A Method for Measuring Tire Longitudinal Slip Length Based on Transfer Function
A transfer function and tire technology, which is applied in the direction of automobile tire testing, etc., can solve the problems of insufficient accuracy of tire longitudinal slip relaxation length, inability to effectively guarantee repeatability, and defects in calculation methods, so as to achieve reliable measurement methods and accurate calculations , good stability
Active Publication Date: 2021-03-23
JILIN UNIV
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Problems solved by technology
[0003] At present, the longitudinal sliding relaxation length calculated by using the ratio of the longitudinal sliding stiffness of the tire to the longitudinal stiffness of the tire is an approximate calculation method. More or less there will be errors
In addition, the stiffness calculation method itself also has the assumption of equivalent stiffness, so the calculation method is also flawed
Therefore, the accuracy of the tire longitudinal slip relaxation length measured by this method is not high enough, and the repeatability cannot be effectively guaranteed.
Method used
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Embodiment Construction
[0024] Such as figure 1 , figure 2 and image 3 As shown, this embodiment includes the following steps:
[0025] 1. Install the test tire on a suitable rim and inflate it to the required air pressure, and then place it in a temperature-controlled laboratory environment for at least 3 hours to achieve the temperature balance inside and outside the tire and to inflate the tire Prepare for preloading under
[0026] 2. Install the rim of the test tire on a steel belt six-component force testing machine with longitudinal sliding drive function, set the required tire pressure, road speed, vertical load, camber angle and side slip angle, and conduct a pre-test on the tire. Make the tire reach the predetermined temperature balance and eliminate the residual stress inside the tire;
[0027] 3. After the pre-test, re-adjust the tire pressure to the pressure value and vertical load required for the test, and set the tire camber and side slip angle to zero degrees;
[0028] 4. Set t...
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The invention discloses a method for measuring tire longitudinal slip relaxation length based on a transfer function. A test tire is mounted on a proper tire six-component testing machine; tire pressure, pavement speed, camber angle, slip angle and vertical load required by the test are set; therefore, the test bed operates at a constant speed and posture and drives the tire to roll; then, propersine wave torque is generated through torque control and input into a tire driving shaft, test data of tire longitudinal force and slip rate along with time under the conditions of required load, speed, frequency and the like are measured, and a tire longitudinal slip relaxation length value is obtained through identification by constructing a transfer function model. The method is reliable, simple in procedure, good in repeatability and high in test efficiency; the longitudinal slip relaxation length value is accurately calculated, the stability is good, and the influence of adverse factors of the test is small; and the change rule of the longitudinal slip relaxation length of the tire under different loads, different speeds and different frequencies can be studied.
Description
technical field [0001] The invention belongs to the field of tire transient mechanical performance evaluation and dynamic modeling, and in particular relates to a method for measuring tire longitudinal slip relaxation length using a transfer function developed by a spindle torque sine test. By rolling the tire on a flat-belt six-component force testing machine and applying longitudinal slip rate or torque loading, the corresponding effective test data is obtained, and the longitudinal slip relaxation length calculation method is developed based on the transfer function method to achieve different loads and different Calculation and evaluation of tire longitudinal slip relaxation characteristics under different speeds and frequencies and dynamic high-precision modeling input. The longitudinal slip relaxation length calculated based on the torque control method and the transfer function method is accurate and the test repeatability is good, especially the longitudinal slip relax...
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IPC IPC(8): G01M17/02
CPCG01M17/02
Inventor 卢荡夏丹华王晓凡卢磊
Owner JILIN UNIV