摘要
针对航空发动机线性变参数(LPV)模型部件性能参数估计问题,给出了一种新的鲁棒LPV滤波器设计方法。基于参数依赖的二次Lyapunov函数及仿射二次稳定性概念得到了稳定且满足H∞性能指标滤波器存在的充分条件,利用函数多凸性概念将其转化为线性矩阵不等式(LMI)约束下的常规凸优化问题,得到了滤波器的解。针对某型退化涡扇发动机部件性能参数估计的仿真结果表明,该滤波器的精度和鲁棒性满足设计要求。
According to the characters of the aeroengine parameter estimation, a new robust linear parameter varying (LPV) filter for LPV model of aeroengine is proposed. Based on the notion of affine quadratic stability and parameter-dependent quadratic Lyapunov function, the sufficient condition which guarantees the filter stability and H∞ performance target is given, and the design method is converted into a normal convex optimal problem under the constraint of linear matrix inequalities (LMI) by using the conception of multi-convexity. The accuracy and robustness of the filter design method are validated by simulation on the parameter estimation for a deteriorated turbofan engine.
出处
《推进技术》
EI
CAS
CSCD
北大核心
2009年第2期209-212,245,共5页
Journal of Propulsion Technology
基金
国家自然科学基金项目(50675178)
关键词
航空发动机
参数估计
线性变参数系统
鲁棒滤波器
Aeroengines
Parameter estimation
Linear parameter varying system
Robust filter
作者简介
韩小宝(1980-),男,博士,研究领域为航空发动机线性变参数系统滤波、控制理论。E—mail:ranger_1980@mail.nwpu.edu.cn