Forthcoming articles

 


International Journal of Nonlinear Dynamics and Control

 

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International Journal of Nonlinear Dynamics and Control (6 papers in press)

 

Regular Issues

 

  • Reduced Order Synchronization for Circular Restricted Three Body Problem using Adaptive Sliding Mode Controller   Order a copy of this article
    by Mohammad Shahzad 
    Abstract: This paper studies the reduced order synchronization for a circular restricted three body problem and Lorenz system as drive and response systems respectively via a robust adaptive sliding mode control in which controllers are based on negligible chattering phenomenon. The entire study has been carried out under the effect of both unknown model uncertainties and external disturbance. Also for the same drive-response system, a secure communication scheme has been presented.
    Keywords: Chaos synchronization; Adaptive sliding mode control; Circular restricted three body problem.

  • Chaos Control of Non Linear Aeroelastic Pitch Plunge Model   Order a copy of this article
    by Raja Venkata Narasinga Rao, Chandramouli Padmanabhan 
    Abstract: This paper deals with the control of chaos in a non-linear aeroelastic pitch-plunge model for aircraft wings. While design of non-linear controllers to asymptotically stabilize the initial bifurcation exists in the current literature, the primary goal of this paper is to control the chaotic motion using feedback linearization. For this purpose, a pitch-plunge model with two flaps is considered for the study. The approach proposed for the control of chaos is that of a tracking problem where the system is controlled to a defined limit cycle; thus the chaotic motion is replaced by orbital stability. Using Lie Algebra, a feedback linearization is performed by transforming the non-linear space to a linear one. The error dynamics is established as the deviation of the chaotic trajectory from that of the desired path and tracking is achieved by reducing the error to zero. The ability of this approach to control chaos is demonstrated for a certain set of parameters of the pitch-plunge model, chosen from the literature. In order to validate the approach followed in this paper, the R{\"o}ssler system undergoing chaotic motion is tracked to a LCO and results are compared with the literature
    Keywords: Flutter; Chaos; Feedback Linearization; Tracking Control.

Special Issue on: Synchronisation and Nonlinear Control Engineering Systems

  • Nonlocal coupling among oscillators mediated by fast travelling waves   Order a copy of this article
    by Raul Aristides, Ricardo Viana 
    Abstract: We propose a general model for coupling among oscillators mediated by wave propagation in the spatial region in which the oscillators are embedded. Particular cases are presented in one, two, and three spatial dimensions.
    Keywords: synchronization; coupled oscillators; non-local coupling.

Special Issue on: GEEE-2018 New Contributions on Advanced Control Techniques

  • Spacecraft Attitude Maneuver using Robust Generalized Dynamic Inversion   Order a copy of this article
    by Uzair Ansari, Abdulrahman Bajodah 
    Abstract: This paper presents the design of rigid body spacecraft attitude control using Robust Generalized Dynamic Inversion (RGDI). In RGDI control, the particular part is responsible to enforce the constraint dynamics based on the attitude deviation function. The control law is extracted by inverting the prescribed constraint dynamics using Moore-Penrose Generalized Inverse (MPGI). The auxiliary part of the RGDI control which is affine in the null space of the control coefficient vector is utilized to stabilize the angular body rates. The singularity problem is addressed by augmenting the dynamic scale factor in MPGI. To guarantee robustness against parametric variations and disturbances, an additional term based on the concept of Sliding Mode Control is integrated with GDI, such that semi-global practically stable attitude tracking is guaranteed. The RGDI controller's performance is evaluated through numerical simulations on the spacecraft mathematical model whose kinematical and dynamical equations are modeled in Simulink/Matlab environment.
    Keywords: Generalized Dynamic Inversion; Sliding Mode Control; Spacecraft Control; Lyapunov Stability; Robust Control.

  • High gain observer based visual servoing for depth estimation in robotics   Order a copy of this article
    by Lattanavong Thammabanvong 
    Abstract: In the engineering field, we are always facing with the system or process with non-linear type which is not trivial to control its behavior, and to response this problem we just equipped different type of sensors to be able to analyse the output measurement. Unfortunately, we can not use a lot of sensors in a system due to its cost and also the limited in terms of technology examples: finding the temperature in a heater exchange or estimating the impact of the wind on a car, etc. That is why we use to create the virtual sensor called observer to replace or make a redundancy with the physical sensor, by applying this type of sensor we can improve the performance of the system in terms of cost and especially in the case when we can not use the physical sensor. This paper proposes a mono-vision depth estimation method for mobile robots, based on high gain observers. The objective of this paper is to estimate the distance between the robot and target object by using only a camera fixed on-board. The proposed method switches between multiple observers in order to gauge the distance between the camera and the target object. Simulations and experimental results illustrate the practical applicability and benefits of this method for visual servoing.
    Keywords: Range estimation; depth measurement; mono-vision; computer vision; non-linear observer; high gain observer; motion planning; trajectory planning for mobile robot.

  • Free-surface oscillations control of high speed manipulated liquids   Order a copy of this article
    by Marouane Idelhoucine, Hassan Hammouri, Sami Othman, Frederic Roumanet 
    Abstract: In this paper, we first propose an equivalent mechanical model to estimate the liquid oscillations in a partially filled container in an industrial packaging process.rnThe purpose of this study is to control the height of the liquid inside the container during and after a high speed manipulation.rnNo measurements are available in real-time, the levels are measured on a testbed via a camera. Several treatments are applied to the pictures to extract the heights of liquid.rnIn order to satisfy various control specifications such as manipulation-time, constraints of liquid height and motor acceleration, a predictive controller is designed to determine the position reference to apply to the motor. The resulting command is used in open-loop into the process.
    Keywords: Equivalent modeling; Free-surface liquid control; Time-optimal control; Model Predictive Control.