Rider Posture Control With Motion Feedback Fault Detection
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Solution Overview
Problem
Human-powered vehicle rider-posture changing devices face issues with excessive resistance, hydraulic structure malfunctions, and detection unit malfunctions, which affect proper operation and positioning of the rider.
Innovation Solution
A rider-posture changing device comprising a first member, a second member, a detector, and a controller that detects position information and calculates movement information, including velocity and acceleration, to determine unusual states and malfunctions, and adjusts the hydraulic structure accordingly to ensure proper operation and target positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rider-posture changing device operates without monitoring, then the device structure remains simple, but unusual states such as excessive resistance, hydraulic-structure malfunction, and detection-unit malfunction cannot be identified
Solution Approach 1:
The controller continuously monitors movement information from the detector and compares it against expected ranges to detect unusual states. This feedback mechanism enables real-time identification of excessive resistance, hydraulic malfunctions, and detection unit failures without requiring complex additional hardware beyond the existing detector and controller integration.
Solution Approach 2:
The system uses its own existing detector to monitor its operational state by analyzing movement information of the second member. The controller self-diagnoses unusual states by evaluating whether detected movement patterns fall within normal operational ranges, eliminating the need for separate monitoring systems.
2Manufacturing precision
If the second member stops at any position, then the device operation is simple, but the rider cannot achieve proper target positioning for optimal posture
Solution Approach 1:
The controller receives continuous position feedback from the detector and compares the second member's position against target positions. When the detected position matches a target position within acceptable tolerance, the controller confirms proper positioning. This feedback loop ensures accurate rider posture adjustment while maintaining simple operation through automatic positioning control.
3Reliability
If movement information is not monitored, then the system operates with fewer processing requirements, but unusual states and malfunctions cannot be determined
Solution Approach 1:
The controller utilizes movement information already being collected by the detector for position control purposes. By reusing this existing data for anomaly detection rather than implementing separate sensing systems, the controller achieves reliable malfunction detection while minimizing additional energy consumption. The same detection hardware serves dual purposes: position control and fault diagnosis.
Data Source
AI summary
A rider-posture changing device for a human-powered vehicle comprises a first member, a second member, a detector, and a controller. The second member is configured to be movable relative to the first member. The detector is configured to detect position information of the second member relative to the first member. The controller is configured to obtain movement information of the second member relative to the first member based on the position information.