Evaluation of compression algorithms for motion command generation

This paper focuses on a direct command generation technique for Computer Numerical Control (CNC) machine systems. In this paradigm, higher-order differences of a given trajectory (i.e, position) are computed and the resulting data are compacted via data compression techniques. As a part of the command generation scheme, the paper also introduces a new data compression technique titled ΔY10. Apart from this new method, the performances of the proposed generator employing different compression algorithms (such as Huffman Coding, Arithmetic Coding, LZW, and ΔY10) are also assessed through a test case. The paper shows that the ΔY10 technique, which is suitable for real-time hardware implementation, exhibits much better performance than its counterparts in terms of data compaction achieved.