| LIU Lu-yang1 ，GUO Ying-qing 1 ，YANG Wen-hao 1 ，LIU Yan-yan 2.Multivariable Control of Variable Cycle Engine Based on H ∞ -Infinity Loop Shaping[J].航空发动机,2023,49(1):139-144 |
| Multivariable Control of Variable Cycle Engine Based on H ∞ -Infinity Loop Shaping |
| DOI： |
| Key Words:variable cycle engine multivariable control H ∞ -infinity loop shaping method relative gain matrix |
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| Abstract:In order to further improve the performance of the variable cycle engine, the relative gain matrix (RGA) was used to analyze
the internal coupling of the 3-input 3-output variable cycle engine model. The multivariable controller was designed by using the two-de?
grees-of-freedom H ∞ -infinity loop shaping method based on the objective function and compared with the traditional single variable PI
method. The simulation results show that the multivariable control system has good disturbance rejection ability and tracking performance,
and can successfully realize modal transition. Compared with the single variable method, under the same crossover frequency and phase
margin constraints, the overshoot of the n 1 loop step response is reduced by 95.3% and the settling time is shortened by 51.5%. The maxi?
mum offset of π e loop is reduced by 89.69% and the settling time is shortened by 27.4%. It shows that the multivariable method can effec?
tively control the variable cycle engine and performs better in the tracking control process, which can significantly improve the performance
of the variable cycle engine. |
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