Flight Control Law Using Composite Nonlinear Feedback Technique for a Mars Airplane

Journal of Vibration and Control

Mobayen

et al. 2022

In this research, based on the integral sliding-mode scheme, a robust composite nonlinear feedback (CNF) control is addressed for time-delayed uncertain systems. Such an uncertain system may contain some complexities like time-varying delays, actuators saturation, and exterior disturbances. Hence, the tracking problem would be solved under the mentioned constraints. Thus, for achieving these goals, the tracking problem is firstly formulated by considering system’s limitations. The controller parameters may be determined via a solution for linear matrix inequality. As a result, the CNF tracker law is numerically simulated in some control cases. The simulation outcomes are compared with a similar technique in terms of the transient response, boundedness of the error, and the disturbance rejections. Thus, the findings illustrate the efficiency of the advised CNF control method comparing to the recent technique.

Section: Introductionmentioning

confidence: 99%

Robust composite nonlinear feedback control based on integral sliding-mode control of uncertain time-delay systems under input saturation

Hu¹,

Journal of Vibration and Control

Mobayen

et al. 2022

“…The CNF has been generalized to track sinusoidal and ramp references [10]. Some CNF controllers have been presented to practical systems such as quadrotors, overhead crane, autonomous vehicles, and a Mars airplane [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

An innovative algorithm for tuning of composite nonlinear feedback control in continuous‐time systems

Vazani

Asian Journal of Control

2022

The transient response improvement is the most crucial feature of the composite nonlinear feedback (CNF) controllers. This study proposes a novel CNF tuning method for systems subject to saturation. To achieve the goals, the linear part is optimally obtained via a performance index and the linear matrix inequality (LMI). Then, employing the passivity property, a heuristic way is suggested to adjust the nonlinear term. Thus, the automatic and online features would be the key novelties of this algorithm compared with the offline, trial and error, or nonautomatic ones. Some systems are simulated to evaluate the technique and compare with the existing methods. The outcomes confirm that the proposed tuning yields outstanding improvement concerning the aforementioned systems.

“…In recent times, various CNF technique has been implemented in some practical control problems. These shortly include the chemical rector [19,20], high-speed positioning [2], robot arms [21], flight control [22], overhead crane servo system [23], path-following of actuated autonomous vehicle [24], servo-positioning [25], hard disk drive [9,26], voltage source inverter [27,28], planar motor [29] and inverted pendulum with magnetic ball suspension [27].…”

Section: Introductionmentioning

confidence: 99%

An improved control technique for designing of composite non‐linear feedback control in constrained time‐delay systems

IET Control Theory & Appl

2020

In this research, a novel delay‐dependent composite non‐linear feedback (CNF) control would be pointed for non‐linear time‐delay systems under actuator saturation. For this aim, first, the CNF controller would be formulated in the constrained time‐delay systems. Then, a linear matrix inequality (LMI) approach is presented to obtain the controller parameters. Hence, the control synthesis of the constrained non‐linear time‐delay systems is transformed into an optimisation problem subjected to some LMIs. The suggested controller is simulated in some numerical examples like a chemical reactor with separator and recycle. The computed quantitative results will demonstrate the capability of the proposed CNF control approach compared to other best methods.