基于数字滤波器的伺服系统谐振抑制方法  

Resonance suppression method based on digital filter for servo system

作　　者：王建敏[1,2] 吴云洁[1,2] 刘佑民[3] 张武龙[4] 

机构地区：[1]北京航空航天大学自动化科学与电气工程学院,北京100191 [2]北京航空航天大学飞行器控制一体化技术重点实验室,北京100191 [3]北京航天发射技术研究所,北京100076 [4]北京仿真中心导弹控制系统仿真国防科技重点实验室,北京100854

出　　处：《北京航空航天大学学报》2015年第3期485-491,共7页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家自然科学基金资助项目(91216304)

摘　　要：针对飞行仿真伺服系统(转台)中存在的机械谐振问题,在分析传统陷波器及二阶低通滤波器谐振抑制原理的基础上,提出了一种双二次谐振抑制数字滤波器.该双二次型数字滤波器结合了传统陷波器和二阶低通滤波器的特点,能够将谐振点和反谐振点同时抑制.通过理论分析与仿真验证相结合的方式,阐述了该双二次型数字滤波器能够同时抑制正反谐振点的原理,并将该滤波器加入到了转台系统中进行实验.实验结果表明,所设计的滤波器在提高跟踪精度的同时有效拓宽了系统的带宽.According to mechanical resonance problem in flight simulation servo system （turntable sys- tem） , the principles of resonance suppression about traditional notch filter and second-order low-pass filter were analyzed. Afterwards the two-second resonance suppression digital filter was proposed. The two-second digital filter combines the characteristics of traditional notch filter and second-order low-pass filter, and it can suppress the resonance point and the anti-resonance point at the same time. Through theoretical analysis and simulation combination, the principle of the two-second digital filter restraining the resonance point and the an- ti-resonance point simultaneously was explained. The experiments were also conducted, in which above all fil- ters were joined into the turntable system respectively. Experimental results show that, the proposed filter en- sures high tracking precision meanwhile effectively widens the bandwidth of the servo system.

关 键 词：伺服系统 机械谐振 谐振抑制 陷波器 数字滤波器 双二次滤波器 

分 类 号：V416.8[航空宇航科学与技术—航空宇航推进理论与工程]