In this paper, a multisource disturbances attenuation and rejection control method is proposed for linear systems with unmeasured states under process and measurement disturbances. Since some internal states of control systems are hard to be measured via sensors in the realistic engineering process, a novel output feedback control scheme is proposed for designing the anti-disturbance controller by using measurement outputs, although these outputs mix with measurement disturbances. In addition, the dynamics of control system states also suffer from the influence of multiple process disturbances. To enhance the anti-disturbance ability of control systems, two kinds of disturbance observers are adopted to estimate process and measurement disturbances, respectively. And the anti-disturbance output feedback controller is constructed based on the process disturbance observer, state observer and control theory. In which the state observer is built via the measurement outputs and measurement disturbance observer. Then, the linear matrix inequality technology is used for analyzing the stability of closed-loop systems and decoupling the observers and the controller. Finally, the effectiveness of proposed control scheme is verified by using a numerical example.

中文翻译：

---

过程和测量扰动下具有未测量状态的线性系统的多源扰动抑制控制

本文提出了一种针对过程和测量扰动下具有不可测量状态的线性系统的多源扰动衰减和抑制控制方法。由于在实际工程过程中控制系统的某些内部状态很难通过传感器测量，因此提出了一种新颖的输出反馈控制方案，利用测量输出来设计抗干扰控制器，尽管这些输出与测量干扰混合在一起。此外，控制系统状态的动态性还受到多种过程扰动的影响。为了增强控制系统的抗扰动能力，采用两种扰动观测器分别估计过程扰动和测量扰动。并基于过程扰动观测器、状态观测器和控制理论构建了抗扰动输出反馈控制器。其中状态观测器是通过测量输出和测量扰动观测器构建的。然后，利用线性矩阵不等式技术分析闭环系统的稳定性，解耦观测器和控制器。最后，通过数值算例验证了所提出控制方案的有效性。