Boots – shoes – and leggings
Patent
1985-02-07
1987-10-06
Smith, Jerry
Boots, shoes, and leggings
364149, 364157, 364158, G05B 1302, G06F 1546
Patent
active
046987452
ABSTRACT:
A process control apparatus according to the present invention comprises a feed back control system for outputting a feedback control signal which is computed by comparing and adjusting a set value and a process variable, and a feedforward control system for outputting a disturbance compensation signal by detecting and compensating for the disturbance based on a feedforward control model. The gain of the feedback control signal is corrected in response to the magnitude of the disturbance variations by a gain scheduling unit, and the gain of the feedforward control model is controlled by supplying a correction signal which compares and equalizes, at a feedforward control model gain adaptive unit, the disturbance compensation signal and the manipulated variable obtained by adding the disturbance compensation signal and the feedback signal that is gain-corrected by the gain scheduling unit. The feedforward control model comprises a gain memory for memorizing storing the FF model gain correction signal from the feedforward control model gain adaptive unit and an operational means for receiving a correction signal from the gain memory and a disturbance signal to compute and output a disturbance compensation signal. The process control apparatus further includes a FF model gain adaptive mechanism for controlling the supply to the gain memory of the FF model gain correction signal by confirming that the process is in a steady state, and for controlling as well the additive synthesis of the disturbance compensation signal to the feedback control signal when the difference between the disturbance compensation signal and the manipulated quantity exceeds a prescribed value.
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Hiroi Kazuo
Ito Kojiro
Kabushiki Kaisha Toshiba
Lastova John R.
Smith Jerry
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