CNC Machine Movement Guidance Optimization
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Solution Overview
Problem
Existing methods for guiding the movement of machine elements in numerically controlled machines do not fully utilize the maximum possible path speed, acceleration, and jolt, leading to suboptimal movement profiles that inadequately utilize these constraints.
Innovation Solution
The method involves breaking down the movement path into sections, determining local minimum speed values, and using the maximum possible jolt and acceleration to define left and right path speed segments, connecting adjacent segments while ensuring zero acceleration at connecting points to maintain continuous differentiability and maximize path speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional movement guidance methods are used, then the machine element follows a predefined movement path, but the maximum possible path speed, acceleration, and jolt are not fully utilized
Solution Approach 1:
The patent applies dynamics by transitioning from static, predefined movement profiles to dynamic optimization. The movement guidance is continuously optimized by integrating maximum jolt and acceleration constraints directly into the path speed calculation, allowing the system to adaptively utilize the full dynamic capabilities of the machine axles while maintaining constraint compliance.
Solution Approach 2:
The patent changes the fundamental parameters of movement guidance by shifting from predefined speed profiles to constraint-based optimization. By using maximum possible jolt and acceleration as defining parameters rather than fixed speed curves, the system achieves higher path speeds while ensuring all machine constraints are satisfied.
2Measurement precision
If the movement path is broken into many small sections for precision, then the movement guidance becomes more accurate, but the computational complexity and processing time increase
Solution Approach 1:
The patent applies segmentation by dividing the movement path into sections defined by local minimum speed values rather than arbitrary small intervals. This intelligent segmentation approach maintains the necessary precision for accurate movement guidance while significantly reducing the number of calculation sections compared to traditional fine-grained discretization methods.
Solution Approach 2:
The patent uses partial action by focusing computational efforts only on critical sections of the movement path - specifically around local minimum speed values where constraint transitions occur. Rather than calculating every point along the path, the method determines path speed segments only where necessary, reducing overall computational complexity while maintaining accuracy.
3Productivity
If the path speed is maximized throughout the entire movement, then the productivity increases, but the acceleration constraints may be violated at connecting points
Solution Approach 1:
The patent applies preliminary action by proactively ensuring zero acceleration at connecting points between path speed segments. By预先 (in advance) setting acceleration to zero at these transition points, the method prevents future constraint violations and maintains smooth, continuous acceleration profiles throughout the entire movement, enabling sustained high path speeds without instability.
Data Source
AI summary
The invention relates to a method and a device for guiding the movement of a moving machine element on a numerically controlled machine, whereby maximum possible track speed, maximum possible track acceleration, and maximum possible track jerk are defined by means of given restrictions on track axes. The local minima for the maximum possible track speed are determined, whereby for each local minimum a corresponding left-sided and right-sided track speed segment is determined, whereby, for track values for the displacement track to the left and right of a given minimum, the resulting track speed is determined by using the maximum possible track jerk and the maximum possible track acceleration until the track speed exceeds the maximum possible track speed to the left and right of the minimum, a track jerk curve for the movement guidance is hence determined. According to the invention, a simple method and a simple device for movement guidance of a moving machine element on a numerically controlled machine are achieved, with as good as possible a usage of the restrictions on machine axes of the machine.