Dual Actuator Profile Learning for Opposite Sliding Doors
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Solution Overview
Problem
Existing sliding door systems for vehicles require multiple rails and components, increasing vehicle weight and reducing design freedom, and dual actuators operating in opposite directions often result in a stall state preventing complete opening or closing of doors.
Innovation Solution
A profile learning system and method for cooperative control of dual actuators, using a first position sensor, spindle assembly, motors, memory unit, and control unit to adjust motor outputs and determine learning success or failure for complete door opening or closing, even when actuators operate in opposite directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If three rails (upper rail, center rail, and lower rail) are used to support the sliding door, then the door can be stably supported during opening and closing, but the vehicle weight increases and the number of components increases
Solution Approach 1:
The patent removes the upper rail from the traditional three-rail configuration, retaining only the center rail and lower rail. This extraction of the unnecessary component reduces vehicle weight and component count while maintaining adequate door support stability through the remaining two rails working in coordination with the dual actuator system.
2Reliability
If two actuators operate in opposite directions for opening and preventing door movement, then door security is improved, but a stall state occurs preventing complete opening or closing
Solution Approach 1:
The control unit performs preliminary detection of the stall state condition before it fully develops. When the stall state is detected (through current sensors or position sensors monitoring actuator behavior), the control unit preemptively adjusts the output of one or both actuators to resolve the conflict, allowing the door to complete its opening or closing motion while maintaining security functionality.
Solution Approach 2:
The system implements feedback control by continuously monitoring the operational state of both actuators during door movement. When the stall state is detected through sensor feedback (current, position, or force sensors), the control unit adjusts the actuator outputs in real-time to resolve the mechanical conflict, enabling complete door opening or closing while maintaining the security function.
3Ease of operation
If dual actuators are used for cooperative control, then complete opening or closing can be achieved, but the control complexity increases
Solution Approach 1:
The control unit autonomously manages the coordination between the two actuators without requiring complex external control systems. The control algorithm automatically detects stall states, determines which actuator needs adjustment, and modifies outputs accordingly, allowing the system to self-regulate and complete door operations despite the presence of dual actuators operating in opposite directions.
Data Source
AI summary
A profile learning system for cooperative control of a dual actuator applied to opposite sliding doors may include a first position sensor configured to detect a position of a door that operates in a first direction along a rail; a spindle assembly including a spindle that operates in a second direction with respect to the door to prevent the door from rattling; first and second motors engaged to the door and the spindle assembly and configured to provide driving power to the door and the spindle assembly, respectively; a memory unit configured to store the position of the door; and a control unit configured to adjust an output of the second motor configured for a predetermined time period and to determine learning success or learning failure for complete opening or closing of the door based on the position of the door when a stall state is detected due to a difference in stroke between the first motor and the second motor.