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GB/T 6323-2014: Controllability and Stability Test Procedure for Automobile Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 6323: Historical versions
Similar standardsGB/T 6323-2014: Controllability and Stability Test Procedure for Automobile---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT6323-2014NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 43.040.50 T 23 Replacing GB/T 6323.1~6323.6-1994 Controllability and Stability Test Procedure for Automobile Issued on. FEBRUARY 19, 2014 Implemented on. JUNE 1, 2014 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative References... 5 3 Instruments and Equipment... 5 4 Test Conditions... 7 5 Pylon Course Slalom Test... 8 6 Steering Transient Response Test (steering wheel angle step input)... 17 7 Steering Transient Response Test (steering wheel angle pulse input)... 25 8 Returnability Test... 30 9 Steering Efforts Test... 38 10 Steady Static Circular Test... 44 11 Controllability and Stability Test of Central Area of Steering Wheel... 49 12 Test Report... 58 Appendix A (normative) Data Sheet - Basic Evaluation Test... 59 Appendix B (informative) Data Sheet -- Benchmarking Test... 61 Appendix C (informative) Test Condition -- Benchmarking Test... 67 Appendix D (informative) Steady Static Circular Test Procedure -- Fixed Turning Radius Method... 691 ScopeThis Standard specifies the pylon course slalom test procedure, steering transient response test procedure (steering wheel angle step input and steering wheel angle pulse input), returnability test procedure, steering efforts test procedure, steady static circular test procedure, and controllability and stability test procedure for the central area of steering wheel for automobile. The pylon course slalom test procedure, steering transient response test procedure (steering wheel angle step input and steering wheel angle pulse input), returnability test procedure, and steering efforts test procedure are applicable to Type-M, Type-N and Type-G vehicles. The steady static circular test procedure is applicable to bi-axial Type-M, Type-N and Type-G vehicles. The controllability and stability test procedure for the central area of steering wheel is applicable to Type-M1 and Type-N1 vehicles. Other types of vehicles may take them as a reference.2 Normative ReferencesThe following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 3730.1 Motor Vehicles and Trailers - Types - Terms and Definitions GB/T 3730.2 Road Vehicles - Masses - Vocabulary and Codes GB/T 12534-1990 Motor Vehicles - General Rules of Road Test Method GB/T 12549 Terms and Definitions for Vehicle Controllability and Stability GB/T 15089 Classification of Power-driven Vehicles and Trailers3 Instruments and Equipment3.1 The instruments required for the test are as follows. 3.2 The test instruments shall comply with the requirements of 3.5 in GB/T 12534-1990. 3.3 The measurement range and maximum error of the various measuring instruments shall satisfy the requirements in Table 1. 3.5 The various sensors are installed in accordance with their respective instruction manuals. Specifically speaking, the speedometer shall be installed on the longitudinal symmetry plane of the vehicle; the controllability and stability tester shall be as close to the center of mass of the vehicle as possible.4 Test Conditions4.1 Test Vehicles 4.1.1 Before the test, determine the wheel positioning parameters. Check, adjust and tighten the steering system and suspension system; lubricate them as required. 4.1.2 If new tires are used for the test, before the test, they shall at least go through 200 km of normal running. If used tires are used for the test, after the test is completed, the residual tire crown pattern depth shall be not less than 1.6 mm. The tire pressure shall comply with the exit-factory technical requirements of the vehicle. 4.1.4 In pylon course slalom test, the load state is the maximum design total mass of the vehicle. In steering transient response test (steering wheel angle step input and steering wheel angle pulse input), 4.2 Test Site and Environment 4.2.1 Test site shall be dry, flat and clean, with cement concrete or asphalt pavement. The slope in any direction shall not be greater than 2%. In terms of the controllability and stability test of the central area of steering wheel, the slope shall be not greater than 1%. 4.2.2 The wind speed shall be not greater than 5 m/s.5 Pylon Course Slalom Test5.1 Test Instruments 5.2 Measurement Parameters 5.3 Test Methods 5.3.1 On the test site, in accordance with the stipulations of Figure 1 and Table 2, set up 10 stakes. 5.4 Data Processing of Pylon Course Slalom Test 5.4.1 Test speed The test speed for the ith pylon course slalom test shall be determined in accordance with Formula (1). 