The dissertation presents the combined theoretical , numerical and experimental studies on the experimental modeling of the actuator , the design of test rig and control system , the modeling of two - dimensional airfoil aeroelastic system , the control design of active flutter suppression , and the effect of group delay in the digital filter on the stability of aeroelastic closed - loop system 本文通过理论分析、数值仿真与风洞实验相结合的方法,研究了超声电机作动器建模、翼段颤振实验装置和控制系统设计、二维翼段气动弹性系统建模、颤振抑制控制律设计以及数字滤波器群时延对颤振抑制闭环系统稳定性影响等问题。
This dissertation presents several novel control techniques for the torque ripple minimization of pm bldcm . according to the different back - emf waveforms of bldcm , this dissertation gives a detailed analysis to the torque ripple due to trapezoidal emf , pseudo - sinusoidal emf , and general shape emf respectively , and from each one proposes a kind of control technique for torque ripple minimization 根据永磁无刷直流电动机反电势波形的不同,对方波型无刷直流电动机的换相转矩脉动,准正弦波( pseudo - sinusoidalemf )反电动势无刷直流电动机以及任意波形反电动势无刷直流电动机的电磁转矩脉动,进行了详细的分析,分别提出三种不同的控制策略,进行转矩脉动抑制控制。