Control system with pilot controller, especially for a roll stan

Details Control system with pilot controller, especially for a roll stan Control system with pilot controller, especially for a roll stan

1993-02-24

1994-10-04

Gordon, Paul

Boots, shoes, and leggings

364150, 364472, G05B 1304, G06F 1546

Patent

active

053532171

ABSTRACT:
In a control system, especially a hydraulic screw-down control system for a roll stand, the controller output is acted upon by a pilot control value (v.sub.1.sup.*). At the same time, a reference value (x.sub.M ') is delivered to the controller via a subtractor as a setpoint value. The reference value (x.sub.m ') is determined in a model control loop based on the pilot controller. Parasitic response characteristics of the overall system are largely accounted for in the model control loop, so that on a time-averaged basis the controller is not activated.

REFERENCES:
patent: 4646226 (1987-02-01), Moon
patent: 4674029 (1987-06-01), Maudal
patent: 5036265 (1991-07-01), Weihrich et al.
Proceedings of the 1990 American Control Conference, vol. 2, May 1990, P. M. Sain; M. K. Sain: On Coordinated Feedforward Exitation of Nonlinear Servomechanism, pp. 1695-1700.

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