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Author : Chi-Ying Liang
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.3/5 (91 download)
Download or read book Traffic-friendly Adaptive Cruise Control Design written by Chi-Ying Liang and published by . This book was released on 2000 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.3/5 (555 download)
Download or read book Adaptive Cruise Control System Design and Its Impact on Traffic Flow written by and published by . This book was released on 2005 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study resolves the controversy over the stability of constant time-gap policy for highway traffic flow. Previous studies left doubt as to the effectiveness of constant time-gap policies and whether they maintain stability in all traffic conditions. The results of this study prove that the constant time gap policy is in fact stable to a limit. At this limit, depending on the boundary conditions, conditions lose their stability. This study develops alternative ways to maintain the balance between safety and traffic flow for ACC vehicles that does not rely on constant time-gap policies. New spacing policies will create more stability, and therefore safer conditions, and allow for greater traffic capacity.
Author : Péter Gáspár
Publisher : Springer
ISBN 13 : 3030041166
Total Pages : 226 pages
Book Rating : 4.0/5 (3 download)
Download or read book Predictive Cruise Control for Road Vehicles Using Road and Traffic Information written by Péter Gáspár and published by Springer. This book was released on 2018-11-19 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the design of a multi-criteria automated vehicle longitudinal control system as an enhancement of the adaptive cruise control system. It analyses the effects of various parameters on the average traffic speed and the traction force of the vehicles in mixed traffic from a macroscopic point of view, and also demonstrates why research and development in speed control and predictive cruise control is important. The book also summarises the main steps of the system’s robust control design, from the modelling to its synthesis, and discusses both the theoretical background and the practical computation method of the control invariant sets. The book presents the analysis and verification of the system both in a simulation environment and under real-world conditions. By including the systematic design of the predictive cruise control using road and traffic information, it shows how optimization criteria can lead to multiobjective solutions, and the advanced optimization and control design methods required. The book focuses on a particular method by which the unfavourable effect of the traffic flow consideration can be reduced. It also includes simulation examples in which the speed design is performed, while the analysis is carried out in simulation and visualization environments. This book is a valuable reference for researchers and control engineers working on traffic control, vehicle control and control theory. It is also of interest to students and academics as it provides an overview of the strong interaction between the traffic flow and an individual vehicle cruising from both a microscopic and a macroscopic point of view.
Author : Rusli Huandra
Publisher :
ISBN 13 :
Total Pages : 192 pages
Book Rating : 4.:/5 (49 download)
Download or read book Intelligent Cruise Control Design Based on a Traffic Flow Specification written by Rusli Huandra and published by . This book was released on 1998 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : paul fancher, zevi bareket
Publisher :
ISBN 13 :
Total Pages : 47 pages
Book Rating : 4.L/5 (9 download)
Download or read book research on desirable adaptive cruise control behavior in traffic streams written by paul fancher, zevi bareket and published by . This book was released on 2003 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. Swaroop
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (411 download)
Download or read book Intelligent Cruise Control System Design Based on a Traffic Flow Specification written by D. Swaroop and published by . This book was released on 1999 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jianlong Zhang
Publisher :
ISBN 13 :
Total Pages : 78 pages
Book Rating : 4.:/5 (173 download)
Download or read book Integrated Roadway/adaptive Cruise Control System written by Jianlong Zhang and published by . This book was released on 2004 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this project, we design two new Adaptive Cruise Control (ACC) systems based on driver comfort, safety, vehicle following performance, environmental and traffic flow characteristics considerations. A new variable time headway rule is proposed and used to meet these considerations. Analysis and simulations are used to evaluate and compare the two designs. The first ACC system (referred to as ACC01) incorporates two controllers: one for speed tracking and one for vehicle following. The second ACC system (referred to as ACC02) treats the vehicle following task as a special speed tracking task and incorporates more intelligence in dealing with disturbance rejection, smooth response and safe vehicle following without affecting travel time. It provides better transient performance than ACC01, and can attenuate oscillations in the speed response of the preceding vehicle. It has also been shown that ACC02 provides better fuel economy and emission results than ACC01. The ACC02 design will be used for subsequent studies in a continuation project.
