Precise Pressure Control of Constant Pressure Chamber Based on Control Allocation

被引：0
|
作者：
Liu J.-S. [1 ,2 ]
Wang X. [1 ,2 ]
Zhu M.-Y. [3 ]
Yang S.-B. [1 ,2 ]
Pei X.-T. [1 ,2 ,4 ]
Miao K.-Q. [1 ,2 ]
Zhang S. [4 ]
Dan Z.-H. [4 ]
机构：
[1] School of Energy and Power Engineering, Beihang University, Beijing
[2] Collaborative Innovation Center for Advanced Aero-Engine, Beijing
[3] Beihang Hangzhou Innovation Institute Yuhang, Hangzhou
[4] Science and Technology on Altitude Simulation Laboratory, AECC Sichuan Gas Turbine Establishment, Mianyang
来源：
Tuijin Jishu/Journal of Propulsion Technology | 2022年 / 43卷 / 10期
关键词：
Constant pressure chamber system; Control allocation; Double-valve control; LMI; Model uncertainty;
D O I：
10.13675/j.cnki.tjjs.210524
中图分类号：
学科分类号：
摘要：
Aiming at precise pressure control of the constant pressure chamber adjusted by two valves when the air flow changes in a wide range，a precise pressure control method of constant pressure chamber based on control allocation is proposed. First，a control allocation algorithm of two valves for virtual discharge flow is estab⁃ lished. The algorithm includes the following steps：establish an optimization problem that meets the requirements of the virtual discharge flow and minimizes the energy consumption of the regulating valves，solve the optimiza⁃ tion problem by Linear Matrix Inequality（LMI）to obtain the actual opening area value of the double valves，con⁃ sider the dynamics of the regulating valves and calculate its control signal command values. Second，the virtual discharge flow is used as the control input of the constant pressure chamber to establish a closed-loop negative feedback loop. Based on this，a PI controller that meets the requirements of servo performance and anti-interfer⁃ ence performance is designed. Then，introduce the established control allocation algorithm to build a complete pressure control system based on control allocation. The simulation results show that the control performance of the proposed method is obviously better than the traditional PI control method of single valve. The dynamic rela⁃ tive error of the pressure is less than 0.07%. When the maximum change rate of interference flow is 77kg/s2，the maximum deviation of pressure is less than 500Pa. In addition，the uncertainties of the dynamic time constant and flow coefficient of the regulating valves are introduced，and the simulation results further verify the robust⁃ ness of the controller. © 2022 Journal of Propulsion Technology. All rights reserved.
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