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Negative derivative feedback control and bifurcation in a two-degree-of-freedom coupled dynamical system

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  • Bauomy, H.S.
  • EL-Sayed, A.T.
  • Amer, T.S.
  • Abohamer, M.K.

Abstract

A popular benchmark problem in the field of control is the cart-pendulum system. The system has only one control input for two degrees of freedom (2DOF), making it utterly underactuated. Its highly nonlinear structure makes it suitable for validating a variety of linear and nonlinear controllers. There are numerous applications, such as rocket propellers, tank missile launchers, self-balancing robots, ship stabilisation, earthquake-resistant building design, etc. This work describes a control and bifurcation method for the response vibrations of the 2DOF auto-parametric pendulum (Cart-pendulum) model with harmonic excitation. To reduce the detrimental vibrations created by the system's operation, it is managed via negative derivative feedback (NDF). Bifurcation analysis is conducted on the studied model at two different gain values of the controller to identify various bifurcations occurring within the system. The main aim of this study is to explore the effectiveness of the control method and bifurcation analysis in stabilising pendulum vibrations. By using the averaging technique to solve the nonlinear differential equations and modelling the system using an NDF controller, an analytical solution is produced. The Runge–Kutta technique fourth-order (RK4) is used to compare the approximate answers to the numerical simulations and find a good match. The stability and steady-state amplitude of nonlinear systems were examined and compared before and after control. After implementing the NDF control mechanism, it was discovered that a number of system factors had an impact. To verify their comparability, MATLAB software was used to compare the numerical and analytical solutions at time-history and FRCs. Frequency response curves (FRCs) and ideal system operating conditions were investigated at different controller and system parameter values. Finally, the chaos motion and vibration amplitude of the system are suppressed by the control systems.

Suggested Citation

  • Bauomy, H.S. & EL-Sayed, A.T. & Amer, T.S. & Abohamer, M.K., 2025. "Negative derivative feedback control and bifurcation in a two-degree-of-freedom coupled dynamical system," Chaos, Solitons & Fractals, Elsevier, vol. 193(C).
    • Handle: RePEc:eee:chsofr:v:193:y:2025:i:c:s0960077925001511
    DOI: 10.1016/j.chaos.2025.116138
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    References listed on IDEAS

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    1. EL-Sayed, A.T. & Bauomy, H.S., 2022. "NIPPF versus ANIPPF controller outcomes on semi-direct drive cutting transmission system in a shearer," Chaos, Solitons & Fractals, Elsevier, vol. 156(C).
    2. Bauomy, H.S. & EL-Sayed, A.T., 2023. "Safety of a quarter-vehicle car through negative derivative feedback controller," Chaos, Solitons & Fractals, Elsevier, vol. 166(C).
    3. Stachowiak, Tomasz & Okada, Toshio, 2006. "A numerical analysis of chaos in the double pendulum," Chaos, Solitons & Fractals, Elsevier, vol. 29(2), pages 417-422.
    4. Gitterman, M., 2010. "Spring pendulum: Parametric excitation vs an external force," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 389(16), pages 3101-3108.
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