Author : Hermann Winner
Publisher : Springer
ISBN 13 : 9783319123516
Total Pages : 0 pages
Book Rating : 4.1/5 (235 download)
Download or read book Handbook of Driver Assistance Systems written by Hermann Winner and published by Springer. This book was released on 2015-10-15 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fundamental work explains in detail systems for active safety and driver assistance, considering both their structure and their function. These include the well-known standard systems such as Anti-lock braking system (ABS), Electronic Stability Control (ESC) or Adaptive Cruise Control (ACC). But it includes also new systems for protecting collisions protection, for changing the lane, or for convenient parking. The book aims at giving a complete picture focusing on the entire system. First, it describes the components which are necessary for assistance systems, such as sensors, actuators, mechatronic subsystems, and control elements. Then, it explains key features for the user-friendly design of human-machine interfaces between driver and assistance system. Finally, important characteristic features of driver assistance systems for particular vehicles are presented: Systems for commercial vehicles and motorcycles.
Author : L. C. Davis
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (631 download)
Download or read book Effect of Adaptive Cruise Control Systems on Traffic Flow written by L. C. Davis and published by . This book was released on 2004 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Subashri Vasudevan
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659239717
Total Pages : 56 pages
Book Rating : 4.2/5 (397 download)
Download or read book Design of Adaptive Cruise Controller written by Subashri Vasudevan and published by LAP Lambert Academic Publishing. This book was released on 2012 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main aim of the project is to design model based approach for Adaptive Cruise Control system which works efficiently under the STOP & GO scenarios. A significant number of accidents could be avoided through timely threat recognition and appropriate actions of collision avoidance. This may be achieved by suitable warning to the driver or by automatic support to longitudinal or lateral control of vehicle. The Adaptive Cruise Controller (ACC) is mainly a comforting system that helps in controlling the speed of the vehicle; at the same time it ensures the distance from the preceding vehicle is safer enough to avoid collision. But the driver remains responsible for steering. The speed can be decelerated/ accelerated in steps using the buttons available in the ACC. If deceleration of the ACC is not sufficient enough to avoid a collision, it warns the driver with a warning sound. All these are clearly drafted in the report and is presented with proper simulation results. Reader can go through the details and we are sure it would be a good reading.
Author : Dietrich E Wolf
Publisher : World Scientific
ISBN 13 : 9814547948
Total Pages : 394 pages
Book Rating : 4.8/5 (145 download)
Download or read book Traffic And Granular Flow written by Dietrich E Wolf and published by World Scientific. This book was released on 1996-04-30 with total page 394 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prediction of traffic (like weather forecast), its planning and control are counted among the great scientific and technological challenges. Similarly, flow of granular material like tablets or powders is of immense importance for industrial processing of solids. Both fields have intriguing conceptual analogies.From 9-11 October, 1995, the German Supercomputing Center HLRZ (Höchstleitungsrechenzentrum) at the research center Jülich (KFA) organized an international workshop 'Traffic and Granular Flow'. The purpose of this workshop was to promote the interaction between these two scientific fields, to which supercomputing is making essential contributions, and to stimulate the transfer between basic and applied research.
Author : Adem Ferad Idriz
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659783371
Total Pages : 152 pages
Book Rating : 4.7/5 (833 download)
Download or read book Adaptive Cruise Control with Auto-Steering for Autonomous Vehicles written by Adem Ferad Idriz and published by LAP Lambert Academic Publishing. This book was released on 2015-10-02 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wouldn't it be great if you could read a book or surf on internet etc. in driver's seat while traveling in your vehicle safely? One of the driver assistant systems currently under development by most automotive manufacturers is the Adaptive Cruise Control (ACC) system. The major drawback of commercially available ACC systems is the limited performance in cornering situations, where the road presents current/future curvatures. In particular, the interaction between longitudinal and lateral controller systems has not been deeply studied. This work proposes a multi-layer control structure to create synergies and safe interaction between longitudinal and lateral controllers in order to obtain both lateral stability and safe clearance of advanced autonomous driving vehicle. It mainly focuses on the design of an Integrated Vehicle Dynamics Control strategy for Adaptive Cruise Control with auto-steering application intended to decrease driver's workload. The results of simulations conducted in Matlab/Simulink have shown that the proposed integrated controller satisfies the performance in terms of autonomous driving, path tracking and collision avoidance for various traffic situations.
