Electromagnetic Flywheel Resistance Control for Cycling Simulation
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Solution Overview
Problem
Traditional stationary bicycles fail to accurately simulate the momentum and gear-shifting properties experienced when riding a road-going bicycle, lacking the dynamic resistance adjustments that mimic real cycling conditions.
Innovation Solution
An electronically controlled resistance system that adjusts the pedal resistance based on gear selection, angular velocity, acceleration, and deceleration, simulating the effects of wind resistance, tire friction, and incline, using a flywheel with a variable resistive load managed by an electromagnet and a processor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional stationary bicycles use a single-gear drivetrain with predetermined resistance levels or constant wattage operation, then the device complexity is reduced and ease of operation is improved, but the ability to simulate real road-going bicycle conditions including gear-shifting and momentum properties deteriorates
Solution Approach 1:
The patent applies dynamics by making the resistance control system adjustable and responsive to user input. The processor dynamically modifies resistive load based on selected gear, acceleration, deceleration, and angular velocity parameters, allowing the stationary bicycle to adapt its resistance characteristics to simulate real cycling conditions rather than maintaining fixed predetermined levels
Solution Approach 2:
The patent implements parameter changes by varying multiple resistance parameters including gear selection, acceleration rates, deceleration rates, and angular velocity. The processor adjusts the resistive load parameters in response to changes in these parameters, enabling the system to simulate different cycling scenarios and gear-shifting conditions that would otherwise require complex mechanical modifications
2Ease of operation
If the stationary bicycle uses fixed gear ratios and constant resistance, then the ease of operation is improved, but the training effectiveness for preparing users for real cycling conditions deteriorates
Solution Approach 1:
The patent applies self-service by having the system automatically adjust resistance parameters based on user input and detected cycling conditions. The processor monitors acceleration, deceleration, and angular velocity to automatically modulate the resistive load, eliminating the need for manual resistance adjustment while maintaining training effectiveness
Solution Approach 2:
The patent implements feedback by continuously monitoring cycling parameters including acceleration, deceleration, and angular velocity. The processor uses this feedback information to dynamically adjust the resistive load settings, creating a closed-loop control system that adapts the training conditions to match real road-going bicycle scenarios
3Measurement precision
If the system dynamically adjusts resistive load based on multiple parameters, then the simulation accuracy of momentum and gear-shifting properties is improved, but the device complexity and control system requirements increase
Solution Approach 1:
The patent applies universality by designing a multi-functional processor that handles multiple tasks including monitoring acceleration, deceleration, and angular velocity, calculating appropriate resistive load adjustments, and coordinating with the electromagnet. This single integrated control unit performs functions that would otherwise require separate dedicated systems for each parameter
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 provides a more realistic cycling experience by dynamically adjusting resistance, enhancing the simulation of road-going bicycle conditions, including gear shifts and momentum changes, thereby improving the training effectiveness and user engagement.
Implementation Method 1
using a flywheel with a variable resistive load managed by an electromagnet and a processor
Data Source
AI summary
A stationary exercise machine includes a system for electronically controlling a pedal resistance so as to simulate the riding of a road-going bicycle. The exercise machine includes a control system that monitors pedal velocity and that controls the resistive load generated by an electronically-controlled resistance mechanism. In one example, an electromagnetic device may vary a resistive load placed on a flywheel, which, in turn, varies the pedal resistance experienced by a user. When the user increases the pedal velocity, the resistance mechanism increases the resistive load. When the user decreases the pedal velocity, the resistance mechanism decreases the resistive load. In another example, the resistance mechanism varies the resistive load based on a gear selection by the user. The control system may also take into account other factors, such as the grade of the simulated ride, simulated wind resistance, or other frictional forces when calculating the resistive load.