Crane Super-Lifting Radius Control with PID Winch Coordination
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Solution Overview
Problem
Existing crane systems require high operating skills for manual adjustment of the super-lifting radius, leading to inaccurate adjustments and low efficiency.
Innovation Solution
A crane super-lifting radius control method that automatically adjusts the super-lifting radius based on physical state information, including boom and super-lifting boom angles, tensions, and pressures, using PID control to ensure accurate adjustment of the super-lifting radius.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of handles is used to adjust super-lifting radius, then the operator has control over the adjustment process, but the adjustment accuracy is low and operation efficiency is reduced
Solution Approach 1:
The patent replaces the manual mechanical handle operation with an automated electronic control system. The controller receives signals from the operation handle and automatically controls the winches to adjust the super-lifting radius, eliminating the need for manual coordination and significantly improving adjustment accuracy while maintaining operational control through the electronic interface.
2Productivity
If manual switching between handles is used, then the operator can adjust the super-lifting radius, but the operation efficiency is low and requires high operating skill
Solution Approach 1:
The system performs self-adjustment by automatically controlling both the main luffing winch and super-lift luffing winch through a single operation handle. The controller coordinates the winch operations autonomously based on the handle signals, eliminating the need for the operator to manually switch between handles or possess high-level coordination skills, thereby improving efficiency and ease of operation.
3Measurement precision
If automatic control is implemented to improve adjustment accuracy, then the super-lifting radius can be adjusted precisely, but the system complexity increases
Solution Approach 1:
The patent integrates the control of two separate winches (main luffing winch and super-lift luffing winch) into a single automated control system managed by one controller. This merging of control functions reduces the overall system complexity compared to having separate manual control mechanisms for each winch, while achieving precise adjustment through coordinated automated operation.
Data Source
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AI summary
A crane super-lifting radius control method and system, and a crane. The crane super-lifting radius control method comprises: obtaining physical state information of a boom frame and a super-lifting boom (11); receiving first input of a user; in response to the first input, determining a target super-lifting radius; and adjusting a super-lifting radius on the basis of the targe super-lifting radius and the physical state information when the physical state information of the boom frame and the super-lifting boom (11) is suitable for an adjustment to the super-lifting radius. According to the crane super-lifting radius control method and system, and the crane, upon determining that the boom frame and the super-lifting boom (11) are suitable for an adjustment to the super-lifting radius, an angle of the super-lifting boom (11) is automatically adjusted by combining the physical state information of the boom frame and the super-lifting boom (11) with the target super-lifting radius inputted by the user, and thus, the auto-adjustment to the super-lifting boom (11) can be implemented, the adjustment to the super-lifting radius is more accurate, and the efficiency is improved.