Electricity: motive power systems – Positional servo systems – 'reset' systems
Patent
1992-04-24
1993-10-05
Ip, Paul
Electricity: motive power systems
Positional servo systems
'reset' systems
318609, 318561, 318608, G05B 1100, H02P 700
Patent
active
052508870
ABSTRACT:
A feedback controller inputs a reference signal instructing a controlled variable output from an object operated in accordance with a control signal and a feedback signal, to calculate the control signal such that the feedback signal is equal to the reference signal, and to supply the calculated control signal to the object. The controller has a transfer function Gf, and functions to generate the following response waveform f (t) due to a disturbance. That is, a response waveform of the controlled variable at the time when the disturbance is added to the controlled object is set to f (t), a response waveform of the feedback signal in an opened loop state, such that feedback of said controlled variable is turned off, is set to p (t), a relative degree of the disturbance is set to "d", and a relative degree of the controlled object is set to "g". At the time in which the disturbance is added to the controlled object, each differential value of the response waveform f (t) up to at least a degree (2g+d-2) is equal to each differential value corresponding to the response waveform p (t), and at finite time, each differential value of the response waveform f (t) up to at least a degree (2g+d-2) becomes zero and after the finite time, the differential values relative to all degrees become zero.
REFERENCES:
patent: 4432439 (1984-02-01), Caputo et al.
patent: 4675584 (1987-06-01), Karosawa
patent: 4675804 (1987-06-01), Wiemer
patent: 4874999 (1989-10-01), Kuwabara et al.
patent: 4894599 (1990-01-01), Ottesen et al.
patent: 4982145 (1991-01-01), Peterson
patent: 5105138 (1992-04-01), Hiroi
patent: 5111124 (1992-05-01), Kurosawa
O. J. M. Smith: "Feedback Control Systems" No. 107, 1958, McGraw-Hill, New York, pp. 341-345.
Ip Paul
Kabushiki Kaisha Toshiba
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