Experiment with Undergraduate Education

Transcription

1 1 How to Integrate Remote Experiment with Undergraduate Education G. Song oratory University of Houston Houston, TX, USA 1

2 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 2 Outline 1. Introduction 2. System Architecture 2.1 Web Server 2.2 Building Remote Experiment: LabVIEW 3. Currently Available Remote Control Experiments at UH 3.1 Smart Vibration Platform (SVP) 3.2 Smart Vibrating Beam (SVB) 3.3 Shape Memory Alloy (SMA) Experiment 4. Integration with Undergraduate Education 4.1 Remote In-classroom Demonstration 4.2 Remote Hands-on Experiments 5. Conclusion 2

3 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 3 1. Introduction Ambrose et al In class demonstration increase the effectiveness of student learning Corter et al. 2004, Furman et al. 2002, Lundgren et al. 2006, Nedic et al Identified advantages of remote laboratories. Felder et al Importance of teaching to Visual Learners. Aktan et al Reform the Civil Engineering education (Protective Mechanism of infrastructure for homeland security) 3

4 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 4 1. Introduction (cont) Current Online Remote Experiments Stanford CyberLab b Laser Diode Test (NI LabVIEW) Swiss Federal Institute of Technologies Online Mechanical System Testing (NI LabVIEW) Dalhousie University 10 Remote Experiment Using Laser Diodes (NI LabVIEW) Guzman et al Web-based remote control laboratory using a greenhouse scale model Zhang et al NetLab Most focus on simple experiments and no data recording 4

5 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 5 1. Introduction (cont) Development of an Online Experiment Farm connected through the Internet allowing students and researchers to connect and share worldwide online experiments Easy to implement for instructors and researchers with limited i technical knowledge in Internet remote experiment control Globally accessible by students and researchers with different languages and software 5

6 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 6 2. System Architecture Web Server Computer With DAQ Experiment Sensors Actuators Internet Network Camera - Internet User schedule experiment time on Web Server - Internet User wait until it is his/her turn - Web Server provides access to the LabVIEW Program - Internet User access LabVIEW to control experiment for the allotted time slot 6

7 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 7 2. System Architecture (cont) Remote Experiment Engine (REE) LabVIEW, Matlab, Java Applets, Flash, etc. REE must be located at the remote site Users connect directly to REE but users needs to be authorized by Web Server to run the experiment Sample Authorization Technique REE ask web server for scheduled user identification (If any) User ID, Experiment ID, Name, Time of Experiment If data as been verified run experiment, otherwise close connection REE use Time of Experiment to run a countdown of the Time Slot. When time is over, user will be disconnected by REE Sample Data File Collection REE collect the experiment data locally REE send the data file every end of the data collection to Web Server Web Server save data file and send back an Acknowledgement 7

8 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 8 21WebServer 2.1 Open Source software (Linux, Apache, PHP, MySQL) 8

9 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 9

10 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 10

11 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 11

12 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 12

13 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 13

14 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Web Server (cont) 14

15 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Building Remote Experiment: LabVIEW Sample Authorization for LabVIEW HTTP Connection Verification of Scheduled User Information 15

16 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Building Remote Experiment: LabVIEW (cont) Sample Data File Collection for LabVIEW Data is saved as text file locally using Time to Target technique (Set number of seconds) After data is saved, REE send request to Web Server to download the file from the temporary directory using TCP/IP HTTP connection. After receiving the Acknowledgment from the Web Server, REE delete the file Delete Data File HTTP Connection Save Data File VI 16

17 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 17 Building Remote Experiment : Java Micro-controller based Java Applet REE 1. Micro-controller authenticate ti t user 2. Client Computer download Java Applet from micro-controller 3. After the Java Applet starts on the client computer, the Applet exchanges data with the micro-controller 4. Micro-controller saves data locally and send it to Web Server 2,3 Experiment uc Client 1,4 Web Scheduler 17

18 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Currently Available Remote Control Experiments at UH 3.1 Smart Vibration Platform (SVP) Remote Control of Smart Vibration Platform Computer, USB DAQ, Web Camera 18

19 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 19 Remote Control of SVP Using LabVIEW Data Acquisition Systems Computer LabVIEW USB DAQ Experiment Sensors Actuators Internet Network Camera Client 19

20 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 20 Mechanical Architecture Design of the SVP Simulate a 1 story building subject to vibration Motor Low Natural Frequency 1 st Mode only SMA Wires MR Damper PZT Patch Frame with attached SMA wires. 20

21 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 21 Design of the SVP Motor with mass imbalance Steel Tongue Safety cage Steel Frame SMA brace MR Damper Electromagnet Base Mode switch LCD display Manual control buttons Analog inputs/outputs 21

22 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 22 Testing of the SVP Educational Tool Hands on Experiments 1. Onset Resonance: MOTOR SMA MR 2. Effect of Damping Ratio on Resonance Frequency (Structural Vibration Damping using MR Damper) MOTOR SMA MR 3. Effect of System Stiffness on Resonance Frequency y( (Vibration damping by Actively Tuning System Stiffness) MOTOR SMA MR 22

