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Parallel Design Optimization Of Multi Trailer Articulated Heavy Vehicles With Active Safety Systems
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Book Synopsis Parallel Design Optimization of Multi-trailer Articulated Heavy Vehicles with Active Safety Systems by : Md. Manjurul Islam
Download or read book Parallel Design Optimization of Multi-trailer Articulated Heavy Vehicles with Active Safety Systems written by Md. Manjurul Islam and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Coordinated Control of Active Safety Systems for Multi-trailer Articulated Heavy Vehicles by : Shenjin Zhu
Download or read book Coordinated Control of Active Safety Systems for Multi-trailer Articulated Heavy Vehicles written by Shenjin Zhu and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: To improve the directional performance of multitrailer articulated heavy vehicles (MTAHVs), the model-based active safety systems, including the active trailer steering, trailer differential braking and the active roll control are developed. The active safety systems are integrated and coordinated for optimal overall performance. The coordinated control system is designed in a modular, hierarchical and multilevel approach. At the upper level, a moment controller is designed to stabilize the yaw and the roll dynamics. At the intermediate level, an allocator is designed to distribute the demanded moments to the actuating systems. At the lower level, the active suspension system realizes the demanded roll moment, and the active trailer steering and the trailer differential braking share the demanded yaw moment. The directional performance of the MTAHV with the coordinated control system is evaluated in closed-loop simulations. A unified driver model for road vehicles is developed to 'drive' the vehicle in the closed-loop simulations. Considering the characteristics of the single unit and the multiunit vehicle drivers, a set of design parameters are introduced to govern the characteristics of the driver model to mimic human drivers in driving single unit and multiunit road vehicles, especially to simulate MTAHV drivers' driving performance under a high-speed evasive and a low-speed path-following maneuvers, respectively. The directional performance of the MTAHV with the coordinated control system and the driver model may be valuated and optimized using a genetic algorithm with the performance measures in the time-domain and the frequency-domain, thanks to the introduction of the automated frequency response measuring method (AFRM) into the articulated heavy vehicle dynamics. The proposed design methods/techniques and findings derived from the research will contribute to the advancement of active safety systems for MTAHVs.
Book Synopsis Design Synthesis of Articulated Heavy Vehicles with Active Trailer Steering Systems by : Md. Manjurul Islam
Download or read book Design Synthesis of Articulated Heavy Vehicles with Active Trailer Steering Systems written by Md. Manjurul Islam and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Dynamics of Vehicles on Roads and Tracks II by : Anna Orlova
Download or read book Advances in Dynamics of Vehicles on Roads and Tracks II written by Anna Orlova and published by Springer Nature. This book was released on 2022-08-08 with total page 1274 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a snapshot of the latest research and developments in road and railway vehicle dynamics. Gathering peer-reviewed contributions to the 27th Symposium of the International Association of Vehicle System Dynamics (IAVSD), held online on August 17–19, 2021, from Saint Petersburg, Russia, it offers extensive information for both researchers and professionals in the field of ground vehicle dynamics, control and design. It covers cutting-edge methods and solutions for solving ground vehicle system dynamics-related problems, concerning control and monitoring, performance, safety and braking of road and rail vehicles, including electric and autonomous ones. Further, it reports on significant advances in vehicle design, and important applications to improve ride comfort. Overall, the book provides academics and professional with a timely reference guide on theories and methods to understand, analyze and improve vehicle stability and dynamics in a broad range of different operating conditions. Chapter "Experimental Validation of a Semi-physical Modelling Approach of the Influence of Tyre Rotation on the Vertical Tyre Force Transmission and Tyre Kinematics" is available open access under a Creative Commons Attribution 4.0 International License via link.springer.com.
