Development of Heavy Truck ABS and Limit Maneuvers Model
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The Ohio State University / OhioLINK
2004
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=osu1407951151 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu1407951151 |
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NDLTD |
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English |
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NDLTD |
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Mechanical Engineering |
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Mechanical Engineering Zaugg, Brian Christopher Development of Heavy Truck ABS and Limit Maneuvers Model |
| author |
Zaugg, Brian Christopher |
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Zaugg, Brian Christopher |
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Zaugg, Brian Christopher |
| title |
Development of Heavy Truck ABS and Limit Maneuvers Model |
| title_short |
Development of Heavy Truck ABS and Limit Maneuvers Model |
| title_full |
Development of Heavy Truck ABS and Limit Maneuvers Model |
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Development of Heavy Truck ABS and Limit Maneuvers Model |
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Development of Heavy Truck ABS and Limit Maneuvers Model |
| title_sort |
development of heavy truck abs and limit maneuvers model |
| publisher |
The Ohio State University / OhioLINK |
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2004 |
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http://rave.ohiolink.edu/etdc/view?acc_num=osu1407951151 |
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AT zauggbrianchristopher developmentofheavytruckabsandlimitmaneuversmodel |
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1719436964290101248 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-osu14079511512021-08-03T06:26:57Z Development of Heavy Truck ABS and Limit Maneuvers Model Zaugg, Brian Christopher Mechanical Engineering One of the highest priorities in the research and development of commercial vehicles is the implementation of safety systems, such as anti-lock braking systems. In addition, the behavior of ABS systems can be fully understood only through thorough testing and the development of full vehicle modeling, as performed in this research. This study focuses on the development of a heavy truck ABS model which accurately simulates real-world vehicle behavior during limit handling maneuvers.This research was performed at the National Highway Traffic Safety Administration’s (NHTSA) Vehicle Research and Test Center (VRTC) in East Liberty, Ohio. The work at TRC included lightly loaded and fully loaded vehicle field tests of a Peterbilt 6x4 straight truck, development of a full vehicle model through TruckSim software, and the development of a heavy truck ABS system with the use of Simulink software.The truck maneuvers included include straight ahead braking on wet Jennite, high-µ stops on dry asphalt, and wet Jennite brake-in-curve runs. Each of these maneuvers was performed at both load configurations and for multiple runs. The Peterbilt was equipped with a 64-channel data acquisition system which monitored a number of parameters including wheel speed, inertial parameters, and brake chamber pressures.The TruckSim vehicle model was developed through the acquisition of a number of vehicle properties. Many of the required properties were measured directly, including the spin axes, wheelbase, and load parameters, yet some of these parameters had to be estimated. The estimated parameters were scaled with reference to a Volvo 6x4 truck- tractor, which was fully measured by the University of Michigan Transportation Research Institute (UMTRI). A vehicle model was developed for both loading conditions and was run in parallel with the Simulink ABS model for full vehicle simulations.The Simulink heavy truck ABS model was based off of a previously developed NHTSA ABS model, and this research focused on the development of a new ABS controller model. The previous ABS controller model based modulation logic on user specified test conditions and provided no brake chamber stepping pressure builds, which are common to ABS operation. In addition it required the true vehicle speed and surface friction level, which are parameters not received by the actual ABS controller. The new ABS controller model uses only the inputs received by the physical ABS controller and simulates much of the physical controller behavior. The new controller model estimates the vehicle speed from the wheel encoders, estimates the surface friction level, selects wheel tangential acceleration and slip ratio threshold levels to derive modulation logic, and provides brake chamber stepping pressure builds.The new ABS model was found to accurately model the field test vehicle behavior under low-µ runs, including the wet Jennite straight ahead braking and brake-in- curve maneuvers. The model accurately reproduced vehicle speed, brake chamber pressure, wheel tangential acceleration, and slip ratios. The model also provided moderately accurate simulations of the field test high-µ stops. These simulations differed in vehicle speed and did not fully replicate the high frequency behavior of the field tests, yet closely modeled the brake chamber pressures. The inaccuracy is believed to be due to the higher order dynamics not represented in the vehicle model, inaccurate steer axle brake torque coefficients, and the necessity of an improved tire model. Additional suggested studies are discussed in the final section of this report. 2004 English text The Ohio State University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=osu1407951151 http://rave.ohiolink.edu/etdc/view?acc_num=osu1407951151 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |