摘要
为了提升带时滞多输入多输出(multi-input multi-output,MIMO)系统的抗干扰能力,提出了1种基于鲁棒性能指标的改进干扰观测器(disturbance observer,DOB)设计方法,将1种新的分数阶低通滤波器引入到干扰观测器中,通过分析观测器中参数对系统抗干扰能力的影响,采用最大灵敏度和最大互补灵敏度对观测器中的参数进行整定,在保证系统响应速度的同时,可以有效地补偿模型不确定性和抑制强外界干扰对输出带来的影响。仿真实验检验了所提方法的有效性。
A modified disturbance observer（DOB） based on robust specification is proposed to improve the disturbance rejection performance of multi-input multi-output（MIMO） system with time delay. A novelty fractional order low pass filter is introduced in the DOB. The maximum sensitivity and complementary maximum sensitivity are applied to set two parameters of the observer by analyzing the influence of two parameters of observer on disturbance rejection. The proposed method can effectively compen-sate the model uncertainty, suppress the effects of strong interference on the output, and guarantee system response speed. The effectiveness of proposed control scheme is illustrated through simulations.
出处
《中国科技论文》
CAS
北大核心
2016年第20期2357-2362,共6页
China Sciencepaper
基金
国家自然科学基金资助项目(61273132)
中央高校基本科研业务费专项资金资助项目(ZY1619)
关键词
多输入多输出系统
分数阶干扰观测器
分数阶低通滤波器
最大灵敏度
最大互补灵敏度
multi-input multi-output system
fractional order disturbance observer
fractional order low pass filter
maximum sen-sitivity
complementary maximum sensitivity
