Influence of packet loss on wireless feedback control systems as a disturbance

Abstract

The knowledge of characteristics of the influence of packet loss is important to design controllers and observers which can reduce this influence on wireless feedback control systems. This paper clarifies the characteristics of the influence of packet loss as a disturbance that causes a difference between transmitted information and used information at the received side. Through the analyses of the influence of packet loss on both controller and controlled object sides, we clarify the power spectrum density of the influence on the controller side is not constant. Numerical results show an well-known approach - H_∞ controller, which can reduce the influence of white disturbances, can not reduce the influence of packet loss. Our analyses will be useful for good modeling of the influence of packet loss to design controllers and observers.