Leví Gadiel Sojos González

A predictive controller loses performance when the plant drifts from the model it was identified with. Calibrate proposes re-identifying that model while the controller operates, but for that it needs to be connected to the plant with historical data being recorded. The question was whether it could recover a correct model after a plant change.

• I built a simulated blending plant in Simulink and connected it to DMC3 via OPC UA.
• I set up the real-time data historization and kept it running.
• I introduced an intentional gain change in the plant and tested whether Calibrate detected and corrected it.

In a four-coupled-tank plant, each pump affects more than one level, so controlling each level separately is difficult and a disturbance in one tank propagates to the others. Testing controllers directly on the real plant is slow and risky.

• I trained an ANFIS model of the plant to design and test the control in simulation first, before moving to the real plant.
• Programmed the fuzzy (Sugeno) controller with feedforward compensators in MISO structure on the Allen-Bradley PLC.
• I collaborated on the HMI under ISA-101; the main development was handled by a classmate.

Design an isolated switched-mode power supply with remote monitoring, combining power electronics, firmware and supervision.

• LTspice simulation at 60 kHz with RCD snubber.
• ESP32 node measuring voltage and sending it via Wi-Fi (TCP/IP sockets).

• Calculated and hand-wound the ferrite transformer.
• Programmed the PIC18F4550 in C to generate the PWM.
• Developed the asynchronous HMI in Python (PySide6).
• On the PCB, handled component selection and footprints.

Implement a batch control strategy on a PLC for a plant with a tank, jacket and heat exchanger, coordinating level, flow and temperature variables through a sequence of stages and transitions.

• Modeled and configured the setup (jacketed tank and heat exchanger) and the level, flow and temperature loops.
• Programmed the PID loops and commissioned the batch sequence on the PLC.

• Implemented the SFC diagram of the batch sequence on an Allen-Bradley PLC.
• Programmed the flow loop PID in Structured Text.
• Tuned and applied the gain scheduler to the flow loop to handle its nonlinear behavior.