A generalized design method for learning-based disturbance observer

M Zheng, X Lyu, X Liang… - IEEE/ASME Transactions …, 2020 - ieeexplore.ieee.org
This article presents a generalized disturbance observer (DOB) design framework that is
applicable to both multi-input multi-output (MIMO) and/or nonminimum phase systems. The …

Combined design of robust controller and disturbance observer in a fixed-order H∞ control framework

E Daş - Mechatronics, 2022 - Elsevier
The disturbance observer (DOB) and H∞ based robust control methods are widely used in
feedback control applications due to their disturbance rejection capability and robustness …

An optimization-based iterative learning control design method for UAV's trajectory tracking

R Adlakha, M Zheng - 2020 American Control Conference …, 2020 - ieeexplore.ieee.org
This paper presents an iterative learning control (ILC) design method to improve the
unmanned aerial vehicle's (UAV's) tracking performance. ILC is a feedforward control …

A scalable model-based learning algorithm with application to UAVs

X Liang, M Zheng, F Zhang - IEEE control systems letters, 2018 - ieeexplore.ieee.org
Unmanned aerial vehicles (UAVs) play essential roles in many areas including search and
rescue, monitoring, and exploration. As such, fast and accurate trajectory tracking is crucial …

A hybrid disturbance observer for delivery drone's oscillation suppression

Z Chen, C Liu, H Su, X Liang, M Zheng - Mechatronics, 2022 - Elsevier
This paper proposes a new hybrid disturbance observer (DOB) to help suppress disturbance
to the control systems. The proposed hybrid DOB consists of three main parts:(1) an actual …

A two-step optimization-based iterative learning control for quadrotor unmanned aerial vehicles

R Adlakha, M Zheng - Journal of Dynamic Systems …, 2021 - asmedigitalcollection.asme.org
This paper presents a two-step optimization-based design method for iterative learning
control and applies it onto the quadrotor unmanned aerial vehicles (UAVs) trajectory …

Full attitude control of an efficient quadrotor tail-sitter VTOL UAV with flexible modes

W Xu, H Gu, Y Qing, J Lin… - … Conference on Unmanned …, 2019 - ieeexplore.ieee.org
In this paper, we present a full attitude control of an efficient quadrotor tail-sitter VTOL UAV
with flexible modes. This control system is working in all flight modes without any control …

Leader-following almost output consensus for discrete-time heterogeneous multi-agent systems in the presence of external disturbances

T Meng, Z Lin - Systems & Control Letters, 2022 - Elsevier
In this paper, we consider the problem of leader-following almost output consensus for
discrete-time multi-agent systems with heterogeneous follower agents. Conditions on agent …

A preliminary study on a physical model oriented learning algorithm with application to uavs

M Zheng, Z Chen, X Liang - Dynamic Systems …, 2019 - asmedigitalcollection.asme.org
This paper provides a preliminary study for an efficient learning algorithm by reasoning the
error from first principle physics to generate learning signals in near real time. Motivated by …

Improving Disturbance Estimation and Suppression via Learning among Systems with Mismatched Dynamics

H Modi, Z Chen, X Liang… - IEEE Robotics and …, 2024 - ieeexplore.ieee.org
Iterative learning control (ILC) is a method for reducing system tracking or estimation errors
over multiple iterations by using information from past iterations. The disturbance observer …