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Valentin Pletea-Marinescu


Email LinkedIn GitHub


About Me

Embedded AI & Control Systems Engineer focused on:

  • computer vision
  • robotics
  • real-time systems
  • experimental control engineering
  • edge AI inference
  • distributed intelligent systems

I enjoy building complete systems — from mathematical modeling and control design to embedded firmware, AI inference pipelines and cloud-native backend infrastructure.

Currently pursuing a B.Sc. in Computer Science at the National University of Science and Technology POLITEHNICA Bucharest, Faculty of Automatic Control and Computer Science.


Research Interests

  • Embedded AI
  • Computer Vision
  • Robotics & Autonomous Systems
  • Optimal & Adaptive Control
  • Real-Time Systems
  • System Identification
  • Edge Inference
  • Retrieval-Augmented LLM Systems
  • Intelligent Monitoring Systems

Selected Projects

AI-Based Anti-Plagiarism Monitoring System

Real-time multimodal exam monitoring platform combining:

  • gaze estimation using MediaPipe Face Mesh (468 landmarks)
  • adaptive Kalman filtering
  • dual YOLOv8 pipelines for smartphone and smartwatch detection
  • audio activity detection + Romanian speech transcription
  • motorized gimbal classroom scanning
  • multi-student orchestration and event persistence

Key Results

  • 25+ FPS CPU-only inference
  • <820 MB RAM usage
  • 92.4% gaze-direction accuracy
  • 88.6% smartphone detection accuracy
  • 92.5% smartwatch detection accuracy
  • fully local GDPR-oriented processing

Publication

First-author paper published at RoEduNet 2025 (ISI Indexed Conference).

Repository:

  • private research repository
  • extended into 70+ page Bachelor's thesis

Hold My Coffee — Active Stabilization Platform

Repository:

3-DOF active beverage stabilization platform designed for experimental comparison of classical, optimal and adaptive control strategies.

Features

  • dual-MCU architecture
  • Teensy 4.1 + Arduino UNO
  • BLDC FOC motor control via Moteus drivers
  • FDCAN communication
  • N4SID system identification
  • reduced-order modeling
  • disturbance rejection benchmarking
  • experimental controller comparison on real hardware

Implemented Controllers

  • PID
  • RST
  • LQG
  • MRAC

Additional Work

  • automated testing framework
  • custom Composite Performance Assessment (CPA) metric
  • MATLAB identification + simulation pipeline
  • embedded real-time implementation

Paper currently under preparation.


Wine-Quality — Retrieval-Augmented LLM Classification

Repository:

Research project exploring retrieval-augmented prompting for ordinal NLP classification using local open-weight LLMs.

Implemented

  • class-balanced semantic retrieval
  • frozen sentence embeddings
  • retrieval-augmented prompting
  • semantic nearest-neighbor search
  • comparative evaluation across open-weight LLMs

Evaluated Models

  • Mistral
  • Gemma
  • Qwen

Results

Achieved ~90% classification accuracy without model fine-tuning.

Paper under preparation.


Experience

Research Assistant — POLITEHNICA Bucharest

May 2025 – April 2025

Worked on applied research projects involving:

  • AI-based anti-plagiarism systems
  • ESG analytics using LLMs
  • retrieval-augmented document intelligence
  • cloud-native AI pipelines
  • distributed backend services

Experience

Proposal Engineer — Honeywell

May 2026 – Present


Research Assistant — POLITEHNICA Bucharest

May 2025 – April 2026

Worked on applied research projects involving:

  • AI-based anti-plagiarism systems
  • ESG analytics using LLMs
  • retrieval-augmented document intelligence
  • cloud-native AI pipelines
  • distributed backend services

Technologies

  • FastAPI
  • Docker
  • AWS EC2
  • PostgreSQL
  • Python
  • LLM APIs
  • embeddings & retrieval systems

Publications

Anti-Plagiarism System for Exam Monitoring

RoEduNet Conference 2025 — ISI Indexed First Author


Awards & Achievements

  • 🥇 1st Place — Scientific Communications Session (SCSS 2025)
  • 🥇 1st Place — TechChallenge & RoboChallenge 2025 (Freestyle) & RoboTEC (Freestyle)
  • 📄 First Author — RoEduNet 2025 (ISI Indexed)
  • 🔧 Open Source Contributor — Rust rencfs

Technical Stack

Domain Technologies
Languages Python, C, C++, Java, TypeScript
AI / CV YOLOv8, OpenCV, MediaPipe, PyTorch, LLMs
Embedded STM32, Teensy 4.1, Arduino, FDCAN
Control PID, RST, LQG, MRAC, Kalman Filtering
Backend FastAPI, Docker, PostgreSQL
Cloud AWS EC2, Linux, OpenShift
Frontend React
Tooling Git, MATLAB, Simulink

GitHub Analytics






Contact

Email LinkedIn GitHub


Pinned Loading

  1. camera-gimbal-stabilizer camera-gimbal-stabilizer Public

    This project is a two-axis camera gimbal stabilizer that uses an MPU6050 sensor to provide orientation data to an STM32F401RE microcontroller via I2C. The STM32 processes the data through Kalman fi…

    C 5 3

  2. Stabilization-Platform Stabilization-Platform Public

    3-DOF beverage stabilization platform comparing PID, RST, LQG, and MRAC controllers. Teensy 4.1 + Arduino UNO, Moteus BLDC drivers, BNO055 IMU. Includes MATLAB scripts and experimental datasets.

    Python

  3. Wine-Quality Wine-Quality Public

    Jupyter Notebook