Load Transport Cable Control Using Precalculated Length Lookup
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Solution Overview
Problem
Existing load transport devices face computational complexity in determining desired cable lengths for positioning cables due to geometric and kinematic redundancies, requiring complex real-time calculations.
Innovation Solution
A method involving a database that stores precalculated desired cable lengths for various target points and load values, allowing direct lookup to determine cable lengths, reducing computational load and enabling rapid, reliable adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If real-time calculations are performed to determine desired cable lengths for positioning cables, then positioning accuracy can be maintained, but computational complexity increases significantly due to geometric and kinematic redundancies
Solution Approach 1:
The patent pre-calculates and stores desired cable lengths for various target positions and load conditions in a database before actual operation. During runtime, the control device simply retrieves pre-computed values based on current target coordinates and measured load, avoiding complex real-time calculations while maintaining positioning accuracy
Solution Approach 2:
The patent creates a simplified digital model (database) that copies the essential relationships between target positions, load conditions, and required cable lengths. This database serves as a pre-computed reference that replaces complex geometric and kinematic calculations during actual operation
2Productivity
If precalculated desired cable lengths are stored in a database for direct lookup, then computational load is reduced and response time is improved, but system complexity increases due to database storage requirements
Solution Approach 1:
The patent replaces the mechanical computation process (real-time geometric and kinematic calculations) with a data retrieval process (database lookup). This substitution transforms complex computational operations into simple data access operations, significantly improving response time while the database structure remains manageable
3Measurement precision
If complex real-time calculations are performed to account for changing loads and obstacles, then positioning accuracy is maintained, but the system becomes less adaptable to rapid changes
Solution Approach 1:
The patent implements a feedback mechanism where the load measuring device continuously monitors actual load conditions, and the control device uses this feedback to query the database for updated cable length values. This closed-loop system maintains positioning accuracy while adapting rapidly to changing loads and obstacles
Solution Approach 2:
The patent creates a dynamic system where the database can be updated with new pre-calculated values for different target positions and load conditions. The system adapts to changing conditions by retrieving appropriate pre-computed values based on current state, enabling rapid response without complex real-time calculations
Data Source
AI summary
A method for controlling a movement of a load in a workspace by a control device, including a) acquiring target coordinates to be set of a target point in the workspace towards which a load pick-up apparatus is to be moved, b) determining a load measured value by measuring the weight of the load using a load measuring device, c) determining actual cable lengths of positioning cables, d) determining desired cable lengths to be set by the respective positioning cable winch, for the positioning cables for the target coordinates of the target point to be set and for the current load measured value, and for each of the positioning cables, the control device searches a database for a data set that matches the target coordinates of the target point that are to be set and the current load measured value, and determines the desired cable length to be set.