GB/T 43947-2024 English PDF (GBT43947-2024)

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GB/T 43947-2024: General technical requirements for chassis-by-wire of low speed automated vehicle
GB/T 43947-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.020
CCS T 20
General technical requirements for chassis-by-wire of low
speed automated vehicle
ISSUED ON: APRIL 25, 2024
IMPLEMENTED ON: NOVEMBER 01, 2024
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 General requirements ... 9
4.1 Design and manufacture requirements ... 9
4.2 Emergency stop device ... 9
4.3 Collision protection ... 9
4.4 Operating control ... 10
4.5 Waterproof grade and electric shock protection ... 10
4.6 Lighting and signaling ... 11
4.7 Product instructions ... 11
4.8 Marking and plate ... 12
5 General technical requirements ... 12
5.1 General requirements ... 12
5.2 Straight-line driving stability ... 12
5.3 Requirements for environmental adaptability ... 13
5.4 Basic requirements for functional safety ... 13
5.5 Information security requirements ... 15
5.6 Electromagnetic compatibility requirements ... 15
5.7 Fault handling requirements ... 15
5.8 Power supply and electrical system ... 16
5.9 Communication and interface ... 17
6. Requirements for the chassis-by-wire system ... 18
6.1 Drive-by-wire system ... 18
6.2 Brake-by-wire system ... 19
6.3 Steer-by-wire system ... 21
7 Test methods ... 22
7.1 Test site requirements... 22
General technical requirements for chassis-by-wire of low
speed automated vehicle
1 Scope
This document specifies the technical requirements, chassis-by-wire system
requirements and test methods for chassis-by-wire of low speed automated vehicle.
This document applies to low-speed chassis-by-wire used in pure electric non-road
autonomous-service-vehicles with a maximum driving speed not exceeding 25 km/h.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 4208, Degrees of protection provided by enclosure (IP code)
GB 16735, Road vehicle - Vehicle identification number (VIN)
GB 18384-2020, Electric vehicles safety requirements
GB/T 18385, Electric vehicles - Power performance - Test method
GB/T 18387, Limits and test method of magnetic and electric field strength from
electric vehicles
GB/T 20234.1, Connection set for conductive charging of electric vehicles - Part 1:
General requirements
GB 24943, Safety signs for tri-wheel vehicles and low-speed goods vehicles
GB/T 25978, Road vehicle - Plates and label
GB/T 31486, Electrical performance requirements and test methods for traction
battery of electric vehicle
GB 32087, Towing devices for light-duty vehicle
GB/T 34589, Road vehicles - Diagnostic connector
4 General requirements
4.1 Design and manufacture requirements
4.1.1 The design and manufacture of chassis-by-wire of low speed automated vehicle
shall ensure its safe operation. There shall be no unreasonable hazards during normal
operation and maintenance according to the product instructions.
4.1.2 The components used in the chassis-by-wire of low speed automated vehicle shall
comply with the relevant national standards and be manufactured in accordance with
product drawings and technical documents approved through prescribed procedures.
4.1.3 The chassis-by-wire of low speed automated vehicle shall be fixed or installed
with at least one traction device at the front, which shall comply with the technical
requirements of GB 32087.
4.2 Emergency stop device
4.2.1 The chassis-by-wire of low speed automated vehicle shall be equipped with an
emergency stop device or an emergency stop device drive interface. The signal
triggered by the emergency stop device shall be able to be stored in the EDR or
uploaded to the vehicle platform.
4.2.2 The emergency stop device shall be installed in a conspicuous and easily
accessible location.
4.2.3 The emergency stop device shall take precedence over other control devices of
the chassis-by-wire of low speed automated vehicle.
4.2.4 The emergency stop device shall be an ON/OFF type or automatic reset type
device.
4.2.5 The emergency stop device shall be reset manually or automatically by remote
control.
4.2.6 The emergency stop output signal shall remain valid after the power of the chassis-
by-wire of low speed automated vehicle is removed.
4.3 Collision protection
The chassis-by-wire of low speed automated vehicle shall support the installation of a
collision protection device, which shall be able to perform emergency braking when
colliding with an obstacle, where the trigger force shall not exceed 50 N. After manual
confirmation, the emergency stop state shall be released manually or remotely. During
the entire process before and after the collision, relevant collision information shall be
able to be stored in the EDR or uploaded to the vehicle platform.
4.4 Operating control
4.4.1 When the chassis-by-wire of low speed automated vehicle is subject to manual
operating control, the remote control distance shall not exceed 50 m. If it exceeds 50 m,
the manual operating control shall issue an alarm signal. The response time FROM the
control command is issued TO the chassis begins the corresponding operation shall not
exceed 100 ms; when the control command is lost, the chassis-by-wire of low speed
automated vehicle shall be able to stop immediately and maintain static parking.
4.4.2 When the chassis-by-wire of low speed automated vehicle is in the “driving-
enabled mode” and the remote control has not been operated for more than 1 minute,
the remote control shall be unlocked before the chassis-by-wire of low speed automated
vehicle can be operated normally.
4.4.3 When the chassis-by-wire of low speed automated vehicle exceeds the planned
control range of the remote driving system, the remote driving system shall issue an
alarm signal and the chassis-by-wire of low speed automated vehicle shall be able to
stop immediately and maintain static parking.
4.5 Waterproof grade and electric shock protection
4.5.1 Electrical components that constitute a dangerous factor in a chassis-by-wire of
low speed automated vehicle shall have fixed protective covers and housings, which
shall only be removed or opened with tools during normal operation or when not in
service.
4.5.2 According to the grade B voltage specified in GB 18384-2020, the requirements
for waterproof grade of components are determined according to the installation area
when the vehicle is fully loaded. The protection grade of components in each area shall
meet the relevant provisions of GB/T 4208. The specific requirements are as follows:
a) For battery and electrical compartment, the protection grade shall not be less
than IPX3;
b) For shielded high-voltage components under the chassis-by-wire of low speed
automated vehicle, the protection grade shall not be less than IPX4;
c) For unobstructed high-voltage components under the chassis-by-wire of low
speed automated vehicle, the protection grade shall not be less than IPX7.
4.5.3 The simulated cleaning and simulated wading tests shall be carried out in