Book Synopsis Fault Tolerant Control of Active Trailer Steering Systems for Multi-trailer Articulated Heavy Vehicles by : Saurabh Kapoor
Download or read book Fault Tolerant Control of Active Trailer Steering Systems for Multi-trailer Articulated Heavy Vehicles written by Saurabh Kapoor and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faults in a controlled plant often deteriorate the system performance. In severe cases, faults pose a risk of component damage, plant shutdown or even personnel safety. Fault Tolerant Control (FTC) aims at preventing the escalation of rectifiable faults to serious failure. A FTC system combines fault diagnosis with reconfiguration methods to manage faults intelligently. This thesis focuses on FTC systems for Multi-Trailer Articulated Heavy Vehicles (MTAHVs), particularly for Active Trailer Steering (ATS) systems. MTAHVs are vital to the trucking industry, and it is crucial to enhance their safety, reliability and usability. In this research, a 4-DOF linear yaw-plane model of a B-Train double is generated. The vehicle model is validated using the commercial software package, TruckSim. Additionally, this thesis presents an ATS system for the B-Train double. The ATS mechanism is modeled as a hydraulic control system, consisting of a hydraulic actuator and an electrohydraulic control valve. The hydraulics for the ATS system are validated using MathWorks Simscape. To enhance the hydraulic control system's robustness and reliability, FTC is applied. Numerous model-based fault diagnosis techniques such as Kalman Filter, Luenberger Observer, parity equations and residual generation are employed. Furthermore, for the control system synthesis, Linear Quadratic Regulator (LQR) and H∞ control techniques are utilized. Control techniques' influence on FTC is analyzed, and the most appropriate technique is proposed for the FTC-ATS control system. Several fault scenarios, such as actuator malfunction(s) and sensor failure are explored, and their impact on system dynamics is investigated.
Book Synopsis Design and Validation of Active Trailer Steering Systems for Articulated Heavy Vehicles Using Driver-hardware-in-the-loop Real-time Simulation by : Qiushi Wang
Download or read book Design and Validation of Active Trailer Steering Systems for Articulated Heavy Vehicles Using Driver-hardware-in-the-loop Real-time Simulation written by Qiushi Wang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhancing Roll Stability and Directional Performance of Articulated Heavy Vehicles Based on Anti-roll Control and Design Optimization by : Dhruv Oberoi
Download or read book Enhancing Roll Stability and Directional Performance of Articulated Heavy Vehicles Based on Anti-roll Control and Design Optimization written by Dhruv Oberoi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design and Validation of High Speed Active Trailer Steering System for Articulated Heavy Vehicle by : Zhituo Ni
Download or read book Design and Validation of High Speed Active Trailer Steering System for Articulated Heavy Vehicle written by Zhituo Ni and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Articulated heavy duty vehicles are widely used around the world for its economic and environmental benefits. A-train double is one of the most popular heavy duty vehicles in Canada. Despite its advantages, the spread of A-train is hampered by poor lateral dynamic performance and poor accident avoid ability in highway resulted from its special structure. In order to evaluate the lateral dynamic performance of the A-train double at highway speed, ISO standards have proposed the rearward amplification (RA) measures to characterizing the performance. It has been reported that the RA curves obtained through three different methods proposed by ISO-14791 differ. This thesis studies three proposed methods in detail and analyzes the contributing causes for the inconsistency among three test maneuvers based on A-train double. In order to increase the lateral stability of the A-train double, Active steering systems (ATS) have been designed through two methods: robust LQR-LMI method with genetic algorithm (GA) optimization and H∞ method. The designed controllers are validated by numerical simulation and hardware in-loop simulation. The ATS designed from two methods show good robust stability and improve the lateral dynamic performance of A-train double dramatically at highway speed.
Book Synopsis Multi-criteria, Multi-scenario Design Optimization of Heavy Vehicles by : Srinath Chakravartula
Download or read book Multi-criteria, Multi-scenario Design Optimization of Heavy Vehicles written by Srinath Chakravartula and published by . This book was released on 2001 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Active Trailer Steering Systems for Pickup Truck-trailer Combinations by : Priya Shastry
Download or read book Development of Active Trailer Steering Systems for Pickup Truck-trailer Combinations written by Priya Shastry and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lateral dynamics of articulated vehicles continue to remain a subject of concern in the design of safety systems. Vehicle-trailer combinations tend to exhibit low lateral stability and poor maneuverability, especially under high-speed maneuvers, which lead to unstable motion modes such as jackknifing, trailer sway and rollover. Active safety systems such as Active Trailer Steering (ATS) have been widely studied to address these issues and ensure the safety of combination vehicles. Linear Quadratic Regulator (LQR) is a popular control technique to design ATS systems. Although this technique has demonstrated consistent results, this controller is not effective in the presence of parametric uncertainties. Therefore, a robust control strategy is proposed to improve the overall dynamic performance of the system. This research focuses on designing an ATS system for pickup truck and tandem-axle trailer combinations using the LQR and robust H-infinity (H1) control techniques. Numerical simulations are carried out using TruckSim and MATLAB/Simulink software packages, and the results are analyzed under high-speed performance measures.
