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In order to reveal the relationship between scheduling algorithms and manufacturing accuracy, a model-based method of analyzing mismachining tolerance is presented. First, for embedded implementation, the parameters relating to sampling jitter and input-output jitter are analyzed in depth. Then, based on the error evaluation from this research, a software-based CNC simulation model is established...
For computer-controlled systems (CCSs), actual sampling intervals inevitably deviate from its nominal sampling period, called sampling interval jitter (SIJ), which may degrade control performance and even unstabilize control systems. So it should be accounted for at design time. The model of CCSs with SIJ is presented and its effects on CCSs is illustrated by simulation. The model developed costs...
A fuzzy feedback scheduling (FFS) scheme based on output jitter for resource-constrained embedded control systems is proposed in order to reduce error caused by the uncertainty of timing parameters. Based on an in-depth analysis of the parameters related to sampling jitter and input-output jitter, the scheduling architecture is described. A simplified software-based computer numerical control (CNC)...
As a typical complex embedded computer control system, computer numerical control(CNC) system development is confronted with a great challenge because of its specific requirements as well as some recent development trends such as ever more complex products while at lower prices and shorter develop cycle. In this paper, a model driven methodology for CNC system design and development is presented,...
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