Knee Exoskeleton Interface for Torque Assistance and Feedback
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Solution Overview
Problem
Existing exoskeleton systems lack efficient and comfortable integration with the human body, particularly in providing torque assistance at the knee joint, and do not effectively utilize interactive software for user input and feedback.
Innovation Solution
A leg brace with integrated actuation and adjustable fluidic actuators that provide torque assistance at the knee joint, combined with interactive software for user input and feedback, allowing real-time control and feedback mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If traditional exoskeleton systems are used, then structural support is provided, but torque assistance at the knee joint is insufficient and integration with the human body is uncomfortable
Solution Approach 1:
The exoskeleton system is divided into modular components including a hip exoskeleton device, knee exoskeleton device, and ankle exoskeleton device that can be independently adjusted and optimized. Each module can be separately controlled to provide targeted torque assistance while maintaining overall system comfort and adaptability to individual user anatomy.
Solution Approach 2:
The exoskeleton employs dynamic control mechanisms that adjust torque assistance in real-time based on user movement, load conditions, and physiological feedback. The system transitions between different operational modes (passive, active, semi-active) to optimize both force delivery and comfort during various activities.
2Ease of operation
If complex feedback systems are added to improve user interaction, then real-time control is enhanced, but device complexity increases
Solution Approach 1:
The system incorporates multiple feedback mechanisms including force sensors, position encoders, and physiological sensors that provide real-time data to the control unit. This enables closed-loop control where the exoskeleton automatically adjusts its assistance based on user needs, improving interaction without requiring complex user interfaces.
Solution Approach 2:
The control system operates autonomously by processing sensor data and making real-time decisions about torque delivery without requiring constant user input. The system self-regulates based on detected movement patterns, load conditions, and physiological signals, reducing the complexity of user interaction while maintaining sophisticated control.
Data Source
AI summary
An exoskeleton system comprising at least one leg actuator unit configured to be coupled to leg of a user, the leg actuator unit including: an upper arm and a lower arm that are rotatably coupled via a joint, the joint positioned at a knee of the user with the upper arm coupled about an upper leg portion of the user above the knee and with the lower arm coupled about a lower leg portion of the user below the knee, a leg-actuator-unit user interface comprising a plurality of input and feedback elements, and an actuator that extends between the upper arm and lower arms.