Book Synopsis High-speed Lateral Stability Analysis of Articulated Heavy Vehicles Using Driver-in-the-loop Real Time Simulation by : Jesse Brown
Download or read book High-speed Lateral Stability Analysis of Articulated Heavy Vehicles Using Driver-in-the-loop Real Time Simulation written by Jesse Brown and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-speed testing procedures for evaluating the lateral stability of multi-trailer articulated heavy vehicles (MTAHV) include the use of both an open-loop and a closed-loop maneuvers as specified in ISO-14791. The standard testing procedures are used to determine the Rearward Amplification (RA), which is a well-accepted performance measure for the lateral stability of MTAHVs. The open-loop testing maneuver includes the use of a single cycle sinewave steer input, while the closed-loop procedure prescribes a single lane-change path, following which a driver drives a testing vehicle. The closed-loop single lane-change maneuver can be performed by a human driver for in-vehicle tests. In numerical simulation, a driver model may be used to drive the virtual vehicle under the closed-loop maneuver for simplicity and repeatability. Very little attention has been paid to investigating into the interactions of driver-MTAHV. It has been reported that a driver is typically at fault in many heavy vehicle accidents, and many studies focus on improving the dynamic performance of the vehicle and ignore the driving skills of the driver. This thesis attempts to examine the driver-MTAHV interactions and quantify driver skills for controlling a MTAHV as compared to a single unit vehicle. This thesis proposes a method for driver skill analysis via comparing virtual drivers in various operating conditions. The driver skill analysis is conducted by evaluating the lateral stability and path-following ability of the vehicle under the control of the driver model. The evaluation is implemented using driver-in-the-loop (DIL) real-time simulations, where the RA measures derived from a group of human drivers are compared to those from the virtual driver. The numerical and DIL real-time simulation results demonstrate that the human and the virtual driver achieved similar a good agreement in terms of the performance measures, indicating the validity of the driver model, testing procedure and the interactions of driver-MTAHV.
Book Synopsis Multi-axle Vehicle Modeling and Stability Control by : Yubiao Zhang
Download or read book Multi-axle Vehicle Modeling and Stability Control written by Yubiao Zhang and published by . This book was released on 2019 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multi-axle vehicles, such as trucks and buses, have been playing a vital role in trucking industry, public transportation system, and long-distance transport services. However, at the same time, statistics suggest more than one million lives are lost in road accidents each year over the world. The high adoption and utilization of multi-axle vehicles hold a significant portion of road accidents and death. To improve the active safety of vehicles, active systems have been developed and commercialized over the last decades to augment the driver's actions. However, unlike two-axle vehicles (e.g., passenger cars), multi-axle vehicles come in a rich diversity and variety to meet with many different transportation needs. Specifically, vehicle configurations are seen in different numbers of axles, numbers of articulations, powertrain modes, and active actuation systems. In addition, multi-axle vehicles are usually articulated, which makes the dynamics and control more complex and challenging as more instability modes appear, such as, trailer sway and jackknife. This research is hence motivated by an essential question: how can a universal and reconfigurable control system be developed for any multi-axle/articulated vehicle with any configuration? Leveraging the matrix approach and optimization-based techniques, this thesis developed a reconfigurable and universal modeling and control framework to this aim. Specifically, a general dynamics modeling that unifies any multi-axle and articulated vehicles in one formulation is developed in an intuitive manner. It defines the `Boolean Matrices' to determine any configuration of the articulation, the number of axles, and the active actuation systems. In this way, the corresponding dynamics model can be easily and quickly formulated when axles, articulations or actuators are added or removed. The general modeling serves to achieve the universality and reconfigurability in controller design. Therefore, a hierarchical, i.e., two-layer, control system is proposed. In the high layer, the optimization process of a model predictive control (MPC) calculates corrective Center of Gravity (CG) forces/moments, which are universal to any vehicle. The lower-level controller is achieved by a Control Allocation (CA) algorithm. It aims to realize the MPC commands by regulating the steering or torque (driving or braking) at each wheel optimally. In addition, the optimization takes into account real-time constraints, such as actuator limits, tire capacity, wheel slips, and actuators failure. Simulations are conducted on different vehicle configurations to evaluate control performance, reconfigurability, and robustness of the system. Additionally, to evaluate the real-time performance of the developed controller, experimental validation is carried out on an articulated vehicle with multiple configurations of differential braking systems. It is observed that the controller is very effective in dynamics control and has a promising reconfigurability when moving from one configuration to another.
