Trim Device Angle Control for Water Propeller Limit Protection
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Solution Overview
Problem
The manual control of trim devices in water propellers is complex and prone to errors, leading to potential safety hazards due to inaccurate judgment of the limit protection mode entry and exit, resulting in physical damage to the mechanism.
Innovation Solution
A control method and device that automatically control the trim device to trim up to a limit angle, maintaining the trim-up state until reaching a limit protection mode, reducing user operation complexity and improving safety by setting entry and limit angles with preset margins to account for sensor inaccuracies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control is used to operate the trim device, then the user can directly control the trim device, but the operation complexity increases and errors may occur due to inaccurate judgment of limit protection mode entry and exit
Solution Approach 1:
The trim device automatically detects its own trim angle and autonomously determines when to enter or exit the limit protection mode based on pre-set angle thresholds. The control system self-monitors the trim angle via sensors and automatically switches modes without requiring user judgment or manual intervention, thereby reducing operation complexity while maintaining high reliability.
Solution Approach 2:
The system continuously monitors the trim angle through sensors and provides real-time feedback to the control unit. Based on this feedback, the control unit automatically adjusts the trim device's operation and determines mode transitions. This closed-loop feedback mechanism ensures accurate judgment of limit protection mode entry and exit, eliminating errors associated with manual control.
2Ease of operation
If manual control is used, then the user can control the trim device, but safety hazards may arise from misjudgment leading to physical damage to the mechanism
Solution Approach 1:
The system pre-establishes safe operating boundaries by setting entry and exit angles for the limit protection mode before operation begins. These pre-defined thresholds prevent the trim device from reaching dangerous positions that could cause physical damage. The control system proactively activates protection mode before harmful conditions can occur, eliminating the need for users to make safety-critical judgments.
Solution Approach 2:
The trim device autonomously monitors its own position and automatically enters the limit protection mode when approaching unsafe trim angles. This self-protective capability eliminates reliance on user judgment, ensuring that safety mechanisms are consistently applied and preventing physical damage through automated boundary enforcement.
3Ease of operation
If automatic control with entry angle and limit angle is implemented, then operation complexity is reduced and safety is improved, but the device requires more complex control logic and angle detection mechanisms
Solution Approach 1:
The system manages complexity by focusing on a single critical parameter - the trim angle. All control decisions, including mode transitions between normal operation and limit protection, are based solely on comparing the detected trim angle against pre-set threshold values. This parameter-centric approach simplifies the control logic despite the automated functionality, as the system only needs to monitor one angle parameter and apply straightforward threshold-based decision rules.
Data Source
AI summary
A trim device and a control method thereof, a water propeller, water mobile device and a medium, are provided. The control method comprises: controlling the trim device to trim up and obtaining a trim angle of the trim device when receiving a trim-up command. When the trim angle reaches an entry angle, maintaining a trim-up state of the trim device until the trim angle reaches a limit angle. The limit angle is greater than the entry angle, and the trim device is in a limit protection mode when the trim angle reaches the limit angle.