Bilateral Force Assistance Control for Abnormal Gait Support
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Solution Overview
Problem
Force applying auxiliary devices struggle to provide adaptive support during non-preset motions, such as unbalanced walking or carrying heavy objects, leading to abnormal behavior and insufficient assistance.
Innovation Solution
A force applying auxiliary device equipped with sensors on both sides, a processor, and a force driver that collects motion posture data to determine imbalances and adjusts force magnitudes dynamically, using preset abnormal patterns to enhance support and assistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the force applying auxiliary device uses preset motion patterns to assist user movements, then it can provide reliable support for normal motions, but it cannot adapt to abnormal motions such as unbalanced walking or carrying heavy objects
Solution Approach 1:
The patent implements dynamic motion pattern recognition by transitioning from static preset patterns to real-time analysis of user motion data. The system continuously monitors motion parameters through sensors and dynamically adjusts force application based on detected abnormal patterns, enabling adaptation to unbalanced walking, carrying heavy objects, and other non-preset motions while maintaining reliability through systematic classification and response protocols
Solution Approach 2:
The patent employs feedback mechanisms by using sensors to detect user motion states and feeding this information back to the control system. The system analyzes motion posture data, compares it against normal patterns, and adjusts force application in real-time based on the detected abnormality type and severity, creating a closed-loop control system that adapts to changing user needs
2Adaptability or versatility
If the force applying auxiliary device applies fixed force magnitudes according to preset patterns, then it simplifies control logic, but it cannot provide appropriate force adjustment for different abnormal situations
Solution Approach 1:
The patent changes force application parameters dynamically based on detected motion patterns. Instead of fixed force magnitudes, the system adjusts force parameters (magnitude, direction, timing) according to the type of abnormal motion detected, such as applying asymmetric forces for unbalanced walking or modified force profiles for carrying heavy objects, while maintaining manageable complexity through parameterization of force patterns
Solution Approach 2:
The patent segments the control logic into distinct modules: motion detection, pattern recognition, abnormality classification, and force application control. This segmentation allows each module to handle specific tasks independently, managing overall system complexity while enabling sophisticated force adjustment capabilities for different abnormal situations
3Ease of operation
If the force applying auxiliary device does not distinguish between different abnormal motion patterns, then it reduces processing complexity, but it cannot provide targeted assistance for specific abnormalities
Solution Approach 1:
The patent performs preliminary classification of motion patterns by pre-defining characteristic features of different abnormal motions (unbalanced walking, carrying heavy objects, etc.). The system prepares classification rules and response protocols in advance, enabling quick identification and targeted assistance without complex real-time analysis, thus improving ease of operation while managing analysis complexity through pre-processing
Data Source
AI summary
A force applying auxiliary device and a control method thereof are provided. The force applying auxiliary device includes a sensor group, a processor, and a force applying driver. The sensor group includes a first sensor disposed on a first side and a second sensor disposed on a second side. The processor collects motion posture data of a user according to the first sensor and the second sensor, and determines whether a motion of the user is abnormal. When determining that the motion of the user is abnormal, the processor selects at least one preset abnormal pattern as a specific abnormal pattern according to the motion posture data, and controls the force applying driver to provide a force by using the specific abnormal pattern. A force difference between first and second forces applied to first and second side feet is adjusted based on a difference in sampling values between the sensors.