Author : Sanggyum Kim
Publisher :
ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (94 download)
Download or read book Design of the Adaptive Cruise Control Systems written by Sanggyum Kim and published by . This book was released on 2012 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern automobiles are equipped with various driver assistance functions which enhance safety and relieve driver fatigue. With the recent development of sensor technology, the Adaptive Cruise Control (ACC) system has been put into practice. This thesis investigates several aspects for the ACC system including (1) smooth reaction of the host vehicle to the cutting in and out of lead vehicles, (2) real-time optimal profile generation for stop-and-go motions, (3) optimal feedback controller design, and (4) extension to Cooperative Adaptive Cruise Control (CACC) systems. The ACC system should maintain an appropriate relative distance to the lead vehicle and should also maintain the desired speed set by the driver if there is no lead vehicle or if the speed of the lead vehicle is faster than the desired speed. Also, it should react smoothly when the lead vehicle cuts out or if a new lead vehicle cuts in from a side lane. This thesis introduces the virtual lead vehicle scheme to prevent the switching between the distance control and the speed control. By controlling the motion of the virtual lead vehicle to be smooth, the scheme could provide smooth reaction of the host vehicle to the cutting in and out of lead vehicles. Linear Quadratic (LQ) optimal control scheme is utilized to find the control gains for the virtual lead vehicle and the host vehicle. Variable weights are utilized in LQ for the virtual lead vehicle. With the variable weights, the motion of the virtual lead vehicle is controlled to be smooth when there is no safety threat while ensuring that the virtual lead vehicel is still responsive and fast when a dangerous situation occurs. ACC with Stop-and-Go and the Cooperative Adaptive Cruise Control (CACC) system are extensions of the conventional ACC system. Stop-and-Go system is targeted to be used in urban driving situation where the lead vehicle can stop completely. In that case, the Stop-and-Go system should have a capability to stop the host vehicle completely. The constant time-headway policy used to find the appropriate relative distance causes undesirable motion for a complete stop. In this thesis a sliding controller is utilized to control the complete stopping motion. To find the optimal stopping trajectory, a constrained Quadratic Programming (QP) problem is solved. A constrained QP is also used to find the optimal velocity profile when the stopped vehicle is to resume motion. Multi-resolution formulations and the Lemke algorithm are utilized to find the optimal trajectories in real time. The CACC system utilizes wireless communication so that the vehicles in the network can share information with other vehicles. In this thesis, a centralized controller is designed by LQ optimal control scheme and potential benefits and problems are addressed. A Kalman filter with variable measurement noise covariance is introduced to compensate the lost data through the wireless network associated with the CACC system. The proposed control schemes have been verified through simulations.
Author : Zeeshan Ali
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (16 download)
Download or read book Transitional Controller Design for Adaptive Cruise Control Systems written by Zeeshan Ali and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic congestion is an important reason for driver frustration which in turn is the main cause of human errors and accidents. Statistics reports have shown that over 90% of accidents are caused by human errors. Therefore, it is vital to improve vehicle controls to ensure adequate safety measures in order to decrease the number of accidents or to reduce the impact of accidents. An application of mathematical control techniques to the longitudinal dynamics of a vehicle equipped with an adaptive cruise control (ACC) system is presented. This study is carried out for the detailed understanding of a complex ACC vehicle model under critical transitional manoeuvres (TMs) in order to establish safe inter-vehicle distance with zero range-rate (relative velocity) behind a preceding vehicle. TMs are performed under the influence of internal complexities from vehicle dynamics and within constrained operation boundaries. The constrained boundaries refer to the control input, states, and collision avoidance constraints. The ACC vehicle is based on a nonlinear longitudinal model that includes vehicle inertial and powertrain dynamics. The overall system modelling includes: complex vehicle models, engine maps construction, first-order vehicle modelling, controllers modelling (upper-level and lower-level controllers for ACC vehicles). The upper-level controller computes the desired acceleration commands for the lower-lever controller which then provides the throttle/brake commands for the complex vehicle model. An important aspect of this study is to compare four control strategies: proportional-integral-derivative; sliding mode; constant-time-gap; and, model predictive control for