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Sharing of Control Teaching - 1 Session at Control 2008 © Dr Richard Mitchell 2008 On Teaching of Control in UK Led by Dr Richard Mitchell Cybernetics, School of Systems Engineering University of Reading, UK R.J.Mitchell@reading.ac.uk
Sharing of Control Teaching - 2 Session at Control 2008 © Dr Richard Mitchell 2008 Background At Control 2006 a session was organised led by Anthony Rossiter (Sheffield) and Derek Atherton (Sussex) about the teaching of Control in UK Universities This useful discussion led to an application for funding from HEA for a Special Interest Group to look at Control Curricula and to consider how ideas, methods, labs, etc could be shared. Addresses problem that in UK we tend to write own materials – there is poor record at sharing There is much on the WWW, but no quality control. Aim of SIG.. Bring people together, develop embryonic web site for sharing of control … have annual meetings
Sharing of Control Teaching - 3 Session at Control 2008 © Dr Richard Mitchell 2008 SIG First Meeting : Reading 2007 Syllabi of Control Courses considered Much commonality (with different packaging) Most first courses included signals and systems with analysis by Laplace Most second courses covered the analysis of control systems with different control strategies Subsequent courses vary – depends on research interests Web site produced, mainly aimed at second courses – some lecture-type material and case studies – some MATLAB code – examples which work with SISOTOOL Questionnaire sent out to Control academics
Sharing of Control Teaching - 4 Session at Control 2008 © Dr Richard Mitchell 2008 Second Meeting Glasgow 2007 Looked at syllabi in more detail wondered about third courses, PID, non-linear Analysed questionnaire Wondered how to maintain web site in longer term Agreed to have a meeting at Control 2008 Noted IFAC have a similar initiative (but UK may have different perspective)
Sharing of Control Teaching - 5 Session at Control 2008 © Dr Richard Mitchell 2008 Subsequently Meeting co-organised with the IEEE Control Systems Chapter, Sheffield, April 2008 9 Presentations Discussion -> Agreed to arrange Todays session Paper at IFAC World Congress Typical control curricula and using software for teaching/assessment: a UK perspective J.A Rossiter, D. Giaouris, R.J. Mitchell, P. McKenna IFAC Initiative – IFAC Control Resources ICR kick started by session at IFAC
Sharing of Control Teaching - 6 Session at Control 2008 © Dr Richard Mitchell 2008 http://controleducation.group.shef.ac.uk/ Summary of aims and objectives Typical curriculae Minutes of meetings and membership Resources page Questionnaire Comments on curriculae and assessing with MATLAB March 19th 2008 meeting March 19th 2008 meeting and presentations and discussions presentations and discussions ICR initiative of IFAC Network for new academics in controlNetwork for new academics in control and websitewebsite Details of sharing event at IFAC world congress 2008
Sharing of Control Teaching - 7 Session at Control 2008 © Dr Richard Mitchell 2008 Workshop Apr 2008 Using jet stream data to support modelling and simulation with MATLAB and simulink Alastair Cooke Cranfield. Modelling the Eye-Brain-Hand Motor Response in Transfer Function form: An Active Learner Approach Aidan O'Dwyer Dublin Inst Tech Internet Based Real-time Control System Laboratory Guoping Liu, Wenshan Hu, Senchun Chai and David Rees, Glamorgan Modelling Project at Reading Richard Mitchell Will Browne, Reading Experiences at teaching advanced control at Reading using Matlab based computer assessment Victor M. Becerra, Reading
Sharing of Control Teaching - 8 Session at Control 2008 © Dr Richard Mitchell 2008 Continued Bode plots, why bother?Paul McKenna, Glasgow Cal Using peer assessment and MATLAB within the control curriculum and for large groups Anthony Rossiter Sheffield Experiences of using MATLAB for teaching and assessment Damian Giaouris, Newcastle Graduate Process Control Skill Requirements – Are we satisfying them? Diane Rossiter, Sheffield The special interest group on control education and its future (Discussion)
Sharing of Control Teaching - 9 Session at Control 2008 © Dr Richard Mitchell 2008 IFAC Control Resource ICR Aim : gradually generate a reputable control systems data base, one-stop internet shopping point providing quality response to web based enquiries about control systems, their underpinning theories and applications. The ICR will: serve future teaching and research needs of the community members; stimulate increased interest in control among young minds, students and young researchers. maintain vitality of IFAC efforts in a manner attractive to current members and new generation.
