This standard defines the special terms and definitions for the design, testing and research of vehicle ride comfort. Other terms and definitions related to vibration and shock shall be implemented in accordance with GB 2298-80 "Terms and Definitions for Mechanical Vibration and Shock". GB/T 4971-1985 Vehicle Ride Comfort Terms and Definitions GB/T4971-1985 Standard Download Decompression Password: www.bzxz.net

National Standard of the People's Republic of China
Terms and definitions of automotive ride comfort
UDC629.113.07
GB4971—85
Terms and definitions Automotive ride comfort This standard defines the special terms and definitions for the design, testing and research of automotive ride comfort. Other terms and definitions related to vibration and shock shall be implemented in accordance with GB2298-80 "Terms and definitions for mechanical vibration and shock".
1 Basic terms
1.1 Ride comfort
Ride comfort
The performance of avoiding the vibration and shock generated by the car during driving, which makes people feel uncomfortable, tired or even harmful to health, or causes damage to goods. Ride comfort is one of the main contents of comfort. Note: Comfort (comfort) refers to the performance of providing a comfortable and pleasant riding environment and convenient operating conditions for passengers. Comfort includes, a. Ride comfort;
b. Noise inside the car;
c. Air conditioning performance (temperature, humidity, airflow, etc.); d. Riding environment (activity space, internal equipment, layout, decoration, pedal height, door and channel width, etc.):www.bzxz.net
e: Driving operation performance (the ease of driving operation, the legibility of instruments and signal equipment, etc.). 2 Types of human body vibration
2.1 Whole body vibration
wholebodyvibration
Vibration transmitted to the whole human body through the floor and seat, 2.1.1 Longitudinal vibration of the human body
1 Anatomical coordinates of the human body
longitudinal vibration applied to the human body Linear vibration along the direction of the human spine (Z direction in Figure 1). 2.1.2 Transverse vibration of the human body
Transverse vibration applied to the human body Linear vibration along the left and right direction (Y direction in Figure 1) and the front and back direction (X direction in Figure 1) of the human body. 2.1.2.1 Side-to-side vibration applied to the human body
Side-to-side vibration applied to the human body Linear vibration along the left-right direction of the human body (Y direction in Figure 1), 2.1.2.2 Back-to-chest vibration applied to the human body Linear vibration along the front-to-back direction of the human body (X direction in Figure 1). 2.2 Local vibration of the human body
vibration applied to the paticular parts of the human body Vibration applied to individual parts of the human body through the handles, pedals, steering wheels, armrests and headrests of the operating mechanism.
3 Types of automobile vibration
3.1 Vertical vibration
vertical vibration
Linear vibration along the Z axis of the car (see Figure 2), Figure? Vehicle coordinate system
Note: The origin of the coordinates is at the center of gravity of the vehicle, XOZ is in the longitudinal symmetry plane of the vehicle, the axis is parallel to the ground and points to the direction of the vehicle's forward movement, the Z axis points upward, and the axis points to the driver's left. 3.2 Longitudinal vibration
longitudinalvibration
Linear vibration along the direction of the vehicle axis (see Figure 2). 3.3 Transverse vibration
transversevibratiOn
Linear vibration along the direction of the vehicle axis (see Figure 2). 3.4 Pitch vibration
pitch vibration
Angular vibration around the vehicle's Y axis (see Figure 2). 3.5 Roll vibration
rollvibration
Angular vibration around the vehicle's X axis (see Figure 2). 3.6 Yaw vibration
yawvibration
Angular vibration around the vehicle's Z axis (see Figure 2). 4 Special vibrations
4.1 Motion sickness
Motion sickness
Pathological phenomena such as nausea and vomiting caused by vibrations below 1 Hz. 4.2 Shaking
Vertical vibration and lateral vibration of the vehicle body caused by the out-of-roundness and imbalance of the wheels. 5 Test methods
5.1 Feeling evaluation
Feeling evaluation
Evaluation is carried out based on the subjective feeling of the evaluator. 5.2 Physical quantity evaluation
Objectiveevaluation
Evaluation is carried out based on the measured physical quantities such as vibration displacement, velocity, acceleration, etc. 5.3 Pulse input running test
Pulse input running test
Rhythm test of the vehicle driving over bumps and pits 5.4 Random input running test
Random input running test
Rhythm test of the vehicle driving on a randomly uneven road surface. 6 Other terms
6.1 Exposure time
Exposure time
The time a person is exposed to a continuous vibration environment6.2 Fatigue-decreased proficiency boundary
fatiguedecreased proficiencyboundaryThe exposure time limit at which a person's work ability and efficiency are significantly reduced due to fatigue. 6.3 Exposure limit
Exposure limit
The exposure time limit that affects a person's health or safety. 6.4 Reduced comfort boundary
reducedcomfortboundary
The exposure time limit that makes a person feel uncomfortable (for example, difficulty in eating, reading, and writing). Additional remarks:
This standard was proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of Changchun Automobile Research Institute. This standard was drafted by Changchun Automobile Research Institute. The main drafters of this standard are Wei Xueyan and Wang Binggang.
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