Aware Active Features for CAD Model Integrity
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Solution Overview
Problem
In 3D feature-based CAD modeling systems, managing and updating features can be challenging due to parent/child relationships and reference dependencies, leading to difficulties in maintaining successful updates, especially when changes are made to the model, as users must manually reorder features to accommodate geometric constraints and ensure valid references.
Innovation Solution
The implementation of 'aware and active features' that can self-repair by reordering sequences, changing parameters, or modifying references, allowing features to automatically correct undesirable conditions such as update failures, missing references, or invalid geometry, thereby reducing user intervention and enhancing system usability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If features are manually reordered to accommodate geometric constraints and ensure valid references, then model update reliability is improved, but user time and operational complexity increase
Solution Approach 1:
The system automatically detects and resolves feature ordering issues without requiring user intervention. The computer identifies when features are in an invalid order based on geometric constraints and reference dependencies, then autonomously reorders them to ensure successful model updates, making the system self-correcting and eliminating manual time investment.
Solution Approach 2:
The system implements a feedback mechanism where the computer continuously monitors feature definitions, geometric constraints, and reference validity. When update failures or invalid conditions are detected, the system provides feedback about the specific issues and automatically applies corrections, creating a closed-loop system that maintains reliability without user involvement.
2Reliability
If features are manually reordered to accommodate geometric constraints and ensure valid references, then model update reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-service by automatically detecting invalid feature orders and reordering features to satisfy geometric constraints and reference dependencies. This eliminates the need for users to understand complex feature relationships or manually adjust ordering, maintaining high reliability while significantly improving ease of operation.
Solution Approach 2:
The computer acts as an intermediary between feature definitions and model updates, automatically managing the complex ordering relationships. Users interact with a simplified interface while the system handles the intricate logic of feature dependencies, geometric constraints, and reference validation in the background.
3Reliability
If extensive user oversight is required to manage feature updates, then model integrity can be maintained, but productivity decreases
Solution Approach 1:
The system maintains model integrity through self-service mechanisms that automatically validate feature definitions, check geometric constraints, verify reference dependencies, and reorder features as needed. This eliminates the need for extensive user oversight while preserving model integrity, thereby significantly improving productivity by allowing users to focus on design rather than feature management.
Solution Approach 2:
The patent replaces the manual mechanical process of feature ordering and validation with an automated computational system. The computer algorithms substitute for user actions in detecting and resolving ordering issues, maintaining model integrity through automated checks and corrections, which dramatically increases productivity by eliminating repetitive manual tasks.
Data Source
AI summary
Processing data in a computer-aided design (CAD) system includes determining that a feature of a three-dimensional model has a condition that requires correction. The condition is automatically corrected by performing an action. The action may be an action that reorders a sequence of features in the three-dimensional model, an action that changes at least one parameter of the feature, an action that deletes a feature reference, or an action that changes a feature reference. Furthermore, the action may have one or more constraints that bound the action to a set of features that are directly and indirectly related to the feature on which the action operates.