Sharing of Control Teaching - 10 Session at Control 2008 © Dr Richard Mitchell 2008 Information on ICR Details on ICR at IFAC World Congress – or SIG page http://controleducation.group.shef.ac.uk Overview at /ifac2008.htm More details at /ifac2008b.htm Presenters at session in Korea /ifac2008_presenters.htm These were from Germany, France, Spain, UK, Netherlands, India, USA, Australia
Sharing of Control Teaching - 11 Session at Control 2008 © Dr Richard Mitchell 2008 Network New Academics in Control http://www.newace.org.uk/ EPSRC Funded … from Oct 2007 Objectives: to provide a platform for the members to exchange ideas, experience and practices to develop and strengthen long-term collaboration activities, including joint applications and collaborations with industry to support potential future leaders in control engineering and related areas to develop and sustain a strong future for control engineering in the UK
Sharing of Control Teaching - 12 Session at Control 2008 © Dr Richard Mitchell 2008 Some Material from Anthonys Talk Typical control curricula and using software for teaching/assessment: a UK perspective By J.A Rossiter, D. Giaouris, R.J. Mitchell, P. McKenna 1.Background to SIG 2.Aims and objectives (already covered here) 3.Curriculae 4.Software 5.Conclusions
Sharing of Control Teaching - 13 Session at Control 2008 © Dr Richard Mitchell 2008 Background UK context Rapid increase in profile of teaching and learning Some universities trying to reintroduce formal recognition of teaching contributions International context Rapid growth in potential of technology. Web allows for sharing best practice. EDCOM (IFAC education TC) asked to look at a repository of control resources. Global adoption of tools such as MATLAB/SIMULINK UK has some unique characteristics, hence SIG
Sharing of Control Teaching - 14 Session at Control 2008 © Dr Richard Mitchell 2008 Curriculae Typical UK First course in control Tends to cover core maths and thus might be called Signals and Systems. It covers Laplace transforms, transfer functions, poles and zeros, system responses, damping and resonance, basic block diagrams, Fourier series and transforms, Introduction to feedback (no analysis), Modelling and dynamics. NOTE no state space
Sharing of Control Teaching - 15 Session at Control 2008 © Dr Richard Mitchell 2008 Curricula – Second Course Typical Second Course – prob no design + labs (simulate?) Why feedback? Open and closed-loop, block diagrams, 2nd order systems (damping, overshoot,...). Steady-state errors, the effect of disturbances, position of the integrator in the loop, Poles, zeros stability, characteristic eqn and root loci, Frequency response, Bode, Nyquist, gain/phase margins, Lead and lag compensators, PID. Velocity feedback. Routh-Hurwitz, Nichols charts, Zeigler Nichols are still in many syllabi BUT de-emphasised or phased out.
Sharing of Control Teaching - 16 Session at Control 2008 © Dr Richard Mitchell 2008 Remarks/notable omissions Less emphasis on sensitivity and thus fundamental arguments as to why control is important. No need for students to do design (lead, lag, PID, root- loci and pole-placement) No digital control, state-space, Kalman filters, No sensitivity (noise and disturbance rejection) and robustness, No feed forward, relevance or significance of zeros, PLCs, measurement (sensors and transducers) and time delays.
Sharing of Control Teaching - 17 Session at Control 2008 © Dr Richard Mitchell 2008 Industrial perspective The industrial view point collected via a small survey was very close to the academic one. the emphasis is on deep understanding of, and the ability to use, basic traditional concepts rather than the need to be broad. No demand for introducing state space into first course Or for a greater emphasis on loop sensitivity at this level. Some Details : PID must be taught (as commonly used), Also Fourier – helps re signals Great value in Bode/Nyquist
Sharing of Control Teaching - 18 Session at Control 2008 © Dr Richard Mitchell 2008 Using software for learning/assessment Software be used actively for teaching and assessment. Many methods of 30 years ago assume paper and pen. Students must understand how to sketch Bode/Nyquist/ root-loci, but less concern for numerical details. Using software, can put more emphasis on interpretation and design Use interactive software to illustrate key points. Do only necessary computations by hand (saves time). Balance assessment between traditional exams and software laboratory. Logical to base around MATLAB and sisotool
Sharing of Control Teaching - 19 Session at Control 2008 © Dr Richard Mitchell 2008 Some Case Studies Open ended coursework with real industrial data Students must understand before use computers 30:70 split coursework/exams. Labs must include real systems (we use QUANSAR) not just simulation MATLAB assessment popular (can take time to set up – invigilators must know MATLAB Check exam equations using Control Kit Students positive on lab assessments; they must prepare before hand; get them to keep a log – sketch graphs New module: how an engineer would use various methods Exams – partly use computer, partly write answers
Sharing of Control Teaching - 20 Session at Control 2008 © Dr Richard Mitchell 2008 Conclusions General agreement within the UK about topics covered during introductory control modules. Excludes several topics, e.g. robustness/state space. Routh / Nichols charts, are being dropped. A significant move towards using software, specifically MATLAB/SIMULINK, for teaching and assessment. Student feedback indicates students more confident in basic principles and thus potentially ready to re- engage with the topic later in their studies. Some minor conclusions on best practise in using computer based assessment seem to be widely shared.
Sharing of Control Teaching - 21 Session at Control 2008 © Dr Richard Mitchell 2008 Discussion Items Developing the existing web site further Suggestions for other resources which could be added to the site Can we better evaluate some material that is available, on the internet for instance, to help lecturers developing new courses. Potential further events (such as that held at Sheffield in April 2008) for sharing ideas on Control Teaching Any other comments
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