Brake Disc Actuator Synchronization for Symmetric Parking Braking
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Solution Overview
Problem
Existing braking systems with independently controllable actuators for brake discs experience asymmetric axial thrusts due to varying actuation times, leading to potential damage and wear, particularly in disc brakes with fixed calipers.
Innovation Solution
A method and system for synchronizing the application of forces by two actuators on opposite faces of a brake disc, using an electronic processing unit to detect and synchronize the forces applied by each actuator, ensuring they reach predetermined values simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If two opposite actuators are independently controlled to apply braking force, then the braking system can be actuated and controlled at the same time independently, but asymmetric axial thrusts occur on the brake disc due to different actuation times
Solution Approach 1:
The electronic control unit receives feedback signals from detection means that detect the force applied by each actuator. Based on this feedback, the control unit synchronizes the application of braking force by adjusting the actuation timing of each actuator, ensuring that both opposite actuators apply force simultaneously to minimize asymmetric axial thrusts on the brake disc.
2Stability of the object's composition
If the actuators start the approaching step at the same time to maintain symmetry, then axial thrust on the brake disc is minimized, but wear and deterioration of mechanical components cause differences in actuation timing
Solution Approach 1:
The detection means monitor the actual force applied by each actuator and send feedback to the electronic control unit. This feedback mechanism compensates for variations caused by wear and component deterioration, allowing the system to maintain synchronized actuation and symmetry of axial thrust on the brake disc despite changes in actuator performance over time.
3Adaptability or versatility
If the actuators are independently controllable, then the braking system can be activated and deactivated by driver request, but uncertainties in starting position lead to different approaching step durations
Solution Approach 1:
The detection means detect the force applied by each actuator and provide feedback to the electronic control unit. This feedback allows the control unit to compensate for uncertainties in starting positions by adjusting the actuation timing, ensuring that both actuators apply braking force simultaneously regardless of their initial positions or manufacturing variations.
Data Source
Figure 1~2
Figure 3~4
AI summary
A method of controlling a braking system (1) of a vehicle for activating a parking-braking force actuated by the braking system (1), the method comprising the steps of actuating both the first actuator (2) approaching against the first pad to apply a first force (Fa) and the second actuator (3) approaching against the second pad to apply a second force (Fb), detecting the value of the first force (Fa) and the second force (Fb), synchronizing the application of the first force (Fa) and the second force (Fb) on the brake disc, continuing the actuation of the first actuator (2) and the second actuator (3) until a first predetermined force value (F1) is reached by the first force (Fa) and a second predetermined force value (F2) is reached by the second force (Fb), stopping the first actuator (2) and the second actuator (3) by means of the electronic processing unit (4).