Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 57 for “"Heavy vehicles"”.
-
Advanced Braking Systems for Heavy Vehicles
… slip control algorithms on pneumatically braked heavy goods vehicles. Anti-lock braking systems (ABS) on commercial heavy vehicles use inefficient control approaches that work on cycles of exceeding the limits of tyre-road adhesion. Long pipe lengths and slow pneumatic brake valves create time …
-
Semi-active damping of heavy vehicles.
… with the use of semi-active suspensions in heavy vehicles to improve ride and reduce road damage. An introduction into the subject is given in chapter 1 and a review of the relevant literature is presented at the beginning of each main chapter. The development and modelling of a prototype, …
-
Design synthesis of articulated heavy vehicles with active trailer steering systems
A new design synthesis method for articulated heavy vehicles (AHVs) with an active trailer steering (ATS) system is examined and evaluated. Due to their heavy weights, large sizes, and complex configurations, AHVs have poor maneuverability at low speeds, and low lateral stability at high speeds. …
-
A wireless communication based active safety system for articulated heavy vehicles
… been developed to improve the safety of road vehicles. This dissertation presents a novel active trailer steering (ATS) system using wireless communication to exchange data among controllers and sensors allocated on the leading and trailing units of an articulated heavy vehicle (AHV). …
-
Lateral stability analysis and MPC tracking control for articulated heavy vehicles
Articulated heavy vehicles (AHVs) exhibit poor maneuverability during curved-path negotiations and low lateral stability under high-speed evasive maneuvers, which may lead to unstable motion modes, e.g., trailer-sway and jackknifing, causing severe accidents. However, vehicle parameters that can …
-
Design and development of side underride protection devices (SUPD) for heavy vehicles
… a passenger vehicle and the ground clearance of heavy vehicles. During collisions between the car and the side of the heavy vehicle, a large amount of intrusion is observed in the passenger compartment due to underride. The results of these collisions often leads to injuries or fatalities. This …
-
Coordinated control of active safety systems for multi-trailer articulated heavy vehicles
… 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 …
-
Parallel design optimization of multi-trailer articulated heavy vehicles with active safety systems
Multi-trailer articulated heavy vehicles (MTAHVs) exhibit unstable motion modes at high speeds, including jack-knifing, trailer swing, and roll-over. These unstable motion modes may lead to fatal accidents. On the other hand, these vehicle combinations have poor maneuverability at low speeds. Of …
-
Fault tolerant control of active trailer steering systems for multi-trailer articulated heavy vehicles
… 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 …
-
Autonomous driving control strategies for multi-trailer articulated heavy vehicles with active safety system
… control system for multi-trailer articulated heavy vehicles (MTAHVs) to enhance road transport efficiency, directional performance, and safety. To this end, a MTAHV with the configuration of A-train double was selected to be the subject vehicle, and the required vehicle models were generated. …
-
Influence of road roughness and directional maneuvers on the dynamic performance of heavy vehicles
… (GVW) and dimensions of articulated freight vehicles have been considerably relaxed during the past few decades, which have contributed to many concerns related to highway safety and preservation of the roadways. The directional dynamics of articulated heavy vehicles is investigated to study …
-
Semi-autonomous driving control of multi-trailer articulated heavy vehicles for increasing highway traffic safety
… driving strategies for Multitrailer Articulated Heavy Vehicles (MTAHVs) to enhance highway safety and transportation efficiency. While autonomous driving has progressed, concerns about safety, reliability, and ethical issues remain, making the transition to full autonomy gradual. Unlike the …
-
Fractional Order State Feedback Control for Improved Lateral Stability of Semi-Autonomous Commercial Heavy Vehicles
… autonomous and semi-autonomous large commercial heavy vehicles, the lateral stability control of articulated vehicles have caught the attention of researchers recently. Active vehicle front steering (AFS) can enhance the handling performance and stability of articulated vehicles for an emergency …
-
Methodology for Development of Delay-Based Passenger Car Equivalents of Heavy Vehicles in Work Zones
The PCE of heavy vehicles in work zones are developed based on delay caused by the heavy vehicles since delay captures the effects of heavy vehicles better than other parameters. A mathematical model was developed to determine the bounds on the delays in work zones. The results of the model for …
-
High-speed lateral stability analysis of articulated heavy vehicles using driver-in-the-loop real time simulation
… 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 …
-
Development of a methodology for measuring delay-based passenger car equivalent for heavy vehicles at signalized intersections
… for measuring passenger car equivalent (PCE) for heavy vehicles at signalized intersections are based on headway concepts, and are mainly focused on adjusting the ideal saturation flow rate. They do not reflect the total effect of heavy vehicles on delay. The constant PCE value, which is …
-
Enhancing roll stability and directional performance of articulated heavy vehicles based on anti-roll control and design optimization.
… improve the rollover stability of articulated heavy vehicles (AHVs) during high speed manoeuvres using anti-roll control systems. A 3-dimensional (3-D) linear yaw/roll model with 5 degrees of freedom is developed. Based on this model a linear quadratic regulator (LQR) controller is designed to …
Page 1 of 3