Recently there has been an increasing interest in primal-dual methods for model predictive control (MPC), which require minimizing the (augmented) Lagrangian at each iteration. We propose a novel first order method, termed proportional-integral projected gradient MPC where underlying finite horizon optimal problem both state and input constraints. Instead of Lagrangian, iteration our method onl...

A computer-based, proportional-integral control system for supersonic blowdown wind tunnels was developed in a LabVIEW environment. The control algorithm is based on numerically integrating the differential equations used to model a supersonic blowdown wind tunnel in which the proportional and integral control terms were added and tuned in a simulation to determine their appropriate values. Val...

This paper suggests to replace PIs and PIDs, which play a key role in control engineering, by intelligent Proportional-Derivative feedback loops, or iPDs, are derived from model-free control. standpoint is enhanced laboratory experiment.

In this paper a procedure to evaluate and redesign simplified dynamic decouplers using relay-based experiment is applied to a TITO laboratory-scale thermal process. This procedures was originally proposed in (Acioli Júnior and Barros, 2011). The aim of the procedure is to reach effective decoupling at frequencies of interest for control purposes. Keywords— Decoupling Control, Simplified Decoupl...

Even though employed widely in industrial practice, the popular proportional– integral–derivative (PID) controller has weaknesses that limit its achievable performance. In this paper, an alternative control scheme that combines the simplicity of the PID controller with the versatility of model predictive control is presented. The result is a controller that combines the time-delay compensation ...

The tracking of a given voltage in the traditional double closed-loop proportional integral control current power grid simulator has problems such as static difference, delay and oscillation. It is proposed that outer loop inner inverter side adopt quasi-proportional resonance respectively, topology adopts cascaded modular design to establish single-phase model. Compared with proportional-integ...

We present a new filter based method for the calculation of PI achievable performance for simple feedback control systems. We also extend this new approach to multiloop systems and address some key questions such as (a) what would be the performance with alternate loop pairing? (b) what performance improvement will accrue through the use of decouplers in multiloop control systems? Copyright  2...

A novel fractional order (FO) fuzzy Proportional-Integral-Derivative (PID) controller has been proposed in this paper which works on the closed loop error and its fractional derivative as the input and has a fractional integrator in its output. The fractional order differ-integrations in the proposed fuzzy logic controller (FLC) are kept as design variables along with the input-output scaling f...

This paper proposes a control strategy applied to three-phase induction motor (TIM) subject parametric uncertainties, perturbations, and input time delay, whose primary objective is achieve high-performance speed–torque control. The design involves predictive sliding mode observer (P-SMO) robust proportional–integral (PISM), aimed at reducing the detrimental effects of delay perturbations. prop...