This note puts forward a parametrization of all stabilizing two-degree-of-freedom (2DOF) controllers for (possibly unstable) processes with dead-time. The proposed parametrization is based on a doubly coprime factorization of the plant and takes the form of a generalized Smith predictor (dead-time compensator) feedback part and a finitedimensional feedforward part (prefilter). Some alternative ...

Abstract Forward and inverse kinematic analysis of 2DOF robot is presented to predict singular configurations. Cosine function is used for servo motor simulation of kinematics and dynamics using Pro/Engineer. The significance of joint-2 for reducing internal singularities is highlighted. Performance analysis in terms of condition number, local conditioning index and mobility index is carried ou...

The tracking control of a suspension durability test simulator is investigated in this paper. The objective is to control a hydraulically actuated durability simulator, so that vehicle responses, previously measured on the test track, can be reproduced in the laboratory. A two-degree-of-freedom (2DOF) H∞ control design procedure is proposed to improve tracking performance in the face of noise a...

Renewable energy-based hybrid power systems are being increasingly deployed across the globe to reduce carbon emissions. The system frequency and tie-line tend fluctuate due operating conditions. These fluctuations can be maintained within desired limits using optimally designed controllers. In this article, recently developed improved squirrel search algorithm (ISSA) is used tune parameters of...

This paper proposes a new technique to design a fixed-structure robust loop shaping controller for the pneumatic servosystem. In this paper, a new method based on a particle swarm optimization (PSO) algorithm for tuning the weighting function parameters to design an H∞ controller is presented. The PSO algorithm is used to minimize the infinity norm of the transfer function of the nominal closed...

In this paper, the position control of a detuned indirect field oriented control (IFOC) induction motor servo drive is studied. A PID-fuzzy logic position controller (PID-FLPC) is designed and analyzed to achieve high-dynamic performance both in the position command tracking and load regulation characteristics for robotic applications. The performance of the proposed PID-fuzzy logic and synchro...

The double impulse is introduced as a substitute of the fling-step near-fault ground motion and a critical elastic–plastic response of a two-degree-of-freedom (2DOF) building structure under the “critical double impulse” is evaluated. Since only the free-vibration appears under such double impulse, the energy balance approach plays an important and essential role in the derivation of the soluti...