Torque saturation in bipedal robotic walking through control Lyapunov function-based quadratic programs

K Galloway, K Sreenath, AD Ames, JW Grizzle - IEEE Access, 2015 - ieeexplore.ieee.org
This paper presents a novel method to address the actuator saturation for nonlinear hybrid
systems by directly incorporating user-defined input bounds in a controller design. In …

HJB optimal feedback control with deep differential value functions and action constraints

M Lutter, B Belousov, K Listmann… - … on Robot Learning, 2020 - proceedings.mlr.press
Learning optimal feedback control laws capable of executing optimal trajectories is essential
for many robotic applications. Such policies can be learned using reinforcement learning or …

Continuous-time fitted value iteration for robust policies

M Lutter - Inductive Biases in Machine Learning for Robotics and …, 2023 - Springer
One approach to obtain the optimal control inputs that maximize the reward, is to solve the
equation, as this differential equation expresses a sufficient and necessary condition for …

An approximate wind turbine control system model for wind farm power control

Y Guo, SH Hosseini, CY Tang, JN Jiang… - IEEE Transactions …, 2012 - ieeexplore.ieee.org
Wind farm power control is key to reliable large-scale wind integration. The design of a
sophisticated wind farm controller, however, is challenging partly because there is a lack of …

Stable process approach to analysis of systems under heavy-tailed noise: Modeling and stochastic linearization

K Kashima, H Aoyama, Y Ohta - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
The Wiener process has provided a lot of practically useful mathematical tools to model
stochastic noise in many applications. However, this framework is not enough for modeling …

Stochastic linearisation approach to performance analysis of feedback systems with asymmetric nonlinear actuators and sensors

PT Kabamba, SM Meerkov… - International Journal of …, 2015 - Taylor & Francis
This paper considers feedback systems with asymmetric (ie, non-odd functions) nonlinear
actuators and sensors. While the stability of such systems can be investigated using the …

Performance degradation due to measurement noise in control systems with disturbance observers and saturating actuators

G Na, NH Jo, Y Eun - Journal of the Franklin Institute, 2019 - Elsevier
Augmenting feedback control systems with disturbance observer (DOB) is a widely used
technique in system design to compensate for the effect of exogenous disturbances as well …

A Quasilinear Quadratic Tracking Method for Systems With Saturating Actuators

L He, M Li, Y Ni, Y Tong - International Journal of Robust and …, 2024 - Wiley Online Library
Linear quadratic tracker (LQT) is usually employed to solve unconstrained tracking problems
but falls short when dealing with systems exhibiting actuator saturation. This paper presents …

Stochastic linearization of feedback systems with multivariate nonlinearities and systems with state-multiplicative noise

S Brahma, HR Ossareh - IEEE Transactions on Automatic …, 2021 - ieeexplore.ieee.org
Quasilinear control (QLC) theory provides a set of methods intended for the analysis and
design of stochastic feedback systems with static nonlinearities. QLC leverages the method …

Quasilinear control of wind farm power output

Y Guo, PT Kabamba, SM Meerkov… - … on Control Systems …, 2014 - ieeexplore.ieee.org
Quasilinear Control (QLC) is a set of methods for analysis and design of systems with
nonlinear actuators and sensors. The approach of QLC is based on the method of stochastic …