Motor-Controlled Cable Resistance for Asymmetric Strength Training
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Solution Overview
Problem
Existing strength training methods struggle to efficiently and safely implement asymmetric protocols, such as eccentric loading, due to the limitations of physical weights and the challenge of maintaining proper form and timing.
Innovation Solution
A digital strength trainer system that uses a motor controlled by a filter to dynamically adjust torque, allowing for arbitrary applied tension curves and phase control, thereby mimicking the behavior of a weight stack or other resistance sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If physical weights are used for strength training, then the training can be performed with simple equipment, but it is difficult to implement asymmetric protocols and maintain proper form and timing
Solution Approach 1:
The patent replaces the mechanical weight stack system with an electronically controlled motor system. The motor is controlled by a filter that dynamically adjusts torque output, enabling precise control of resistance throughout the range of motion. This electronic control system allows implementation of asymmetric protocols (different resistance during concentric and eccentric phases) and provides feedback mechanisms to maintain proper form and timing, resolving the limitations of traditional mechanical weight systems.
Solution Approach 2:
The patent implements a dynamic resistance system where the motor torque is continuously adjusted based on the exercise phase and user performance. The filter controlling the motor dynamically modifies the applied tension curve to match desired training protocols, allowing transition between different exercise modes (concentric, eccentric, isometric) and adjustment of resistance levels in real-time, thereby enabling asymmetric protocols that are impossible with static physical weights.
2Manufacturing precision
If a motor controlled by a filter is used to dynamically adjust torque, then precise control of tension and phase is achieved, but the device complexity increases
Solution Approach 1:
The patent introduces a filter as an intermediary component between the motor control system and the user exercise. This filter processes sensor data about user performance and translates it into appropriate motor torque commands. The filter acts as a mediator that implements the training protocol logic, managing the complexity of coordinating multiple sensors, motors, and control algorithms while providing a simplified interface for protocol implementation and adjustment.
3Productivity
If asymmetric protocols are implemented with physical weights, then the training effectiveness may be improved, but the safety and efficiency are compromised due to form and timing challenges
Solution Approach 1:
The patent implements a feedback control system using sensors to monitor user position, velocity, and applied force throughout the exercise. This feedback is processed by the filter to dynamically adjust motor torque, ensuring the user maintains proper form and timing even during asymmetric protocols. The real-time feedback mechanisms detect deviations from correct technique and provide corrective resistance adjustments, thereby maintaining safety and efficiency while enabling advanced training protocols that improve training effectiveness.
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
Enables efficient, safe, and effective strength training by allowing for precise control of tension and phase, facilitating asymmetric protocols and personalized workout experiences.
Implementation Method 1
a motor controlled by a filter to dynamically adjust torque
Data Source
AI summary
An information related to the position of an actuator coupled to a cable which is coupled to a motor is received. A filter is used to provide an input to a motor controller coupled to the motor, to adjust torque on the motor such that a strength curve is implemented relative to the position of the actuator.