Now showing items 1-14 of 14

    • Adaptive estimation of time-varying parameters with application to roto-magnet plant 

      Na, Jing; Xing, Yashan; Costa Castelló, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2021-02-10)
      Article
      Open Access
      This paper presents an alternative adaptive parameter estimation framework for nonlinear systems with time-varying parameters. Unlike existing techniques that rely on the polynomial approximation of time-varying parameters, ...
    • Adaptive neural network state predictor and tracking control for nonlinear time-delay systems 

      Na, Jing; Ren, Xuemei; Gao, Yan; Griñó Cubero, Robert; Costa Castelló, Ramon (2010-02)
      Article
      Restricted access - publisher's policy
      A new adaptive nonlinear state predictor (ANSP) is presented for a class of unknown nonlinear systems with input time-delay. A dynamical identification with neu- ral network (NN) is constructed to obtain NN weights and ...
    • Adaptive nonlinear parameter estimation for a proton exchange membrane fuel cell 

      Xing, Yashan; Na, Jing; Chen, Mingrui; Costa Castelló, Ramon; Roda Serrat, Vicente (Institute of Electrical and Electronics Engineers (IEEE), 2022-08)
      Article
      Open Access
      Parameter estimation is vital for modeling and control of fuel cell systems. However, the nonlinear parameterization is an intrinsic characteristic in the fuel cell models such that classical parameter estimation schemes ...
    • Composite PID control with unknown dynamics estimator for rotomagnet plant 

      Xing, Yashan; Na, Jing; Costa Castelló, Ramon (2018-01-01)
      Article
      Open Access
      Although PID con trol has b een widely used in practical engineering, its abilit y to reject external disturbance and to handle severe nonlinearities should b e further enhanced. In this pap er, we presen t a simple robust ...
    • Composite PID control with unknown dynamics estimator for rotomagnet plant 

      Xing, Yashan; Na, Jing; Costa Castelló, Ramon (2018)
      Conference report
      Open Access
      Although PID control has been widely used in practical engineering, its ability to reject external disturbance and to handle severe nonlinearities should be further enhanced. In this paper, we present a simple robust unknown ...
    • Control-oriented modelling and analysis of a solid oxide fuel cell system 

      Xing, Yashan; Costa Castelló, Ramon; Na, Jing; Renaudineau, Hugues Jean-Marie (2020)
      Article
      Open Access
      In this paper, a control-oriented model of a solid oxide fuel cell system is formulated and analyzed in detail. First, a lumped model based on first principle laws is formulated and tuned using experimental data coming ...
    • Disturbance Observer based Repetitive Controller for Time-Delay Systems 

      Na, Jing; Costa Castelló, Ramon; Griñó Cubero, Robert; Xuemei, Ren (2009-09-22)
      Conference report
      Open Access
      This paper presents a discrete control design for time-delay systems subjected to the periodical command signal or exogenous disturbances. Unlike other deadtime compensators (DTC), we take profit of the system components ...
    • Modelling and adaptive parameter estimation for a piezoelectric cantilever beam 

      Wang, Bin; Costa Castelló, Ramon; Na, Jing; Torre Rodríguez, Óscar de la; Escaler Puigoriol, Francesc Xavier (2022)
      Article
      Open Access
      This paper proposes a new adaptive estimation approach to online estimate the model parameters of a piezoelectric cantilever beam. The beam behavior is firstly modeled using partial differential equations (PDE) considering ...
    • Real-time adaptive parameter estimation for a polymer electrolyte membrane fuel cell 

      Xing, Yashan; Na, Jing; Costa Castelló, Ramon (2019-11-01)
      Article
      Open Access
      In this paper, we propose real-time adaptive parameter estimation methods for a polymer electrolyte membrane fuel cell (PEMFC) to facilitate the modeling and the subsequent control synthesis. Specifically, the electrochemical ...
    • Repetitive control for systems with time-delays and application to robotic servo motor 

      Na, Jing; Ren, Xuemei; Costa Castelló, Ramon; Griñó Cubero, Robert; Guo, Yu (2012-08-20)
      Article
      Restricted access - publisher's policy
      In many industrial robotic applications there is a need to track periodic reference signals and/or reject periodic disturbances. This paper presents a novel repetitive control design for systems with constant time-delays ...
    • Repetitive control for systems with time-delays and application to robotic servo motor 

      Na, Jing; Ren, Xuemei; Costa Castelló, Ramon; Griñó Cubero, Robert; Guo, Y. (2012)
      Conference lecture
      Restricted access - publisher's policy
      In many industrial robotic applications there is a need to track periodic reference signals and/or reject periodic disturbances. This paper presents a novel repetitive control design for systems with constant time-delays ...
    • Repetitive control of servo systems with time delays 

      Na, Jing; Ren, Xuemei; Costa Castelló, Ramon; Guo, yu (2014-03)
      Article
      Restricted access - publisher's policy
      In many industrial robotic servo applications there is a need to track periodic reference signals and/or reject periodic disturbances. Moreover, time-delays are usually unavoidable in control systems due to the sensoring ...
    • Sensitivity analysis and calibration for a two-dimensional state-space model of metal hydride storage tanks based on experimental data 

      Chen, Mingrui; Batlle Arnau, Carles; Escachx Estévez, Bryan; Costa Castelló, Ramon; Na, Jing (Elsevier, 2024-06-12)
      Article
      Open Access
      In this paper, a state-space model of a metal hydride tank is formulated and analyzed in detail. Firstly, a three-dimensional state-space model of the metal hydride tank is simplified by assuming that the tank temperature ...
    • Temperaturecontrol for a proton-exchange membrane fuel cell system with unknown dynamic compensations 

      Xing, Yashan; Costa Castelló, Ramon; Na, Jing (Wiley-Blackwell, 2020-10-23)
      Article
      Open Access
      Numerous control strategies of temperature regulation have been carried out for proton-exchange membrane fuel cell systems including a cooling fan in order to ensure operation at the desired condition and extend the lifetime ...