Book Synopsis Design Synthesis of Car-trailer Systems with Active Trailer Differential Braking Strategies by : Tao Sun
Download or read book Design Synthesis of Car-trailer Systems with Active Trailer Differential Braking Strategies written by Tao Sun and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Active Trailer Steering Systems for Long Combination Vehicles Using Robust Control Techniques by : Tushita Sikder
Download or read book Design of Active Trailer Steering Systems for Long Combination Vehicles Using Robust Control Techniques written by Tushita Sikder and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The exponential growth in freightage and the ever-increasing traffic congestion has aided Long Combination Vehicles (LCVs) to emerge as an economical and pragmatic solution for freight transport compared to single unit vehicles. Despite their numerous merits, LCVs face certain stability challenges at high speeds and exhibit inferior maneuverability at low speeds. LCVs are especially susceptible to unstable motion modes, such as rollover, jack-knifing and trailer sway, which has escalated strong concerns regarding their safety. Therefore, it is imperative to develop safety systems with a focus on improving stability, and ensuring safety of LCVs. Active safety systems such as Active Trailer Steering (ATS), have been widely explored to overcome these stability challenges. So far, the design of ATS systems have utilised the Linear Quadratic Regulator (LQR) control technique. Although the LQR technique provides satisfactory results, it fails to control the system in presence of external disturbances such as sensor noise, parametric uncertainties, and un-modelled dynamics. This encourages the need of a robust control strategy. This research focuses on developing an ATS system for a B-train double using robust control techniques. The robust Linear Quadratic Gaussian (LQG) and the [...] synthesis control techniques are employed for designing the ATS control system. The control techniques are analysed under a variety of tests by using numerical simulations. TruckSim and MATLAB/Simulink software packages are used for numerical simulations. The results suggest that the LQG control technique effectively controls the system in the presence of noise, whereas the [...] synthesis control technique is able to achieve desired system performance in the presence of noise, and parametric uncertainties.
Book Synopsis Advances in Dynamics of Vehicles on Roads and Tracks by : Matthijs Klomp
Download or read book Advances in Dynamics of Vehicles on Roads and Tracks written by Matthijs Klomp and published by Springer Nature. This book was released on 2020-02-14 with total page 1917 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers together papers presented at the 26th IAVSD Symposium on Dynamics of Vehicles on Roads and Tracks, held on August 12 – 16, 2019, at the Lindholmen Conference Centre in Gothenburg, Sweden. It covers cutting-edge issues related to vehicle systems, including vehicle design, condition monitoring, wheel and rail contact, automated driving systems, suspension and ride analysis, and many more topics. Written by researchers and practitioners, the book offers a timely reference guide to the field of vehicle systems dynamics, and a source of inspiration for future research and collaborations.
Book Synopsis Rollover of Heavy Commercial Vehicles by : C.B Winkler
Download or read book Rollover of Heavy Commercial Vehicles written by C.B Winkler and published by . This book was released on 1999 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Shock Absorber Handbook by : John C. Dixon
Download or read book The Shock Absorber Handbook written by John C. Dixon and published by John Wiley & Sons. This book was released on 2008-02-28 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Every one of the many millions of cars manufactured annually worldwide uses shock absorbers, otherwise known as dampers. These form a vital part of the suspension system of any vehicle, essential for optimizing road holding, performance and safety. This, the second edition of the Shock Absorber Handbook (first edition published in 1999), remains the only English language book devoted to the subject. Comprehensive coverage of design, testing, installation and use of the damper has led to the book's acceptance as the authoritative text on the automotive applications of shock absorbers. In this second edition, the author presents a thorough revision of his book to bring it completely up to date. There are numerous detail improvements, and extensive new material has been added particularly on the many varieties of valve design in the conventional hydraulic damper, and on modern developments such as electrorheological and magnetorheological dampers. "The Shock Absorber Handbook, 2nd Edition" provides a thorough treatment of the issues surrounding the design and selection of shock absorbers. It is an invaluable handbook for those working in industry, as well as a principal reference text for students of mechanical and automotive engineering.