5.4.3 Average yaw velocity The average yaw velocity of the ith test shall be determined in accordance with Formula (3). 5.4.4 Average roll angle of vehicle body The average roll angle of vehicle body of the ith test shall be determined in accordance with Formula (4). 5.5 Result Expression of Pylon Course Slalom Test 5.5.1 Fill in the peak data of the time-history curve of the various measurement variables within the effective staking area and the driver’s subjective evaluation into Table 3. 5.5.2 In the form of Figure 3, fit-draw the relational graph of the average yaw velocity and the vehicle speed. 5.5.3 In the form of Figure 4, fit-draw the relational graph of the average steering wheel angle and the vehicle speed. 5.5.4 In the form of Figure 5, fit-draw the relational graph of the average roll angle of vehicle body and the vehicle speed.6 Steering Transient Response Test (steering wheel angle step input)6.1 Test Instruments 6.3 Test Methods 6.3.1 The test speed is determined in accordance with 70% of the maximum speed of the tested vehicle (rounded off to an integer multiple of 10). However, the maximum test speed should not exceed 120 km/h. 6.3.2 Before the test, at the test speed, run for 10 km, so as to warm up the tires. 6.4 Test Data Processing 6.4.1 The steady-state values of the various measurement variables shall adopt the mean value after entering the steady state. If the rate of change of the vehicle’s forward speed is greater than 5%, or if the change of the steering wheel angle exceeds 10% of the mean value, then, this test is invalid. 6.4.2 Adopt the method specified in 5.4.5.1 a) or 5.4.5.1 b) to obtain the time-history of lateral acceleration; determine the steady-state acceleration value. 6.4.3 In accordance with Figure 7, determine the response time of the yaw velocity and the lateral acceleration. 6.4.4 In accordance with Figure 7, determine the response time of the yaw velocity. If peak value does not emerge, it shall be explained in the remarks in Appendix A. 6.4.5 The overshoot of yaw velocity shall be determined in accordance with Formula (7). 6.5.2 In accordance with the following curve forms, express the test data at different lateral accelerations.7 Steering Transient Response Test (steering wheel angle pulse input)7.1 Test Instruments 7.2 Measurement Parameters 7.3 Test Methods 7.3.1 The test speed shall be 70% of the maximum design speed of the tested vehicle and rounded off to an integer multiple of 10. 7.3.5 During the test, in accordance with the triangular pulse curve shown in Figure 16, turn the steering wheel (steering wheel angle pulse input) at least three times respectively in the left direction and the right direction. The time interval between each input shall be not less than 5 s. 7.4 Test Data Processing 7.5 Test Result Expression 7.5.1 In accordance with the mean value of the test data processing result, turn the steering wheel to the left and the right, respectively draw the amplitude-frequency phase-frequency characteristic diagram of the vehicle, as it is shown in Figure 17 (in Figure 17, the X-coordinate is a logarithmic coordinate, or, linear coordinate may also be used. The X-coordinate shall be 0 Hz ~ 3 Hz).8 Returnability Test8.1 Test Instruments 8.3 Test Methods 8.3.1 Low-speed returnability test 8.3.1.1 On the test site, use bold colors to draw a circle with a radius of not less than 15 m. 8.3.2.2 The test vehicle speed shall be 70% of the maximum speed of the tested vehicle and rounded off to an integer multiple of 10. 8.3.2.3 Turn on the instrument power to let it reach the normal working temperature. 8.4 Returnability Test Data Processing The time-history curve of yaw velocity is divided into two types. convergent type (shown in Curve 1~4 in Figure 18) and divergent type (shown in Curve 5 ~ 6 in Figure 18). In terms of the divergent type, no data processing is performed. In terms of the convergent type, in accordance with the left-turning and right-turning, respectively determine the following indexes.9 Steering Efforts Test9.1 Test Instruments 9.3 Test Methods 9.3.1 On the test site, use bold colors to draw a lemniscate trajectory (see Figure 24). The polar coordinate equation of the lemniscate trajectory shall be determined in accordance with Formula (22). The definitions of symbols in the formula are shown in Figure 24. 9.4 Test Data Processing 9.4.1 In accordance with the recorded steering wheel angle and the applied torque, in accordance the lemniscate path of every week, organize into the Msw-sw curve shown in Figure 25, or directly adopt the above-mentioned parameters obtained through 16 Stakes 9.4.4 Work function of steering wheel 9.4.4.1 The work function of every week of running along the lemniscate path shall be determined in accordance with Formula (27). ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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