Wiper Chattering Control via Dynamic Force Adjustment
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Solution Overview
Problem
Existing technologies fail to adequately suppress chattering in moving bodies, such as wiper systems, which can lead to vibrations and inefficiencies in surface cleaning, particularly on vehicle windows.
Innovation Solution
A semiconductor device and wiper system that includes an abnormality detection section, position detection section, and moving body controller to adjust the force or position of the wiper blades based on detected abnormalities, specifically targeting and controlling chattering by increasing pressing force and adjusting positions where chattering occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the movement speed of the wiper is increased to suppress chattering, then chattering is reduced, but the wiper may not sufficiently suppress chattering always and may not appropriately control chattering in some cases
Solution Approach 1:
The system dynamically changes the pressing force parameter of the wiper blade based on detected chattering characteristics. The abnormality detection section identifies chattering events, and the moving body controller adjusts the pressing force to an optimized value that suppresses chattering effectively and consistently across different operating conditions, rather than relying on fixed high-speed operation.
Solution Approach 2:
The system implements a feedback control mechanism where the abnormality detection section continuously monitors for chattering, detects its characteristics, and feeds this information back to the moving body controller. The controller then adjusts the pressing force in response to the detected chattering, creating a closed-loop system that reliably suppresses chattering adaptively rather than using open-loop high-speed operation.
2Object-affected harmful factors
If the pressing force of the wiper blade is increased to suppress chattering, then chattering is reduced, but the wiper may not sufficiently suppress chattering always and may not appropriately control chattering in some cases
Solution Approach 1:
The system dynamically adjusts the pressing force parameter based on real-time detection of chattering characteristics. Rather than maintaining constantly high pressing force, the abnormality detection section identifies chattering events and the moving body controller optimizes the pressing force to appropriate levels that reliably suppress chattering under varying conditions.
Solution Approach 2:
The system uses feedback control where the abnormality detection section monitors chattering and provides information to the moving body controller, which then adjusts the pressing force in response. This closed-loop approach ensures reliable and consistent chattering suppression by adapting the pressing force to actual operating conditions rather than using fixed high force.
3Object-affected harmful factors
If conventional methods are used to suppress chattering, then some chattering is reduced, but chattering may not be appropriately controlled and suppression is inconsistent
Solution Approach 1:
The system implements automated feedback control where the abnormality detection section continuously monitors for chattering and the moving body controller automatically adjusts the pressing force based on detected characteristics. This eliminates the need for manual intervention or simple fixed-parameter approaches, providing appropriate and adaptive control of chattering that consistently addresses varying operating conditions.
Solution Approach 2:
The wiper system performs self-diagnosis and self-adjustment through the abnormality detection section identifying chattering events and the moving body controller autonomously optimizing the pressing force. The system serves itself by automatically detecting and correcting chattering without external intervention, achieving appropriate control that adapts to changing conditions.
Data Source
AI summary
A semiconductor device including an abnormality detection section that detects an abnormality occurring in a moving body that moves along a specific path on a surface of a specific object; a position detection section that detects a position of the moving body as an abnormality occurrence position, in a case in which the abnormality detection section has detected an abnormality, and that stores abnormality occurrence position information expressing the abnormality occurrence position in a storage section; and a moving body controller that controls an adjusting section to adjust at least one of a force with which the moving body presses against the specific object, or a position of the moving body in a direction intersecting the surface of the specific object, based on a detection result detected by the abnormality detection section and the abnormality occurrence position information.