Vehicle Door Assist Control Using Velocity-Based Power Correction
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Solution Overview
Problem
Existing door opening and closing assisting apparatuses face challenges in achieving favorable operability while maintaining a simple apparatus configuration, as they rely on a limited number of parameters for control logic, which can lead to suboptimal performance and user experience.
Innovation Solution
A door opening and closing assisting apparatus that includes an information obtainer, a door actuator, a target assisting power computer, and a controller, which calculates and adjusts the assisting power based on door velocity, openness degree, and vehicle tilt to ensure optimal operation with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the assisting apparatus uses a limited number of parameters for control logic, then the configuration remains simple and easy to manufacture, but the operability and performance become suboptimal
Solution Approach 1:
The patent applies parameter changes by computing assisting power based on multiple dynamic parameters including door opening/closing velocity, door openness degree, and vehicle tilt angle. This allows the system to adapt to varying operational conditions and achieve optimal performance without increasing physical configuration complexity. The controller dynamically adjusts the assisting power instruction value by synthesizing these parameters, resolving the contradiction between simple configuration and high operability.
2Ease of operation
If the apparatus computes assisting power based on multiple parameters including velocity and openness degree, then operability improves, but the control logic and computation complexity increase
Solution Approach 1:
The patent implements dynamics by making the control system adaptive to changing door states and vehicle conditions. The controller continuously monitors door velocity, openness degree, and vehicle tilt, then dynamically computes the assisting power instruction value. This dynamic approach allows the system to respond appropriately to different operational phases (opening vs. closing, slow vs. fast movement) without requiring overly complex static control logic.
Solution Approach 2:
The system employs feedback mechanisms by using sensors to detect door velocity and openness degree, then feeding this information back to the controller for real-time computation of assisting power. The controller adjusts the motor output based on this feedback loop, ensuring optimal assistance throughout the door operation. This feedback-based control achieves high operability while keeping the control logic structured and manageable.
3Ease of operation
If the motor applies high assisting power to maintain door velocity, then door operation becomes smoother, but energy consumption increases
Solution Approach 1:
The patent applies partial action by computing the minimum necessary assisting power required to maintain desired door velocity and overcome friction forces. Rather than applying maximum power continuously, the controller calculates the precise amount of assistance needed based on current door state and vehicle conditions. This approach ensures smooth door operation while avoiding excessive energy consumption by providing only the necessary level of assistance at each moment.
Data Source
AI summary
A door opening and closing assisting apparatus includes: an information obtainer that obtains information on an opening and closing velocity of a door on a vehicle; a door actuator that performs driving for assisting the opening and closing operation of the door; a target assisting power computer that computes a target assisting power for assisting the opening and closing operation of the door; and a controller that performs driving control for the door actuator based on the target assisting power. The target assisting power computer calculates, based on the opening and closing velocity of the door obtained by the information obtainer, a standard assisting power which is assisting power required to maintain the opening and closing velocity, makes a correction by decreasing the calculated standard assisting power according to a predetermined rule, and sets the standard assisting power after the decrease correction as the target assisting power.