ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Smooth kinematic profiles are very important for high speed curve machining. Duringparametric interpolation, simple adaptive feedrate with confined contour error may causeacceleration and jerk to fluctuate acutely. To avoid the undesirable influence, an interpolationalgorithm for parametric curves with smooth kinematic profiles is presented. The interpolatorconsists of three parts, look-ahead module, feedrate planning module and interpolation module. Inlook-ahead module, a pre-interpolator is designed to produce the required feedrate profile consideringchord error. By feedrate planning, a smooth feedrate profile with confined acceleration and jerk isschemed based on bell-shape ACC/DEC profile by feedrate profile matching and feedrate profilesynthesis. Then the parametric curve can be interpolated with the planned feedrate in interpolationmodule. Simulation results have been also provided to illustrate that the proposed interpolator cangenerate smooth kinematic profiles required for the high tracking accuracy at high speed withconfined chord error, acceleration and jerk, and can be used for high speed and precision curvemachining
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.315-316.169.pdf
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