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Virtual Laboratories

Yashar Baradaranshokouhi. Virtual Laboratories. Department of Automatic Control & System Engineering The University of Sheffield. Virtual Laboratory Leader: Dr. Anthony Rossiter. Blended Learning Package. To Achieve a better learning experience better: Lectures Tutorials Computer Labs

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Virtual Laboratories

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  1. YasharBaradaranshokouhi Virtual Laboratories Department of Automatic Control & System Engineering The University of Sheffield Virtual Laboratory Leader: Dr. Anthony Rossiter

  2. Blended Learning Package To Achieve a better learning experience better: • Lectures • Tutorials • Computer Labs • Equipment • Difficulties: • Time Slots • Cost • Space

  3. A Quick Introduction: A Solution to: • Limited resources and equipment • 24/7 accessible for students • Limited time of academic staff and technicians • Authentic learning and student motivation. • Students have time to reflect and redo activities. Two Main Types: • SVL (Soft Virtual Laboratories) • HVL (Hard Virtual Laboratories)

  4. Design: Challenges & Solutions • Not all of the experiments can be transformed into the virtual environment • Database Integration • IGUI: Interactive Graphical User Interface design • Unexpected errors and crashes while running the experiment remotely • Maintenance • Automatic Recovery system • Fixed station for the equipment

  5. Design: Challenges & Solutions Considering the students feedback, two different approaches has been considered • 1) Complex Design (DC Servo Motor) • Includes: • Tab based (4 tabs) • Interactive user interface • Interconnected experiments • Database connectivity • Log-in feature • 2) Simple Design (PID Controller) • Only one tab • Straight forward load & run

  6. Laboratory: DC Servo Motor • First Order Modelling • Calculating the gain (K) • Calculating the time constant (T) • Building a first order transfer function • Analysis of first order step response

  7. Experiment 1: Gain Measurement

  8. Experiment 2: Time Constant Calculation

  9. Experiment 3: System Transfer Function

  10. Email, Save and Submission Page

  11. Features: • Database Integration • IGUI: Interactive Graphical User Interface • Security Check • Online User Queuing System • Live View of the Laboratory • Time limitations • Robust and automatic recovery system

  12. Laboratory 2: PID Controller • Hands on Experience with a PID Controller • PI: Proportional Integral controller • PD: Proportional Derivative controller • PID controller • System response analysis at set point (Step Response)

  13. Features: • Simple Design • Online User Queuing System • Time Limitation • Real Time Live View of the system step response • Robust and easy recovery

  14. Laboratory 2: PID Controller

  15. Student Feedback and Evaluation • Reliability is fundamental. Students expect the system to work if engagement is encouraged or compulsory. • Lighting: Does the webcam work at night? • Automatic restart: For what scenarios can the system crash and how quickly is this noticed and rectified? • Simplicity of instructions and interface. • Queuing: The queue length should be visible or have a formal booking system.

  16. Conclusions • Students projects have been designed and supervised to build up laboratories for students • Students feedback has been effectively considered. • Laboratories has been available for students 24/7 • Virtual Laboratories can play an important role in learning and teaching.

  17. Thanks to • Dr. Anthony Rossiter • Dr. Ian Lilley • Mr. Ian Hammond • Department of Automatic Control & System Engineering

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