Door Closing Drive Control With Adaptive Damping Trajectories
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Solution Overview
Problem
Existing door closing systems lack adaptability to varying usage scenarios and environmental conditions, leading to inconsistent user experience and accessibility.
Innovation Solution
A control device that determines a target trajectory for the door closing movement based on specified parameters such as time, usage frequency, environmental conditions, and previous opening processes, allowing for dynamic adjustment of the closing behavior to enhance comfort and accessibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed closing trajectory is used, then the control system is simple, but the door closing behavior cannot adapt to different usage scenarios and environmental conditions
Solution Approach 1:
The patent implements dynamic trajectory selection by providing multiple predefined closing trajectories (first, second, third trajectories) that can be selected based on detected usage scenarios and environmental conditions. The control unit dynamically switches between these trajectories to optimize door closing behavior for different situations, such as rapid closing for security scenarios or slow closing for accessibility scenarios, thereby resolving the contradiction between adaptability and control complexity.
2Productivity
If the door closes rapidly, then productivity is improved, but ease of operation deteriorates due to reduced accessibility
Solution Approach 1:
The system dynamically adjusts closing speed by selecting from multiple trajectories based on detected conditions. For accessibility scenarios (e.g., when sensors detect obstacles or specific time periods), the system selects slower trajectories that allow easier operation. For high-productivity scenarios (e.g., security requirements or low-traffic periods), faster trajectories are selected. This dynamic adjustment resolves the contradiction between productivity and ease of operation.
Solution Approach 2:
The patent changes the temporal parameters of the closing process by providing trajectories with different time characteristics (rapid, moderate, slow closing times). The control unit selects appropriate trajectories based on usage frequency detection and environmental conditions, thereby adjusting the closing speed parameter to balance productivity requirements with accessibility needs for different user groups.
3Reliability
If maximum damping is applied throughout the closing process, then reliability is improved, but energy consumption increases
Solution Approach 1:
Instead of applying maximum damping throughout the entire closing process, the system applies damping selectively based on the selected trajectory and usage scenario. For trajectories requiring rapid closing, less damping is applied to reduce energy consumption. For scenarios requiring precise position control or safety, maximum damping is applied only during critical phases. This partial application of damping resolves the contradiction between reliability and energy consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system ensures consistent and comfortable door closing behavior by adapting to different situations, improving ease of use and accessibility by dynamically adjusting the closing speed and time based on various factors.
Implementation Method 1
an electric motor operable as a generator and coupled to an actuating element of the drive unit
Data Source
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AI summary
A drive unit for closing a door or window sash comprises an energy storage device for providing a closing force to close the sash, a damping device to counteract the closing force, which includes an electric motor that can be operated as a generator and coupled to an actuating element of the drive unit, and a control device for controlling the electric motor. The control device is configured to define a target path that specifies a position of the sash or a closing speed of the sash as a function of time, and to control the electric motor to dampen the closing movement of the sash according to the defined target path.