This paper addresses the stability and performance enhancement of bilateral teleoperation systems subject to communication delays. We propose a systematic design methodology for delay-based controllers, including a proportional–delayed ( \(P\delta \) ) and a proportional–integral–delayed ( \(P^2\delta ^2I\) ) scheme, to achieve precise kinematic correspondence and high transparency between local and remote devices. By leveraging \(\sigma \) -stability theory, we characterize the roots of the closed-loop characteristic quasipolynomials and establish stability regions in the controller parameter space. The methodology includes a stepwise tuning procedure that guarantees a prescribed exponential decay rate while accounting for communication-induced delays. Stability crossing curves and crossing directions are employed to identify robust regions of operation, ensuring the system remains in the left-half complex plane. Numerical examples demonstrate the effectiveness of the proposed approach, highlighting improvements in transient response and damping compared to classical proportional–delayed controllers. The results provide a practical framework for designing teleoperation controllers that reconcile stability, transparency, and responsiveness under realistic delay conditions.

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A Systematic Design of Delay-Based Controllers for Bilateral Teleoperation with Communication Delays

  • Erick-Ricardo Castillo-Martínez,
  • César-Fernando Méndez-Barrios,
  • José-Enrique Hernández-Díez,
  • Hugo-Iván Medellín-Castillo,
  • Emilio-J. González-Galván

摘要

This paper addresses the stability and performance enhancement of bilateral teleoperation systems subject to communication delays. We propose a systematic design methodology for delay-based controllers, including a proportional–delayed ( \(P\delta \) ) and a proportional–integral–delayed ( \(P^2\delta ^2I\) ) scheme, to achieve precise kinematic correspondence and high transparency between local and remote devices. By leveraging \(\sigma \) -stability theory, we characterize the roots of the closed-loop characteristic quasipolynomials and establish stability regions in the controller parameter space. The methodology includes a stepwise tuning procedure that guarantees a prescribed exponential decay rate while accounting for communication-induced delays. Stability crossing curves and crossing directions are employed to identify robust regions of operation, ensuring the system remains in the left-half complex plane. Numerical examples demonstrate the effectiveness of the proposed approach, highlighting improvements in transient response and damping compared to classical proportional–delayed controllers. The results provide a practical framework for designing teleoperation controllers that reconcile stability, transparency, and responsiveness under realistic delay conditions.