By Peter Johannes Bergmiller
This publication provides methods to handle key demanding situations in accordance with a car point view and with a unique emphasis on Drive-by-Wire structures. The layout and trying out of recent car electronics have gotten increasingly more tough as a result of expanding interdependencies between parts and the security criticality of initiatives. the improvement in the direction of Drive-by-Wire functionalities in autos with a number of actuators for automobile keep an eye on additional raises the problem. The ebook explicitly takes into consideration the interactions among elements and goals at bridging the space among the necessity to generate extra purchaser advantages and the hassle to accomplish sensible safety.
The publication follows a twofold procedure: at the one facet, it provides a toolchain to help effective additional improvement of novel functionalities for Drive-by-Wire automobiles. The toolchain contains applicable software program instruments and scaled and full-scale experimental automobiles. at the different part, improvement in the direction of functionally secure and versatile Drive-by-Wire cars is addressed by means of presenting a top-down designed structure for car electronics that's enabled by way of compatible mechanisms. The ensuing aim fulfillment with reference to practical protection is evaluated according to a singular hierarchical approach.
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Additional info for Towards Functional Safety in Drive-by-Wire Vehicles
State estimation Data processing Local data acquisition Feedback control Data Processing Prototype driving function Sensor data fusion Vehicle state acquisition Local data acquisition Emergency run driving function Vehicle control function Control algorithm Global data acquisition Diagnostic fusion Diagnostic function Reference generation Stability control Hardware monitoring Safety reference Safety monitoring Safety guard Access control Actuator control Prototype driving function Switch Actuator control Emergency run driving function Sensor data Commands to actuators Access control Power supply Stability controller 54 Fault tolerant units Merging views 55 56 Data processing Reference generation Diagnostic fusion Control algorithm Safety guard Hardware monitoring Safety guard Hardware monitoring Diagnostic fusion Safety monitoring Actuator control Data processing Stability controller Safety reference Local data acquisition Actuator control Safety monitoring Diagnostic fusion Data processing Safety guard Hardware monitoring Actuator control Inertial measurm.
6 Operating systems ❺ Functional redundancy ❻ Power supply ❼ 100 46 Online diagnostics, degradation ❽ Knowledge base ❾ Differentiation of MOBILE 47 SIRIUS 2001 SPARC project Lessons learned 48 Control inputs Commands Vehicle control to actuators function Feedback Sensor data Vehicle Driver 3 35 49 Vehicle control function Control inputs Emergency run driving function Stability control Vehicle state acquisition Commands to actuators Access control Diagnostic function Feedback Sensor data Prototype driving function Functional architecture → → → → 50 Front axle control system User interface Rear axle control system Stability control system Power supply system Data bus Inertial meas.
Coordinates, cur. orientation ref. coordinates, ref. orientation Virtual Driver Speed profile generator Orientation controller Lateral displacement controller Dynamic weighting Speed controller steering angle torque Driving Performance System Single track model as reference Torque vectoring controller Speed controller Longitudinal accelleration controller Yaw rate controller Side slip controller Dynamic weighting Dynamic weighting Torque distribution wheel torques wheel steering angles Virtual Vehicle Drive train model Double track model Tire model wheel speeds, accelerations, yaw rate, etc.