A procedure is proposed for decoupling fabric in alignment during processing from all possible deflection disturbances. The dynamics of lateral deflection for a two-span system is mathematically described and refined to compensate for modeling errors through a parameter estimation algorithm. A disturbance decoupling problem with stability (DOPS) is adopted to eliminate the effect of deflection disturbances on a fabric that is to be fed into a process machine in a desired alignment, while the resulting closed-loop system is stable. The simulation results demonstrate that DDPS enables the fabric to stay in alignment by both shifting and swiveling a guiding roller.
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References
1.
Ailon, A., Disturbance Decoupling with Stability and Impulse-Free Response in Singular Systems, Systems Control Lett.19, 401-411 (1992).
2.
Dorea, C.E.T. , and Milani, B.E.A., A Computational Method for Optimal L-Q Regulation with Simultaneous Disturbance Decoupling, in "Proc. American Control Con' ference," June 1993, pp. 2668-2672.
3.
Ogata, K., "Modem Control Engineering," Prentice-Hall, NJ, 1990.
4.
Shelton, J.J. , and Reid, K.N., Lateral Dynamics of an Idealized Moving Web, ASME J. Dynamic Syst. Meas. Control93, 187-192 (1971).
5.
Shelton, J.J. , and Reid, K.N., Lateral Dynamics of a Real Moving Web, ASME J. Dynamic Syst. Meas. Control93, 180-186 (1971).
6.
Young, G.E., Shelton, J.J., and Fang, B., Interaction of Web Spans, Part I: Statics, ASME J. Dynamic Syst. Meas. Control111, 490-496 (1989).
7.
Young, G.E., Shelton, J.J., and Fang, B., Interaction of Web Spans, Part II: Dynamics, ASME J. Dynamic Syst . Meas. Control111, 497-504 (1989).
8.
Young, G.E., Shelton, J.J., and Kardamilas, C., Modeling and Control of Multiple Web Spans Using State Estimation , ASME J. Dynamic Syst. Meas. Control111, 505-510 (1989).
9.
Young, G.E., and Reid, K.N., Lateral andLongitudinal Dynamic Behavior and Control of Moving Webs, ASME J. Dynamic Syst. Meas. Control115, 309-317 (1993).
