Plant controller for frequency-shaping response-designating...

Details Plant controller for frequency-shaping response-designating... Plant controller for frequency-shaping response-designating...

2005-09-27

2005-09-27

Argenbright, Tony M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C701S111000, C701S113000, C123S339200, C123S352000, C700S055000, C060S284000, C060S285000

Reexamination Certificate

active

06950741

ABSTRACT:
A plant controller controls a plant modeled in a discrete-time system. The controller uses a frequency-shaping response-designating control algorithm having a filtering function to cause a difference between output of the plant and a target value to converge. Thus, the plant is robustly controlled without causing undesired frequency components. When the plant is an engine, the engine is modeled using a ignition timing corrective quantity as input and a rotational speed as output. The controller performs the frequency-shaping response-designating control algorithm to determine the ignition timing corrective quantity. The frequency-shaping response-designating control may be frequency-shaping sliding-mode control. In one embodiment, the control input into the plant may includes a corrective term for stabilizing an internal variable of the filter, a corrective term for stabilizing the difference between the output of the plant and the target value and a corrective term that varies depending on a switching function.

REFERENCES:
patent: 3599108 (1971-08-01), Gardner
patent: 5568142 (1996-10-01), Velazquez et al.
patent: 5662084 (1997-09-01), Deguchi et al.
patent: 5857443 (1999-01-01), Kono et al.
patent: 6032166 (2000-02-01), Signell et al.
patent: 6192311 (2001-02-01), Yasui et al.
patent: 2000-110657 (2000-04-01), None
Sakai et al. “Application of LLQ-Based Frequency-Shaping Control to a Magnetic Levitation System”, IEEE (1998) (pp. 593-597).

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