Use of saturation-relay feedback for autotune identification
Use of saturation-relay feedback for autotune identification
复制标题
DOI：
10.1016/0009-2509(95)00371-1
复制
发表时间：
1996-04
影响因子：
4.7
通讯作者：
S. Shen;Hong-Den Yu;Cheng-Ching Yu
中科院分区：
文献类型：
--
作者：
S. Shen;Hong-Den Yu;Cheng-Ching Yu
尽管继电器反馈系统在自调谐识别中取得了成功，但众所周知，理想的（开关）基于继电器的识别可能导致最终增益和最终频率的显着误差。在继电反馈实验后不采取补救措施，而是采取一种方法重新设计实验，以便在整个实验过程中更好地估计Kuand ω - ucn。本文采用饱和继电器代替传统的理想继电器。分析表明，饱和继电器在对宽ω的识别上有明显的提高。但是，饱和继电器的斜率过小也可能无法产生持续的振荡。对线性和非线性系统进行了系统辨识和多变量自整定测试。在保持继电器反馈测试的简洁性的同时，采用所提出的方法可以实现显著的改进。
Despite the success of the relay-feedback system in autotune identification, it is well known that an ideal (on-off) relay-based identification can lead to significant error in the ultimate gain and ultimate frequency. Instead of taking remedial action after relay-feedback experiments, an approach is taken to re-design the experiment such that a better estimate of Kuand ωucan be achieved throughout the experiment. In this work, the saturation relay is employed instead of the conventional ideal relay. The analyses show that the saturation relay gives significant improvement in the identification of Kuand ωu. However, too small a slope in the saturation-relay may also fail to generate sustained oscillation. A procedure is tested on linear and nonlinear systems for system identification and multivariable autotuning. Using the proposed method significant improvement can be achieved while maintaining the simplicity of the relay feedback test.