Gheorghe-Daniel Andreescu

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Modern process control systems are used in industrial automations for flexibility, modularity and reliability, employing state of the art technology based on three concepts: Distributed Control System (DCS), Programmable Logic Controller (PLC) and most importantly Supervisory Control and Data Acquisition (SCADA). This paper deals with design and(More)
Biaxial excitation generator for automobile (BEGA) is proposed as a solution for integrated starter/alternator systems used in hybrid electric vehicles (HEVs). This paper demonstrates through experiments and simulations that BEGA has a very large constant power speed range (CPSR), theoretically to infinite. A vector control structure is proposed for BEGA(More)
SCADA systems are gaining more popularity, including controlled environment applications. A particularity for these processes is that the distributed controlled environment is scattered in different locations. SCADA human machine interfaces (HMI) are accessed remotely, thus the human observers should not be restrained near the process physical location. One(More)
This paper focuses on developing a hardware-in-the-loop (HIL) system for a boiler-turbine process, employing decoupled adaptive control based on gain scheduling technique. The used model is a 3×3 non-linear strongly coupled system adapted to fit a real thermal power plant of 16 MW. The main purpose of this work lies in implementing, comparing and(More)
This paper presents a centralized multivariable adaptive decoupling control using hardware-in-the-loop (HIL) for a boiler-turbine system. The boiler-turbine mathematical model is a 3×3 nonlinear strongly-coupled MIMO system with hard constraints. The proposed control strategy employs decoupling technique, gain scheduling with dynamic model(More)
This paper deals with a real-time (RT) implementation of hardware-in-the-loop (HIL) systems for testing of control strategies in thermal power plants. Three implementation systems are developed and compared by testing, i.e., 1) fully simulated system, 2) non-real-time HIL system with OPC server, and 3) complete real time HIL deterministic system. The(More)
This paper develops a single-phase voltage source inverter mainly containing a high frequency flyback bidirectional DC-DC converter - as a previous stage, and a full-bridge module. The flyback bidirectional converter generates a rectified sinusoidal voltage waveform across the output capacitor. The full bridge transistors switch two times in one AC period(More)
This paper develops a solution for greenhouse climate control employing a modified Smith predictor. For the well-known greenhouse climate model with dead-time, having high nonlinearities and strong coupling, a feedback-feedforward linearization & decoupling method employing measured disturbances is used. The equivalent process has an integrator plus(More)