the upper-level controller analysis using a first-order ACC vehicle model. The first-order model represents the lags in the vehicle actuators and sensor signal processing and it does not consider the dynamic effects of the vehicle's sub-models. Furthermore, parameter analyses on the complex ACC vehicle for controller and vehicle parameters have been conducted. The comparison analysis of the four control strategies shows that model predictive control (MPC) is the most appropriate control strategy for upper-level control because it solves the optimal control problem on-line, rather than off-line, for the current states of the system using the prediction model, at the same time being able to take into account operation constraints. The analysis shows that the complex ACC vehicle can successfully execute TMs, tracking closely the desired acceleration and obeying the constraints, whereas the constraints are only applied in the MPC controller formulation. It is found that a higher length of the prediction horizon should be used for a closed acceleration tracking. The effect of engine and transmission dynamics on the MPC controller and ACC vehicle performance during the gear shifting is studied. A sensitivity analysis for MPC controller and vehicle parameters indicates that a length of the control horizon that is too high can seriously disturb the vehicle behaviour, and this disturbance can be only removed if a higher value of control input cost weighting is used. Furthermore, the analysis indicates that a mass within the range of 1400-2000 kg is suitable for the considered ACC vehicle. It is recommended that a variable headway time should be used for the spacing control between the two vehicles. It is found that the vehicle response is highly sensitive to the control input cost weighting; a lower value (less than one) can lead to a highly unstable vehicle response. It is recommended that the lower-level controller must take into account the road gradient information because the complex ACC vehicle is unable to achieve the control objectives while following on a slope. Based on the results, it is concluded that a first-order ACC vehicle model can be used for the controller design, but it is not sufficient to capture the complex vehicle dynamic response. Therefore, a complex vehicle model should be of use for the detailed ACC vehicle analysis. In this research study the first-order ACC vehicle model is used for the complex vehicle validation, whereas the complex ACC vehicle model can be used for the experimental validation in future work.
Author : J. Zhou
Publisher :
ISBN 13 :
Total Pages : 9 pages
Book Rating : 4.:/5 (631 download)
Download or read book Range Policy of Adaptive Cruise Control Vehicles for Improved Flow Stability and String Stability written by J. Zhou and published by . This book was released on 2005 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: A methodology to design the range policy of adaptive cruise control vehicles and its companion servoloop control algorithm is presented in this paper. A nonlinear range policy for improved traffic flow stability and string stability is proposed and its performance is compared against the constant time headway policy, the range policy employed by human drivers, and the Greenshields policy. The proposed range policy is obtained through an optimization procedure with traffic flow and stability constraints. A complementary controller is then designed based on the sliding mode technique. Microscopic simulation results show that stable traffic flow is achieved by the proposed method up to a significantly higher traffic density.
Author : J. Wang
Publisher :
ISBN 13 :
Total Pages : 20 pages
Book Rating : 4.:/5 (631 download)
Download or read book The Impact of Adaptive Cruise Control Systems on Highway Safety and Traffic Flow written by J. Wang and published by . This book was released on 2004 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Azim Eskandarian
Publisher : Springer
ISBN 13 : 9780857290847
Total Pages : 0 pages
Book Rating : 4.2/5 (98 download)
Download or read book Handbook of Intelligent Vehicles written by Azim Eskandarian and published by Springer. This book was released on 2012-02-26 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Intelligent Vehicles provides a complete coverage of the fundamentals, new technologies, and sub-areas essential to the development of intelligent vehicles; it also includes advances made to date, challenges, and future trends. Significant strides in the field have been made to date; however, so far there has been no single book or volume which captures these advances in a comprehensive format, addressing all essential components and subspecialties of intelligent vehicles, as this book does. Since the intended users are engineering practitioners, as well as researchers and graduate students, the book chapters do not only cover fundamentals, methods, and algorithms but also include how software/hardware are implemented, and demonstrate the advances along with their present challenges. Research at both component and systems levels are required to advance the functionality of intelligent vehicles. This volume covers both of these aspects in addition to the fundamentals listed above.
