Hydraulic brake cylinder pressure estimation method and hydraulic brake cylinder pressure estimation device on basis of electromechanical similarity theory
A hydraulic brake and wheel cylinder technology, applied in the direction of brakes, etc., can solve problems such as difficult data measurement and analysis, lack of universality, complex mechanical systems, etc., and achieve the effects of easy promotion, shortened development cycle, and reduced production costs
Active Publication Date: 2014-07-09
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
[0005] In view of this, the present invention provides a hydraulic brake wheel cylinder pressure estimation method and device based on electromechanical similarity theory, which is used to solve the need to build a hydraulic adjustment system platform in the existing automobile hydraulic brake wheel cylinder pressure estimation method, It is not conducive to secondary development, not universal, and the mechanical system is complex and difficult to measure and analyze data
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[0028] When using the traditional method to estimate the pressure of the automobile wheel cylinder, because it is necessary to build a pedestal for the automobile hydraulic adjustment system, the consumables are labor-intensive, and it can only be used for a specific type of hydraulic adjustment system, which is not conducive to secondary development and is not universal. Versatility, and the complexity of the mechanical system is not easy to measure and analyze data, so there are many problems in the traditional method. The electrical system is easy to measure and has a complete set of circuit theory. Therefore, if the electrical system can be used to estimate the pressure of the wheel cylinder of the automobile, it is expected to overcome the above problems. The automobile hydraulic braking system belongs to the mechanical system with hydraulic transmission, and there is a corresponding relationship between the machinery and the circuit. Therefore, it can be considered to sim...
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The invention provides a hydraulic brake cylinder pressure estimation method and a hydraulic brake cylinder pressure estimation device on the basis of an electromechanical similarity theory. The hydraulic brake cylinder pressure estimation method includes: simulating an automobile hydraulic brake system cylinder model by an electric device, wherein the simulated automobile hydraulic brake system cylinder model is formed by similar conversion of a hydraulic brake mechanical system and a flow characteristic via electromechanical similarity relation; selecting a brake condition and simulating an electromagnetic valve control instruction to drive the hydraulic brake system cylinder model via electric semaphore; measuring electric parameters of the hydraulic brake system cylinder model controlled by the control instruction; obtaining cylinder pressure of the hydraulic brake mechanical system via the electromechanical similarity relation according to the measured electric parameters. The hydraulic brake cylinder pressure estimation method and the hydraulic brake cylinder pressure estimation device on the basis of the electromechanical similarity theory have the advantages that complex processes in establishing dynamic and energy equations and building a specific hydraulic adjusting system experiment bench are omitted, a theoretical model is established by a relative simple circuit, control precision is improved, a developing period is shortened, and production cost is reduced.
Description
technical field [0001] The invention relates to the technical field of automobile wheel cylinder pressure estimation, in particular to a hydraulic brake wheel cylinder pressure estimation method and device based on electromechanical similarity theory. Background technique [0002] At present, automobile anti-lock braking system (Anti-lock Braking System, referred to as "ABS") is mainly used at home and abroad to enhance the safety of automobile braking. In the anti-lock braking system, when the solenoid valve is PWM (Pulse Width Modulation, Pulse Width Modulation) controlled during small-step boosting, small-step decompression, and pressure-holding, the wheel cylinder as the main execution unit , the brake pressure needs to be precisely adjusted, which requires feedback control of the brake pressure, and the brake pressure can only be obtained by measuring the pressure sensor or the pressure estimation algorithm. [0003] In practice, in order to reduce the system cost, pre...
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IPC IPC(8): B60T8/172B60T8/174
Inventor 李锐司洪龙刘琳杜鹏飞任德均熊秋涵
Owner CHONGQING UNIV OF POSTS & TELECOMM
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