scholarly journals Power-Weighted Divergences for Relative Attenuation and Delay Estimation

2016 ◽  
Vol 23 (11) ◽  
pp. 1612-1616 ◽  
Author(s):  
Ruairi de Frein ◽  
Scott Thurston Rickard
Keyword(s):  
Delay Estimation ◽  
Relative Attenuation

scholarly journals A Novel Adaptive Super-Twisting Sliding Mode Control Scheme with Time-Delay Estimation for a Single Ducted-Fan Unmanned Aerial Vehicle

Actuators ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 54
Author(s):  
Minh-Thien Tran ◽  
Dong-Hun Lee ◽  
Soumayya Chakir ◽  
Young-Bok Kim
Keyword(s):  
Time Delay ◽  
Sliding Mode Control ◽  
Unmanned Aerial Vehicle ◽  
Sliding Mode ◽  
Time Delay Estimation ◽  
Delay Estimation ◽  
Mode Control ◽  
Ducted Fan ◽  
Control Scheme ◽  
Aerial Vehicle

This article proposes a novel adaptive super-twisting sliding mode control scheme with a time-delay estimation technique (ASTSMC-TDE) to control the yaw angle of a single ducted-fan unmanned aerial vehicle system. Such systems are highly nonlinear; hence, the proposed control scheme is a combination of several control schemes; super-twisting sliding mode, TDE technique to estimate the nonlinear factors of the system, and an adaptive sliding mode. The tracking error of the ASTSMC-TDE is guaranteed to be uniformly ultimately bounded using Lyapunov stability theory. Moreover, to enhance the versatility and the practical feasibility of the proposed control scheme, a comparison study between the proposed controller and a proportional-integral-derivative controller (PID) is conducted. The comparison is achieved through two different scenarios: a normal mode and an abnormal mode. Simulation and experimental tests are carried out to provide an in-depth investigation of the performance of the proposed ASTSMC-TDE control system.

scholarly journals An Adaptive All-Pass Filter for Time-Varying Delay Estimation

2021 ◽  
pp. 1-1
Author(s):  
Beth Jelfs ◽  
Shuai Sun ◽  
Kamran Ghorbani ◽  
Christopher Gilliam
Keyword(s):  
Delay Estimation ◽  
Time Varying ◽  
Pass Filter ◽  
Time Varying Delay ◽  
Varying Delay
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