Commercial Vehicle Controller Design And Algorithm Research For Electronic Braking System

The intelligent safety control of commercial vehicles in specific scenarios is expected to lead the further development of intelligent vehicle technology to application,and the Electronic Braking System(EBS)is one of its core technologies.The electronic brake system is subject to system complexity and foreign technology blockade,which has become a bottleneck problem restricting the development of smart cars in our country.In view of the current electronic brake system research and development challenges,this article takes the core executive component of the commercial vehicle electronic brake system—single/dual channel electronic pressure control module as the research object,to improve the response time of the system and achieve precise control of the brake pressure as the goal.Through in-depth exploration and analysis of its working characteristics,the focus is on the study of its pressure control mechanism,based on which the corresponding pressure control algorithm and hardware controller are designed,and the experimental bench is built for verification.The main content of the paper is as follows:First of all,the overall operating mechanism of the system is clarified by analyzing the system working principle,architecture layout and function of each component of a typical electric control product.On this basis,a mathematical model of the valve body and the solenoid valve part is established for the pressure control module,and the electromagnetic characteristics of the solenoid valve and the pressure regulation characteristics of the entire module are analyzed based on the model.Secondly,designed a method that can optimize the pressure control of the pressure control module.The algorithm combines the advantages of model prediction and proportional control to adjust the brake pressure in sections according to different control conditions to shorten module response time and improve brake pressure control accuracy.And the effectiveness of the algorithm is verified by Matlab/Simulink simulation.Third,based on the analysis of the pressure control module working characteristics,according to the specific needs of the pressure control module when working,the corresponding pressure control module hardware controller is designed.The design of the basic circuit mainly includes the development of the microcontroller and the design of the power supply module;the functional circuit mainly includes a series of functional modules such as the solenoid valve drive circuit,the sensor analog signal acquisition circuit,the CAN communication circuit,and the wheel speed acquisition circuit.Finally,built a hardware-in-the-loop experiment bench,and verified the designed pressure control algorithm through bench experiments.Multiple sets of experiments were designed to verify the response of the module under different air source pressure conditions,and compared with the traditional pressure control method to verify that the designed algorithm can effectively improve the pressure control accuracy and reduce the braking response delay.The multi-functional electronic hardware controller designed in this paper can realize multi-channel signal acquisition and processing,high-power load driving and external communication.And for the first time,the control algorithm of the pressure control module is designed by using model predictive control and segmented control.The simplified model built greatly reduces the amount of calculation,and the segmented adjustment method can maximize the advantages of different methods,which can provide a certain reference for applications in other fields.