Topic
Drive by wire
About: Drive by wire is a research topic. Over the lifetime, 361 publications have been published within this topic receiving 3165 citations.
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TL;DR: In this paper, a review of electronic driver assisting systems such as ABS, traction control, electronic stability control, and brake assistant is presented, along with fault-detection methods for use in low-cost components.
Abstract: The article begins with a review of electronic driver assisting systems such as ABS, traction control, electronic stability control, and brake assistant. We then review drive-by-wire systems with and without mechanical backup. Drive-by-wire systems consist of an operating unit with an electrical output, haptic feedback to the driver, bus systems, microcomputers, power electronics, and electrical actuators. For their design safety, integrity methods such as reliability, fault tree and hazard analysis, and risk classification are required. Different fault-tolerance principles with various forms of redundancy are considered, resulting in fail-operational, fail-silent, and fail-safe systems. Fault-detection methods are discussed for use in low-cost components, followed by a review of principles for fault-tolerant design of sensors, actuators, and communication. We evaluate these methods and principles and show how they can be applied to low-cost automotive components and drive-by-wire systems. A brake-by-wire system with electronic pedal and electric brakes is then considered in more detail, showing the design of the components and the overall architecture. Finally, we present conclusions and an outlook for further development of drive-by-wire systems.
390 citations
TL;DR: In this paper, the authors present work in progress on the Southampton Driver Simulator on driver workload and the driver's ability to reclaim control from the Adaptive Cruise Control system in a malignant scenario.
236 citations
TL;DR: A cascaded control structure including a nonlinear trajectory generator filter is adopted, allowing each different control problem to be solved with the most suitable control algorithm and implementation technology.
Abstract: The throttle control plays an important role in the development of drive by wire (DBW) systems. The position control of the throttle valve is quite a complex problem, due to application constraints and system characteristics. A cascaded control structure including a nonlinear trajectory generator filter is adopted, allowing each different control problem to be solved with the most suitable control algorithm and implementation technology. In this regard, the use of variable structure control techniques is the key element to reaching the solution. Extensive simulation tests are reported to show the performance of the proposed control algorithm. A prototype controller is presented. The experimental implementation of the controller for a step from 2.5/spl deg/ to 85.5/spl deg/ indicates a very smooth position trajectory with a maximum dynamic position error of 7/spl deg/. Application specifications are fully satisfied both in terms of control performance and controller cost.
125 citations
TL;DR: Under a set of suited hypotheses, the proposed control structure of bilateral drive-by-wire teleoperation systems is shown to be uniformly ultimate stable, even in the presence of time-varying delays.
Abstract: In this paper, a new predictive approach is proposed for the impedance control of bilateral drive-by-wire teleoperation systems. The proposed control structure includes two mirror predictors/observers in both the master and slave sides. These predictors/observers are used to simultaneously estimate the master and slave internal dynamics, and thereby to avoid the use of the delayed transmitted information. As a consequence, the influence of the delay on the whole system can be minimized and the performance can be improved. Under a set of suited hypotheses, the proposed control structure is shown to be uniformly ultimate stable, even in the presence of time-varying delays. Simulation results are presented to show the effectiveness of the proposed approach. The behavior of the control structure is also experimentally demonstrated while performing remote steering of a small autonomous vehicle
94 citations
01 Jun 2000
TL;DR: Antilock braking systems (ABS) are closed-loop devices designed to prevent locking and skidding during braking as mentioned in this paper, which can be integrated into other vehicle systems, such as four-wheel steering and active suspension.
Abstract: Antilock braking systems (ABS) are closed-loop devices designed to prevent locking and skidding during braking. Traction control systems (TCS) limit the amount of traction force generated at the wheels to prevent loss of traction. Both systems contain an electronic control unit (ECU), which compares signals from each wheel sensor. In ABS systems, the pressure to one or more of the wheels is regulated, whereas in TCS systems, the drive torque to the wheels is reduced.Recent advances include the use of wireless accelerometers, developments in the control software that take into account the dynamics of the tyres and suspension, the estimation of parameters such as lateral acceleration and wheel slip and the use of adaptive control and fuzzy logic. More recently, these systems have been integrated into other vehicle systems, such as four-wheel steering and active suspension. Future improvements might include the use of smart materials for sensor development, and the use of roadside-to-vehicle control.
80 citations