Mixed ${\cal H}_{2}/{\cal H}_{\infty}$ Observer-Based LPV Control of a Hydraulic Engine Cam Phasing Actuator

Andrew White, Zhen Ren, Guoming Zhu, Jongeun Choi
2013 IEEE Transactions on Control Systems Technology  
In this paper, a family of linear models previously obtained from a series of closed-loop system identification tests for a variable valve timing cam phaser system is used to design a dynamic gain-scheduling controller. Using engine speed and oil pressure as the scheduling parameters, the family of linear models was translated into a linear parameter varying (LPV) system. An observer-based gain-scheduling controller for the LPV system is then designed based on the linear matrix inequality
more » ... ix inequality technique. A discussion on weighting function selection for mixed controller synthesis is presented, with an emphasis placed on examining various frequency responses of the system. Test bench results show the effectiveness of the proposed scheme. Index Terms-Engine and powertrain control, gain-scheduling control, hydraulic control system, linear parameter varying (LPV) control, robust control.
doi:10.1109/tcst.2011.2177464 fatcat:iiwc6unhdjbpncq363l3wr74ii