A test method for the rotation angle of a force-measuring wheel based on acceleration
A technology of rotation angle and test method, which is applied to measuring devices, instruments, etc., can solve the problems of rotation angle deviation, difficult to determine the law, inaccurate tire force calculation results, etc., to achieve the effect of improving accuracy and accuracy
Active Publication Date: 2019-05-24
ANHUI AGRICULTURAL UNIVERSITY
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However, the outer ring of the encoder is fixedly connected to the WFT elastomer, and the fixed end of the inner ring is drawn out to be fixedly connected to the car body. This fixed connection point is not in the tire rotation plane, so it will cause additional wheel rotation angle deviation when the vehicle turns, and The law is difficult to determine, and it is not easy to model and compensate, resulting in inaccurate tire force calculation results in the car body coordinate system
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[0029] In this embodiment, a method for testing the rotation angle of a force-measuring wheel based on acceleration is described by using three acceleration sensors. figure 2 It is a schematic structural diagram of the test platform of the present invention; as figure 2 As shown, the present invention sets up a test platform, including wheel 5, elastic body 4, 3 acceleration sensors 3, data acquisition and transmission module 2 and power supply 1; figure 1 Shown, this dynamometer wheel rotation angle test method is to carry out as follows:
[0030] Step 1, a tire six-component force sensor is concentrically arranged on the wheel, and n acceleration sensors are evenly arranged on a quarter of the circumference of the elastic body of the tire six-component force sensor, then the two adjacent acceleration sensors on the circumference angle is
[0031] The elastic body is the core component of the dynamometer wheel. It is connected in series between the wheel rim and the br...
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The invention discloses an acceleration-based force measuring wheel rotation angle test method. The method comprises steps: 1, acceleration sensors are arranged; 2, acceleration values are acquired synchronously; 3, enveloping lines are drawn; 4, quasi oscillation curves are calculated; 5, segmental processing is carried out; 6, a peak point or a trough point and a segment point are acquired in each segment; 7; all peak points or trough points and segment points are acquired and sorted; 8, a time difference is calculated; 9, an angular speed is calculated; and 10, the wheel rotation angle is calculated. The problems that when the traditional photoelectric encoder test method tests the wheel rotation angle, wheel rotation angle deviation is caused by wheel steering and vehicle camber anglechanges influence the test result can be eliminated, the wheel rotation angle test accuracy can thus be improved, and the WFT tire force calculation accuracy is improved.
Description
technical field [0001] The invention relates to the technical field of automobile measurement and control, in particular to an acceleration-based method for testing the rotation angle of a force-measuring wheel. Background technique [0002] Car movement is the result of the joint action of the ground-to-wheel force, the car body-to-wheel force, and the air force, among which the ground-to-tyre force plays a decisive role in the car's movement, especially in extreme conditions. The existing vehicle dynamics stability control system is difficult to solve the control problems under dangerous working conditions such as sideslip or sharp rotation under low adhesion and complex control of the vehicle. Its essence is to estimate the force state and distribution of tires under extreme working conditions not allowed. [0003] Wheel Force Transduces (WFT for short) is the main component of the force-measuring wheel, and is the most direct and effective means to directly test the tir...
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IPC IPC(8): G01B21/22
CPCG01B21/22
Inventor 张小龙钱鹏王恒吴媞程琳戴鹏程
Owner ANHUI AGRICULTURAL UNIVERSITY