TRW AUTOCRUISE AC20 User Manual
Report No : PRO_SPC_276
Issue : B
Date : 06/06/2005
Commercially Confidential
AC20 User Manual
Background & Summary
Background
AUTOCRUISE / TRW is an established player in the ACC market place. The
purpose of the ACC system is to provide an extension to cruise control and to
control the vehicle’s speed, in accordance with a driver’s set speed, or
headway, taking account of the traffic conditions.
Summary
This document provides the potential user with information about the top level
functionality of this AC20 radar sensor to be fitted on a vehicle by a car or
truck manufacturer
Approvals
Name
Signature
Date
Author:
(Last issue)
Checked by:
Approved
P.MALLEJAC
Project Manager, Autocruise
02/05/05
by:
Ce document n’est maîtrisé que s’il est identifié “copie maîtrisée” ou examiné d’une zone autorisée du système informatique
d’Autocruise. Les informations contenues dans ce document sont la propriété d’Autocruise SA et ne peuvent être utilisés par une
tierce partie sans l’accord écrit d’Autocruise SA
Page 1 sur 14 S01-010_A
Report No : PRO_SPC_276
Issue : B
Commercially Confidential
Release History
Issue Date Author Details
A 02/05/05 P. MALLEJAC First issue
B 06/06/05 P. MALLEJAC Section 6.2 completed
Ce document n’est maîtrisé que s’il est identifié “copie maîtrisée” ou examiné d’une zone autorisée du système informatique
d’Autocruise. Les informations contenues dans ce document sont la propriété d’Autocruise SA et ne peuvent être utilisés par une
tierce partie sans l’accord écrit d’Autocruise SA
Page 2 sur 14 S01-010_A
Printed 06-Jun-05
Report No : PRO_SPC_276
Issue : B
Commercially Confidential
Table of Contents
APPROVALS.......................................................................................................................................... 1
1 SCOPE.............................................................................................................................................4
2 SAMPLE SYSTEM SCHEMATIC .............................................................................................. 5
2.1 ACC SYSTEM COMMUNICATIONS STRATEGY............................................................................ 5
3 ACC VEHICLE SYSTEMS COMMUNICATIONS .................................................................. 6
4 CONFIGURING THE ACC SYSTEM ........................................................................................ 6
4.1 INITIAL CONFIGURATION...........................................................................................................6
4.2 ELECTRICAL INTERFACE............................................................................................................ 6
4.2.1 Power Supply....................................................................................................................6
4.3 MECHANICAL DESCRIPTION ......................................................................................................8
4.3.1 AC20 Sensor Illustrations................................................................................................. 8
4.4 OUTLINE DRAWING ................................................................................................................... 8
4.4.1 Sensor Alignment Process ..............................................................................................10
4.4.2 Radar Alignment Principles ...........................................................................................10
5 INSTALLATION ......................................................................................................................... 12
6 WARNINGS / STATEMENTS ................................................................................................... 14
6.1 WARNING REQUIRED BY 15.21 ................................................................................................ 14
6.2 STATEMENT REQUIRED BY 15.19 AND RSS210 .......................................................................14
6.3 STATEMENT REQUIRED BY 15.105 ........................................................................................... 14
7 REFERENCES .............................................................................................................................14
Ce document n’est maîtrisé que s’il est identifié “copie maîtrisée” ou examiné d’une zone autorisée du système informatique
d’Autocruise. Les informations contenues dans ce document sont la propriété d’Autocruise SA et ne peuvent être utilisés par une
tierce partie sans l’accord écrit d’Autocruise SA
Page 3 sur 14 S01-010_A
Printed 06-Jun-05
Report No : PRO_SPC_276
Issue : B
Commercially Confidential
1 Scope
Autocruise/TRW is an established player in the ACC market place. This
document provides a product summary of the AC20 sensor that is suitable for
integration into cars and trucks.
The products offered will be comfort assistance ACC system, as well as
providing some meaningful steps along the road to driver warning systems.
This document provides the user with information about the top functionality
of this AC20 radar sensor to be fitted on a vehicle by a car or truck
manufacturer
The AC20 radar sensor needs a number of inputs to allow it to function
correctly. These include the following
• Electrical Power
• Mounting instructions
• Yaw rate information
• Vehicle speed information
The data interface to the AC20 radar sensor is via a CAN communications
link.
Ce document n’est maîtrisé que s’il est identifié “copie maîtrisée” ou examiné d’une zone autorisée du système informatique
d’Autocruise. Les informations contenues dans ce document sont la propriété d’Autocruise SA et ne peuvent être utilisés par une
tierce partie sans l’accord écrit d’Autocruise SA
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Printed 06-Jun-05
Report No : PRO_SPC_276
Issue : B
Commercially Confidential
2 Sample System Schematic
An ACC system can be configured which will supply data that can be
monitored or used as an input to a control system to control a vehicle. It can
also be connected to a PC running the CCP protocol [Ref. 1] for reprogramming and monitoring what is happening inside the radar sensor.
The AC20 radar sensor requires yaw and vehicle speed data and will give out
the distances and speeds of the vehicles in front.
CCP
PC
Vehicle Speed &
Yaw Rate
AC20
radar
sensor
ACC targets &
Vehicle Information
Monitor
tool or
ACC
controller
Figure 1 - Sample System Schematic
2.1 ACC System Communications Strategy
At power up, the AC20 radar sensor will automatically report the speed and
relative velocity of vehicles sensed by the radar if it has received yaw and
vehicle speed data.
The radar requires the vehicle speed and vehicle yaw rate. This should be
transmitted to the radar at an update rate of between 20mSec to 40mSec.
This message is referred to as the vehicle dynamics message.
CAN interfaces are detailed in a separate document Ref. [2]. These CAN
interface can be customized according to customer’s requirements.
Ce document n’est maîtrisé que s’il est identifié “copie maîtrisée” ou examiné d’une zone autorisée du système informatique
d’Autocruise. Les informations contenues dans ce document sont la propriété d’Autocruise SA et ne peuvent être utilisés par une
tierce partie sans l’accord écrit d’Autocruise SA
Page 5 sur 14 S01-010_A
Printed 06-Jun-05
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