| Citation: | MIAO Keqiang, WANG Xi, ZHU Meiyinet al. Optimal design of transient main closed-loop control law based on LMI[J]. Journal of Beijing University of Aeronautics and Astronautics, 2022, 48(5): 841-854. doi: 10.13700/j.bh.1001-5965.2020.0661(in Chinese)
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In order to solve the problem that it is difficult to design transient multivariable control law for turbofan engines, a method of extracting linear model at quasi steady working point of transient acceleration and deceleration line based on power import and extraction is proposed. Based on this, a transient main closed-loop control optimal design method is proposed. It is extended from the steady multivariable control law's linear matrix inequality (LMI) design method to the design of transient main closed-loop control for turbofan engines because the gain-schedule can be used as nonlinear dynamic control method. Minimum matrix trace optimization closed-loop pole is configured to ensure the feasibility of the method. As demanded by two different transient main closed-loop control schedules, two different minimum matrix trace optimization transient multivariable main closed-loop control laws were designed respectively. Dual channels transient performance ground simulations based on a nonlinear turbofan engine model and containing the dynamic state between idle state and maximum power setting state were done. The results show that settling time of transient control dual channels
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