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# Web based control of pressure loop apparatus

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### Transcript

• 1. Web-Based Control of Pressure Loop Apparatus using LabVIEW Osama Azim (BE/1499/06) Information Technology, VII sem Under: S.S.Tripathi (Department of ECE)
• 2. Control Applications
• 3. Model Based Design for Process Control Systems
• 4. MBD for Web-based Control using LabVIEW
• 5. System Design
• Control System Design (Pressure Loop Control)
• Web-Based Control Design (Virtual Laboratory System)
• 6. Pressure Loop Control Chamber Compressed Air
• 7. Control System Design Closed Loop Feedback System Pressure Loop Control
• 8. P, PI and PID Control
• Proportional Response: Difference between the set point and the process variable . Increasing the proportional gain (K c ) will increase the speed of the control system response.
• Integral Response: Sums the error term over time. Effect is to drive the Steady-State error to zero.
• Derivative Response: Causes the output to decrease if the process variable is increasing rapidly. Increasing the derivative time (T d ) parameter will cause the control system to react more strongly to changes in the error term and will increase the speed of the overall control system response.
• 9. PID Control for Pressure Loop
• error_term = setpoint- process_value
• p_term = kp * error_term
• d_term = kd * (error_term - prev_error_term)
• prev_error_term = error_term
• i_state = i_state + error_term
• i_term = ki * i_state
• output = p_term + i_term + d_term
PID closed loop system response
• 10. Simulation Result
• 11. Virtual Laboratory Design DAQ
• 12. LabVIEW G-Web Server
• G Web Server is a HTTP/1.0 compatible web server used to run applications on the web
• Its a stand alone VI
• Load and Run CGI VI
• Work with CGI applications to create documents whose content frequently changes and to process queries and form requests.
• Integrate with other Computers
• Work on different Platforms (LabVIEW Compatible Platforms)
• Implement Security; L imit access by directory or by VI name, Control access by the client address, the referring document, or through group and password files.
• 13. G-Web Server Test
• 14. Client End
• 15. G-Web Server with an Application
• 16. Client Side
• 17. Web Based Control in Industry Network (An Overview)
• 18. What do we use it for ?
• Towards Virtual Laboratories:
• Distance Learning for B.I.T. Extension Centers and B.I.T Mesra
• Feasibility Study:
• - Web based control in Medium/Small Scale Industry
• - Web based Supervisory Control and Data Acquisition (SCADA) using LabVIEW
• 19. THANK YOU Questions?