ABS brake anti-lock device based on DSP56F8346

Abstract

The invention provides an ABS brake anti-lock device based on DSP 56F8346. The device comprises an electric control device which takes the high-performance digital signal processor 56F8346 as a CPU, a vehicle wheel rotation speed sensor and a hydraulic system. The electric control device outputs sine wave electric signals according to the four vehicle wheel rotation speed sensors; the signals are then converted to the counting pulses in direct proportion with the wheel speed through a hardware circuit; the CPU collects the counting values and calculates the rotation speed of the four vehicle wheels; the electric control device controls the work of the hydraulic system according to a certain control principle, thus respectively implementing the anti-lock brake and control to the two front wheels respectively and the two rear wheels synchronously and implementing the safe deceleration and the stable driving of the vehicle. The ABS brake anti-lock device of the invention implements the intelligentization and the integration and has wide market application prospect.

Description

【Technical field】: [0001] The invention belongs to the technical field of automobile electronic control, and realizes an ABS braking anti-lock braking device based on DSP56F8346. 【Background technique】: [0002] ABS brake anti-lock braking device is a kind of vehicle active safety device, which is used to brake and control the moving means of transportation. It is widely used in road transportation such as cars, motorcycles, passenger cars and trucks, trains, railway transportation and aircraft transportation. It is an important equipment in electronic control. [0003] The brake anti-lock braking system was first used on trains in the early 20th century to prevent local friction caused by the locking of steel wheels when the train was braking, and the heat concentration caused early failure and damage of wheels and rails. Later, the ABS device was applied to the aircraft to prevent the brakes from drifting or falling forward after landing, and shorten the taxiing distance....

AI Technical Summary

Problems solved by technology

[0005] The existing ABS brake anti-lock braking device mainly adopts a control algorithm based on threshold value control with angular velocity as the control parameter. The various threshold values ​​and pressure holding time of the algorithm are obtained through repeated tests under different road conditions. There is no clear theoretical basis for empirical values, and the control quality is difficult to guarantee; and the control algorithm is an open-loop control, which requires a lot of financial and material resources to pass relevant empirical data, and the cost is relatively high

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