Servo Drive Load Characterization via Position-Dependent Lookup Tables
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Solution Overview
Problem
Designing motion control systems for mechatronic systems is challenging due to dynamic parameters like compliance and backlash, requiring empirical testing and cumbersome data exchange between CAD and analysis systems, which slows down simulation processes.
Innovation Solution
Characterizing mechanical loads as a function of position using a position-dependent load table, allowing for decoupling of simulation from CAD systems and decomposition of loads into subparts based on user-defined criteria, facilitating rapid simulations and optimizing system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If empirical testing and data exchange between CAD and analysis systems are used to characterize loads, then measurement precision is improved, but loss of time increases due to cumbersome iterative processes
Solution Approach 1:
The patent pre-calculates and stores load characteristics as lookup tables during system setup, eliminating the need for time-consuming iterative data exchange during simulation. The load tables are prepared in advance with position-dependent load values that can be quickly referenced during runtime without requiring repeated CAD-system analysis exchanges.
Solution Approach 2:
The patent creates simplified copy representations of complex load behaviors in the form of lookup tables that approximate the true load characteristics. These table-based representations capture the essential position-dependent load behavior without requiring the full complexity of the original CAD models, enabling fast simulation while maintaining sufficient accuracy.
2Measurement precision
If CAD systems and analysis engines operate simultaneously with incremental data exchange, then measurement precision is maintained, but device complexity increases due to synchronization requirements
Solution Approach 1:
The patent extracts the load characterization data from the complex iterative CAD-analysis exchange process and consolidates it into standalone lookup tables. This separation allows the simulation system to use pre-prepared load data without requiring active connection or synchronization with the CAD system, significantly reducing integration complexity.
Solution Approach 2:
The patent introduces lookup tables as an intermediary layer between the CAD system and the analysis engine. These tables serve as a static bridge that translates complex CAD model information into simplified position-dependent load values, eliminating the need for direct real-time communication and synchronization between the two systems.
3Productivity
If position-dependent load tables are used to decouple simulation from CAD systems, then productivity is improved through rapid simulation, but manufacturing precision may be reduced due to simplified load models
Solution Approach 1:
The patent transforms the load model from a continuous function requiring complex calculations into a discrete set of parameter values stored in lookup tables. By pre-calculating load values at discrete position points and interpolating between them during simulation, the system achieves both computational speed and sufficient accuracy for design iterations.
Data Source
AI summary
Systems and methods that characterizes a load as a function of position/movement of mechanical components—as induced by such load in the servo-drive system. By running a plurality of motion profiles, corresponding torque/forces that generate such motions can be calculated and readily represented (e.g., as a table) in form of a position dependent load. In addition, a parsing component can decompose or break up a load (which generates a desired motion) to its subparts or constituent values for further simulation analysis.