Browse Publications Technical Papers 2001-01-3316
2001-10-01

Application of Loop Shaping H-infinity Control to Diesel Engine Anti-Oscillation Strategy 2001-01-3316

The control of fuel delivery to minimize drivetrain oscillations is a major benefit to vehicle refinement and driveability. This paper describes the application of robust H-infinity loop-shaping control to the speed-fuel control loop. A one-degree-of-freedom controller structure (feedback only) is examined and applied to a small passenger car. Using careful implementation, the control algorithm is of low order and efficient requiring only limited microprocessor resources.
The robust controller gives excellent performance when operated synchronously to engine rotation, where the dynamics become speed-dependent. Alternatively it can be operated satisfactorily at a fixed sample rate, asynchronous to engine rotation. The design is found to be eminently suitable for production.

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