In various applications in the field of control engineering, estimation state variables dynamic systems presence unknown inputs plays an important role. Existing methods require so-called observer matching condition to be satisfied, rely on boundedness e or exhibit increased order at least twice plant order. this article, a novel normal form for strongly observable linear time-invariant multiva...

The paper presents an observer-based estimation of sensor fault for control systems affected by friction force. In such systems, the non-linearity force leads to deteriorating capability observer. Hence, challenge is design observer capable attaining robust while avoiding effects friction. To overcome highlighted challenge, Unknown Input Observer (UIO) designed decouple as well estimate state a...

In this paper, we propose a new time-domain design of an Unknown Input functional Observer (UIFO) for delayed singular systems with known and unknown inputs. The order of this observer is equal to the dimension of the vector to be estimated. Constant and variable delays act on the known input vectors and a variable state delay is also taken into account. The proposed approach is based on the un...

Numerous communications and networking challenges prevent deploying unmanned aerial vehicles (UAVs) in extreme environments where the existing wireless technologies are mainly ground-focused; and, as a consequence, air-to-air channel for UAVs is not fully covered. In this paper, we address crucial problem of beamforming UAV-based by utilizing spatial estimation algorithm, which relies on theory...