Control unit having a disturbance predictor, a system controlled

Details Control unit having a disturbance predictor, a system controlled Control unit having a disturbance predictor, a system controlled

1997-04-10

1999-11-30

Dolinar, Andrew M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

25112904, 318561, 318601, 364165, F02D 1110, G05B 1304

Patent

active

059923830

ABSTRACT:
A control unit (75) for controlling a first state variable of a system, for example an angle of rotation .phi. of a throttle valve (7) in a throttle device for use in an internal-combustion engine, the system being influenced by a disturbance variable during operation, for example an oscillating loading torque caused by air-flow fluctuations in the throttle device. The control unit includes a disturbance observer (125) for calculating a value of the disturbance variable at a first point in time on the basis of a mathematical model of the system, and a disturbance predictor (128) for predicting a value of the disturbance variable at a second point in time which follows the first point in time by a predetermined time interval. In this manner, a phase shift between the disturbance variable actually influencing the system and the compensation provided by the system for the disturbance variable is prevented at high frequencies of the disturbance variable.

REFERENCES:
patent: 5408406 (1995-04-01), Mathur et al.
patent: 5454358 (1995-10-01), Hattori et al.
patent: 5498943 (1996-03-01), Kimoto et al.
"Accurate Motion Controller Design Based on an Extended Pole Placement Method and a Disturbance Observer", Hendrik Van Brussel et al, Annals of the CIRP, vol. 43, No. 1, 1994.

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