Quarter Car Active Suspension System Design Using Optimal And Robust Control Method written by Mustefa Jibril and has been published by GRIN Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-11 with Computers categories.
Research Paper (undergraduate) from the year 2020 in the subject Computer Science - Miscellaneous, , language: English, abstract: This paper offers with the theoretical and computational evaluation of optimal & robust control problems, with the goal of providing answers to them with MATLAB simulation. For the robust control, μ-synthesis controller and for the optimal control, LQR controller are designed for a quarter car active suspension system to maximize the ride comfort and road handling criteria’s of the vehicle. The proposed controllers are designed using Matlab script program using time domain analysis for the four road disturbances (bump, random sine pavement and white noise) for the control targets suspension deflection, body acceleration and body travel. Finally the simulation result prove the effectiveness of the active suspension system with μ-synthesis controller.