Collision Avoidance System Field Operational Test
12 ACC FUNCTION (Task C4)
The objectives of this task are to:
The approach is to utilize the ACC subsystem that is part of a future production program. The ACC subsystem is a complete control system that uses an integral radar to detect objects in front of the vehicle, and provide throttle and brake control to maintain a safe distance to the car ahead. The radar will also detect objects for the Forward Collision Warning system to be designed into the vehicle. Since the ACC will be used as received, the design work will focus on the interfaces between the ACC system and the rest of the vehicle.
Initial interface designs have been completed. It has been determined that the ACC subsystem will communicate to the DBC 7.2 brake subsystem over a Class 2 bus, and to the throttle stepper motor cruise control (SMCC) over an 8192 baud serial link. Preliminary tests using the ACC radar have provided knowledge about the instrumentation interface requirements for the radar.
Communicating to the ACC system by the other subsystems will be over a CAN interface using an instrumentation protocol. This interface must be established each time the radar is powered up. This will be accomplished by initializing the radarís instrumentation messages to send object data to the other subsystems after each radar scan.
Plans through December 2000
The plans for the next 6 months are to install an ACC-A radar on a test vehicle and evaluate the interface and performance of this radar.
12.1 Task C4 Schedule
[TITLE PAGE] [TABLE OF CONTENTS]
[1 Executive Summary] [2 Introduction] [3 System Integration] [4 Forward Radar Sensor]
[5 Forward Vision Sensor] [6 Brake Control System] [7 Throttle Control System]
[8 Driver-Vehicle Interface] [9 Data Fusion] [10 Tracking & Identification] [11 CW Function]
[12 ACC Function] [13 Fleet Vehicle Build] [14 Field Operational Test]
[Appendix A] [Acronyms]