Title:
A CONTROL UNIT HAVING A DISTURBANCE PREDICTOR, A SYSTEM CONTROLLED BY SUCH A CONTROL UNIT, AN ELECTRICAL ACTUATOR CONTROLLED BY SUCH A CONTROL UNIT, AND A THROTTLE DEVICE PROVIDED WITH SUCH AN ACTUATOR
Document Type and Number:
WIPO Patent Application WO1997045777
Kind Code:
A3
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.
Inventors:
SCHOLTEN LUTZ
TRACHT RUDOLF
TRACHT RUDOLF
Application Number:
PCT/IB1997/000472
Publication Date:
February 05, 1998
Filing Date:
April 30, 1997
Export Citation:
Assignee:
PHILIPS ELECTRONICS NV (NL)
PHILIPS NORDEN AB (NL)
PHILIPS NORDEN AB (NL)
International Classes:
F02D11/10; F02D45/00; F02D35/00; F02D41/14; G05B11/36; G05B13/02; H02P23/16; (IPC1-7): G05B13/02
Domestic Patent References:
| WO1990004820A1 | 1990-05-03 | |||
| WO1995034903A1 | 1995-12-21 |
Foreign References:
| US5195038A | 1993-03-16 | |||
| US5428559A | 1995-06-27 |
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