PID Tuner Simulator

An interactive, web-based PID tuning simulator with a response optimization auto-tuner. This platform is specifically designed for educational purposes in process control, automation, and related engineering courses.

Developed by Wenjin Zhou and Wei Zhang from Taiyuan University of Technology.

---

Features

• Real-time Dynamic Simulation: Simulate closed-loop PID control and visualize SP, PV, and OP curves dynamically.
• Manual PID Tuning: Freely adjust Kc, Ti, and Td parameters to intuitively understand their effects on control performance.
• One-Click Auto-Tuning: Utilizes a sophisticated Response Optimization algorithm to automatically find the optimal PI parameters for the current process.
• Switchable Process Models: Supports two classic process models:
  • First-Order Process: G(s) = 1 / (5s + 1)
  • Second-Order Underdamped Process: G(s) = 25 / (s² + 3s + 25)
• Dead Time Simulation: Allows setting a process dead time (delay) to study its critical impact on system stability.
• Purely Web-Based: Built with standard HTML, CSS, and JavaScript. No installation or plugins are required. It can be easily embedded into digital textbooks, online courses, or presentations.

How to Use

A. Manual Simulation

1. Set Parameters: In the "Simulation Input" area, configure the controller parameters (Kc, Ti, Td), select a process model, and set the dead time (Delay).
2. Run Simulation: Click the "Run Simulation (Manual)" button to perform a simulation with the current parameters. The results will be plotted in the output area.

B. Auto-Tuning (Response Optimization)

1. Set Process: Select the desired process model and dead time.
2. Start Auto-Tuning: Click the "Auto-Tune" button.
3. Observe: The system will automatically perform a two-stage optimization:
   • Stage 1: Identify an approximate process model.
   • Stage 2: Run an iterative numerical optimization to find the best PI parameters that minimize a comprehensive cost function (based on ITAE, overshoot, settling time, etc.).
4. Get Results: The optimized Kc and Ti values will be automatically filled into the input fields, and a new simulation will run to display the excellent control performance.

For Educators

This tool is designed to be seamlessly integrated into digital learning environments. It transforms static textbook graphs into a hands-on "virtual lab," enhancing student engagement and providing a deeper understanding of PID control theory and practice.

License & Copyright

© 2025 Wenjin Zhou, Wei Zhang, Taiyuan University of Technology. All Rights Reserved.

This software is intended for educational and demonstrational purposes only. Commercial use is prohibited without permission.