Brake force real-time adjusting method based on brake-by-wire system and adjusting device

Abstract

The invention provides a brake force real-time adjusting method based on a brake-by-wire system. The brake force real-time adjusting method comprises following steps: respectively obtaining objective position signal values of motors in various electronic and mechanical brakes of front wheels and / or rear wheels of a brake vehicle according to strokes of electronic brake pedals; respectively acquiring actual position signal values, actual rotation speed signal values and actual current signal values of the motors in real time; and respectively realizing real-time closed-loop control for positions, rotation speeds and current of the motors according to deviation between the objective position signal values and the actual position signal values of the motors, the actual rotation speed signal values and the actual current signal values, and accordingly adjusting actually outputted brake force of the electronic and mechanical brakes with the motors in real time. Correspondingly, the invention provides a brake force real-time adjusting device. The brake force real-time adjusting method and the adjusting device can suppress fluctuation generated when brake force is adjusted in real time in the prior art, stability of the brake-by-wire system is improved, and a braking effect is good.

Description

technical field [0001] The invention belongs to the technical field of brake by wire (Brake by wire), and in particular relates to a real-time adjustment method for braking force based on a brake by wire system and a real-time adjustment device for brake force based on a brake by wire system. Background technique [0002] With the development of automobile technology, people put forward higher requirements for the power, economy, safety, maneuverability and comfort of automobiles, and the mechanical systems in automobiles are gradually converting to electromechanical systems. [0003] In the brake-by-wire system, the electronic brake pedal and multiple electromechanical brakes (EMB, Electro Mechanical Brake) respectively arranged on the front and rear wheels of the vehicle are generally used to complete the braking operation. The driver steps on the electronic brake pedal to generate Pedal displacement signal, through which the braking force acting on the front and rear whee...

AI Technical Summary

Problems solved by technology

However, in the process of real-time adjustment of the braking force output by the electronic mechanical brake using the above method, due to the large fluctuation of the actual current of the motor in the electronic mechanical brake, the adjustment of the braking force output by the electronic mechanical brake is not accurate enough, thus As a result, the brake-by-wire brake system where the electronic mechanical brake is located has low braking accuracy and poor braking effect, which seriously affects the braking performance of the vehicle, and the braking performance of the vehicle will directly affect the safety of the vehicle ; At the same time, the self-inductance, mutual inductance, damping coefficient, moment of inertia, etc. of the windings of the motor in the electromechanical brake will be uncertain as the load changes, resulting in fluctuations and instability in the braking process of the brake. However, only the existing PID controller cannot suppress the fluctuation and instability of the brake during the braking process, resulting in the instability of the brake-by-wire brake system where the brake is located, which further affects its braking effect

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