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.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
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)
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
servo system
mechanical resonance
resonance suppression
notch filter
digital filter
two-second filter
