A new methodology is developed for optimal infeed control of cylindrical plunge grinding cycles. Unlike conventional cycles having a few sequential stages with discrete infeed rates, the new methodology allows for continuous variation of the infeed rate to further reduce the cycle time. Distinctive characteristics of optimal grinding cycles with variable infeed rates were investigated by applying dynamic programming to a simulation of the grinding cycle. The simulated optimal cycles were found to consist of distinct segments with predominant constraints. This provided the basis for an optimal control policy whereby the infeed rate is determined according to the active constraint at each segment of the cycle. Accordingly, the controller is designed to identify the state of the cycle at each sampling instant from on-line measurements of power and size, and to then compute the infeed rate according to the optimal policy associated with that state. The optimization policy is described in this paper, and the controller design and its implementation are presented in the following paper .
Continuous Optimal Infeed Control for Cylindrical Plunge Grinding, Part 1: Methodology
Contributed by the Manufacturing Engineering Division for publication in the JOURNAL OF MANUFACTURING SCIENCE AND ENGINEERING. Manuscript received July 2003; Revised November 2003. Associate Editor: T. R. Karfess.
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Dong, S., Danai, K., Malkin, S., and Deshmukh, A. (July 8, 2004). "Continuous Optimal Infeed Control for Cylindrical Plunge Grinding, Part 1: Methodology ." ASME. J. Manuf. Sci. Eng. May 2004; 126(2): 327–333. https://doi.org/10.1115/1.1751423
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