| A Generalized Acceleration and Deceleration Approach for Continuous Small Line Blocks with Look-ahead |
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| 作者姓名： | LUO Fuyuan~ ZHOU Yunfei~ YIN Juan~ |
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| 作者单位： | 1.National Technical Research Center-Numerical Control System，School of Mechanical Science and Engineering，Huazhang University of Science and Technology，Wuhan 430074，China，2.School of Machinery and Automobile Engineering，Hefei University of Technology，Hefei 234009，China |
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| 摘 要： | Generally complex 3D contours are divided into a lot of continuous small line blocks by CAD/CAM software. When these small line blocks are used in conventional way,machine tool has to stop at the end of one move before continuing on to the next to meet accuracy requirement,which results in inefficiency.Look-ahead is an intelligent function that aims at adjusting the feed rate automatically to achieve maximum productivity while maintaining accuracy.By now most researchers just utilize the simplest linear acceleration(ACC)and deceleration(DEC)to deal with look-ahead intelligence.A generalized ACC/DEC ap- proach and corresponding optimal look-ahead algorithm based on dynamic back tracking along a doubly linked list are proposed.An improved rounding strategy for reducing interpolation errors is also presented.By using the proposed techniques,arbitrary velocity profiles that offer look-ahead feature and have the desired ACC/DEC characteristics for movement of a lot of continuous line blocks can be generated efficiently.Both simulations and experiments showed the productivity was dramatically increased without sacri- fice of accuracy.
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A Generalized Acceleration and Deceleration Approach for Continuous Small Line Blocks with Look-ahead |
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| LUO Fuyuan ZHOU Yunfei YIN Juan.A Generalized Acceleration and Deceleration Approach for Continuous Small Line Blocks with Look-ahead[J].Journal of Wuhan University of Technology,2006(Z3). |
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| Authors: | LUO Fuyuan ZHOU Yunfei YIN Juan |
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| Affiliation: | LUO Fuyuan~1 ZHOU Yunfei~1 YIN Juan~2 |
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| Abstract: | Generally complex 3D contours are divided into a lot of continuous small line blocks by CAD/CAM software. When these small line blocks are used in conventional way,machine tool has to stop at the end of one move before continuing on to the next to meet accuracy requirement,which results in inefficiency.Look-ahead is an intelligent function that aims at adjusting the feed rate automatically to achieve maximum productivity while maintaining accuracy.By now most researchers just utilize the simplest linear acceleration(ACC)and deceleration(DEC)to deal with look-ahead intelligence.A generalized ACC/DEC ap- proach and corresponding optimal look-ahead algorithm based on dynamic back tracking along a doubly linked list are proposed.An improved rounding strategy for reducing interpolation errors is also presented.By using the proposed techniques,arbitrary velocity profiles that offer look-ahead feature and have the desired ACC/DEC characteristics for movement of a lot of continuous line blocks can be generated efficiently.Both simulations and experiments showed the productivity was dramatically increased without sacri- fice of accuracy. |
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| Keywords: | acceleration and deceleration numerical control back tracking look-ahead interpolation |
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