23 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 23 Testing of the SVP 23

24 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Smart Vibration Beam (SVB) Remote Control of Smart Vibrating Beam Computer, PCI DAQ, Web Camera 24

25 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 25 Remote Control of SVB Using LabVIEW Data Acquisition Systems High Voltage Amplifier Computer LabVIEW PCI DAQ Experiment Sensors Actuators Internet Network Camera Client 25

26 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 26 Remote Control of SVB PPF Control High Voltage Amplifier PZT Actuator Beam PZT Sensor Positive Position Feedback 26

27 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 27 Remote Control of SVB System Identification 27

28 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Shape Memory Alloy (SMA) Experiment Remote Control of Shape Memory Alloy Experiment Computer, Web bcamera 28

29 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 29 Remote Control of SMA Using LabVIEW Data Acquisition Systems Serial Programmable Power Supply Computer LabVIEW Serial uc Experiment Sensors Actuators Internet Network Camera 29

30 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 30 Remote Control of SMA Results of 1/60 Hz Sinusoidal Excitation 30

31 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Integration with Undergraduate Education 4.1 Remote In-Classroom Demonstration 31

32 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 32 Remote demonstration of the SVP in Control System Design and Analysis, ME, UH 32

33 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 33 Remote Demonstration of SVP in Earthquake Engineering, Civil Engr, UH 33

34 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 34 Remote Demonstration at PVAMU 34

35 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 35 On site vs Remote Demonstrations Comparative Studies The Smart Vibration Platform in both on-site (face-to-face) and remote modes are integrated into the teaching of several courses in several collaborating universities. It is found in general that both the on-site and the remote SVP experiments are effective in improving student learning experience. The remote hands-on experiment provides an economic, but effective, approach to improve student s learning via interaction with real experiments. The remote hands-on experiments, which otherwise may not be available to students, improves student learning, as reflected in anonymous students surveys. 35

36 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 36 On site vs Remote Demonstrations (Control System Laboratory, ECE, UH) Question Onsite Smart Vibration Platform (SVP) Very effective Effective Table Control System Laboratory (UH ECE) somewhat effective Not effective Question Remote Smart Vibration Platform (RSVP) Very effective Effective Somewhat effective Not effective % of total 59.87% 32.29% 29% 7.21% 0.63% 55.70% 32.07% 11.60% 063% 0.63% responses 36

37 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 37 On site vs Remote Demonstrations (Intelligent t Structure t Systems, ME, UH) Table Intelligent structure systems (UH ME) Onsite Smart Vibration Platform (SVP) Remote Smart Vibration Platform (RSVP) Question Very effective Effective % of total responses somewhat Somewhat effective Not effective Question Very effective Effective effective Not effective % 32.61% 17.39% 2.61% 44.09% 32.62% 19.00% 4.30% 37

38 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 38 On site vs Remote Demonstrations (Control System Design Analysis, ME, UH) Onsite Smart Vibration Platform (SVP) Question Very effective Effective Table Control System Design Analysis (UH ME) somewhat effective Not effective Question Very effective Effective Remote Smart Vibration Platform (RSVP) Somewhat effective Not effective % of total 44.29% 42.14% 12.14% 14% 1.43% 41.63% 42.49% 49% 14.59% 129% 1.29% responses 38

39 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM Remote Hands-on Experiment This remote technology has the functions of user login and verification, a real-time video feed, online adjustment of experiment parameters and controllers, a real-time data feed, data saving, experiment safety protection, and security. All these functions make it possible to implement remote experiments in a course as a hands-on tool. With this module, a single experiment setup is now available 24/7 for students to conduct hands on experiments via internet. This remote experiment is available to anyone who makes a request and a user name and password will be set up for the user. 39

40 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 40 Integration with Teaching of Intelligent Structural Systems In Spring 07, Summer 07, Fall 07, Summer 08, Summer,09, Dr. Song, with support from his group, has successfully integrated remote hands-on experiments in his teaching of the course entitled, Intelligent Structural Systems (MECE 5388 and 6387), a dual level course at UH. More than a total of 130 students conducted the experiments online and completed the required reports. Prior to this remote experiment, there were no hands-on experiments available to students who take MECE 5388 and 6387 due to budget and space limitations. The remote hands-on experiment provides an economic, but effective, approach to improve students learning via the interaction with real experiments. 40

41 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 41 Example 1 Please see the exhibition of the remote hands-on homework (word file) 41

42 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 42 Example 2 Please see the exhibition of the remote hands-on homework (word file) 42

43 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 43 Example 3 Please see the exhibition of the remote hands-on homework (word file) 43

44 INTERNET REMOTE CONTROLLED EXPERIMENT SYSTEM 44 A LabVIEW Template has been designed to facilitate the integration of experiments on the Internet. Additional Templates will be made available in the future. Currently 3 online experiments demonstrate the remote control capabilities. Surveys shows that this tool is effective ec in delivering the intended material to students. Conclusion 44