Electric power steering system control strategy based on steering motion closed loop
An electric power steering and control strategy technology, applied in power steering mechanism, automatic steering control components, steering mechanism, etc., can solve problems such as multiple thresholds, complex switching logic, and increase the difficulty of calibration in real vehicle field tests. The effect of shortening development cycle, improving quality, reducing difficulty and workload
Active Publication Date: 2021-06-04
JILIN UNIV
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Problems solved by technology
[0005] The purpose of the present invention is to provide a closed-loop control strategy of electric power steering system based on steering motion, so as to solve the problem that there are multiple control modes in the EPS proposed in the above-mentioned background technology, which requires complex switching logic and more threshold values, which increases the It is difficult to calibrate the actual vehicle field test, and it is impossible to ensure that the steering wheel torque and the steering movement intensity of the vehicle have a definite corresponding relationship
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[0026] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatuses and methods consistent with aspects of the presently disclosed embodiments as recited in the appended claims.
[0027] see figure 1 , in an embodiment of the present invention, a control strategy for an electric power steering system based on a closed-loop steering motion, the control strategy includes a steering style module, a module for determining a desired pinion angle, and a module for determining a steering resistance torque at a desired pinion.
[0028] The steering style m...
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The invention relates to the technical field of automobiles, in particular to an electric power steering system control strategy based on a steering motion closed loop, and the control strategy comprises: designing a steering style module, an expected pinion rotation angle determination module and an expected pinion steering resistance moment determination module. The steering style module determines expected steering motion intensity through the torque of a steering wheel; the desired pinion angle determination module determines a desired pinion angle from the actual and desired steering motion intensities; the expected pinion steering resistance torque determination module determines the steering resistance torque equivalent to the pinion through the actual and expected pinion rotation angles, and further determines the target power-assisted torque of the electric power-assisted steering system. The invention has the beneficial effects that power-assisted control, damping control and return control modes of the EPS are unified, complicated switching logic and threshold values are not needed, the difficulty and workload of a real vehicle site test in the later stage of EPS product development are reduced, the EPS development period is shortened, and a consistent steering feeling is provided.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a control strategy of an electric power steering system based on a closed-loop steering motion. Background technique [0002] In recent years, electric power steering system (EPS) has been widely used in automobiles due to its advantages of energy saving, environmental protection and safety. A good power steering system should be able to take into account the requirements of light steering, road feel and return performance, and give people a good and consistent steering feeling. As the core of the EPS system, the EPS control strategy has an important influence on the steering performance of the vehicle. [0003] At present, in the published EPS documents and patents, the EPS control strategy includes a variety of control modes, mainly including power control, damping control, and return control. Invention patent CN102717826A discloses a vehicle electric power steering system...
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IPC IPC(8): B62D5/04B62D6/00B62D101/00B62D137/00
CPCB62D5/0463B62D6/008
Inventor 管欣张育宁卢萍萍段春光詹军杨得军
Owner JILIN UNIV