Robust engine speed controller design based on quantitative feedback theory

A robust controller for engine speed regulation of automated manual transmission(AMT) hybrid vehicle is introduced in this paper. Based on the shift control strategy of no clutch motion and power compensated by motor, the engine speed needs to be precisely controlled. A high realistic plant model is established and verified in AMESim environment. Then the plant parameters are identified in stepwise speeds to quantify the uncertainty of system. Based on Quantitative Feedback Theory, a compensator is designed with linearized models and parameter uncertainty to guarantee the control requirements on Nichols chart and a prefilter is designed to guarantee the tracking performance in Bode diagram. Finally the designed controller is evaluated through simulations on AMESim, which shows that the proposed robust controller satisfies the control requirements.