双重强跟踪滤波励磁及速度非线性鲁棒控制

针对传统移动电站存在励磁、调速控制相互独立、缺乏联系的不足,研究和建立了励磁及机电复合调速非线性模型,提出了基于状态参数双重强跟踪滤波估计的非线性鲁棒综合控制策略.采用双重强跟踪滤波的方法,实现了模型中关键状态参量的间接获取,依据多输入多输出系统的精确反馈线性化、非线性鲁棒控制理论,对励磁、机电复合调速综合控制律进行了推导,并进行了仿真验证.仿真结果表明:负载突变时,强跟踪滤波能够快速跟踪和估计状态参数;在外部干扰存在情况下,通过求解线性矩阵不等式,本文得到的控制律在保证励磁、转速控制系统稳定的同时,能够实现L2增益干扰抑制.

Nonlinear robust excitation and speed control based on the double strong tracking filter

To deal with the lack of associated control between the excitation system and the speed system, we build the nonlinear mathematical model for the moving power station and propose the excitation and speed synthetic nonlinear robust control. The key state parameters of the mathematical model are estimated by the double strong tracking filter (DSTF). According to the exact feedback linearization and the nonlinear robust control method of the multi-input and multi-output system, the synthetic control law of the excitation and electro-mechanical speed control system is obtained by solving the linear matrix inequality (LMI), and is testified by simulation. Simulation results show that the DSTF can track and estimate the values of the state parameters rapidly when the load increased suddenly, and the nonlinear robust synthetic control not only can stabilize the excitation system and the speed control system, but also can realize the L2 disturbance attenuation.