Quaternion-based five-coordinate spline interpolation control method

A control method and five-coordinate technology, applied in the direction of digital control, electrical program control, etc., can solve the problems of discontinuity, destruction of track accuracy, transmission error, etc.

Inactive Publication Date: 2010-06-16
HARBIN INST OF TECH
View PDF0 Cites 24 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the transmission error between the CAD / CAM system and the CNC and the discontinuity between the segments destroy the accuracy of the track, and the moving speed becomes uneven and discontinuous, a five-coordinate numerical control system is proposed interpolation control method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Quaternion-based five-coordinate spline interpolation control method
  • Quaternion-based five-coordinate spline interpolation control method
  • Quaternion-based five-coordinate spline interpolation control method

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0017] Specific implementation mode one: the steps of this implementation mode are as follows:

[0018] Step 1, read the track data on the curve of the part design drawing by the CAM software, and establish the CAM tool path;

[0019] Step 2. Convert the CAM tool path to the five-coordinate spline interpolation NC code format; the five-coordinate spline interpolation NC code format is divided into three forms: linear translation five-coordinate spline interpolation NC code format, linear rotation five Coordinate spline interpolation NC code format and general five-coordinate spline interpolation NC code format;

[0020] Step 3. Convert the three five-coordinate spline interpolation NC code formats into joint motion programs through the inverse dynamics transformation formula. The formula is:

[0021]

[0022]

[0023] X = ( X W ...

specific Embodiment approach 2

[0025] Embodiment 2: This embodiment differs from Embodiment 1 in that the CAM tool path is divided into a translation path, a pure rotation path, and a compound path of translation and rotation. Other compositions and connection methods are the same as those in Embodiment 1.

specific Embodiment approach 3

[0026] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the translation path and the pure rotation path, and the compound path of translation and rotation are respectively composed of translation cubic uniform B-spline, rotation triple uniform quaternary B-spline and double cubic uniform B-splines to describe. Other compositions and connection methods are the same as those in the second embodiment.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a quaternion-based five-coordinate spline interpolation control method, and relates to a numerical control system. In order to solve the problems that the transfer error between a CAD/CAM system and CNC, the discontinuity between segments destroys the track precision, and the movement speed becomes nonuniform and discontinuous, the quaternion-based five-coordinate spline interpolation control method comprises the following implementing processes: 1, CAM software reads track data on a curve of a parts design drawing, and establishes a CAM tool path; 2, the CAM tool path is converted into a numerical control code format of the five-coordinate spline interpolation, wherein the numerical control code format of the five-coordinate spline interpolation is divided into three formats: a linear-translation numerical control code format of the five-coordinate spline interpolation, a linear-rotation numerical control code format of the five-coordinate spline interpolation, and a universal numerical control code format of the five-coordinate spline interpolation; 3, converting the three numerical control code formats of the five-coordinate spline interpolation into a joint movement program through an inverse dynamics transformation formula; and 4, finishing processing parts. The quaternion-based five-coordinate spline interpolation control method is widely applied to the field of numerical control systems.

Description

technical field [0001] The invention relates to a numerical control system, in particular to an interpolation control method of a five-coordinate numerical control system. Background technique [0002] In contemporary CAD / CAM systems, the contours of parts such as impellers, aircraft molds, and automotive molds are usually represented in the form of parametric curves. Because most computer numerical control (Computer Numerical Control, CNC) systems only provide linear and circular interpolators, the CAD / CAM system has to discretize the curve into a large number of small straight line segments and then send them to the computer numerical control (CNC) system . However, this processing method has some disadvantages: (1) it will cause transmission errors between the CAD / CAM system and the CNC; (2) the discontinuity between segments destroys the accuracy of the track; (3) the moving speed becomes uneven ,Discontinuous. [0003] The problems mentioned above can be solved by us...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/4103
Inventor 王永章富宏亚韩振宇付云忠路华梁全
Owner HARBIN INST OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap