Introduction - ME 375 Dynamic System Modeling and Analysis...

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Unformatted text preview: ME 375 Dynamic System Modeling and Analysis Prof. Peter Meckl School of Mechanical Engineering Purdue University ME375 Intro - 1 Why this course? Fuel Injector From: Diesel-Engine Management, 4th Edition, Robert Bosch GmbH, 2005. School of Mechanical Engineering Purdue University ME375 Intro - 2 1 Why this course? Fuel injector pulse timing: Current command to Injector te tm θe θm TDC Crank Angle Question: how closely can the pulses be spaced? School of Mechanical Engineering Purdue University ME375 Intro - 3 Course Objectives 1) Introduce systematic and unified modeling of lumped dynamic systems using first principles. 2) Provide mathematical tools for analysis and performance prediction of engineered systems. 3) Provide introduction to design of feedback controllers to achieve closed-loop stability and specified system performance. School of Mechanical Engineering Purdue University ME375 Intro - 4 2 Course Overview • Integrating Modeling, Analysis and Control of Machines and Physical Systems • Multi-Energy Domain System Modeling • Standard Format and Procedure • System Analysis (in time and frequency domains) • Feedback Control School of Mechanical Engineering Purdue University ME375 Intro - 5 Course Overview • Text – System Dynamics, by Palm available via CourseSmart on-line: http://www.coursesmart.com/ onhttp://www.coursesmart.com/ • References - see syllabus • Homework - must be individual effort • Matlab - necessary to complete homework • Exams - two midterm exams and one final • Grading - see syllabus • Course Web site: http://www.itap.purdue.edu/tlt/blackboard/index.cfm http://www.itap.purdue.edu/tlt/blackboard/index.cfm login using Career Account username and password, then select ME 375 School of Mechanical Engineering Purdue University ME375 Intro - 6 3 What is a Model? • • • • • A set of assumptions? A diagram? A set of equations? A set of plots? A simulation? School of Mechanical Engineering Purdue University ME375 Intro - 7 Why do we need a Model? • To ensure reliable performance • To prevent failures • To apply feedback control School of Mechanical Engineering Purdue University ME375 Intro - 8 4 Example • Blood Sampler (Lancet) School of Mechanical Engineering Purdue University ME375 Intro - 9 System Characteristics • • • • • Simple vs. Complex Lumped vs. Distributed Linear vs. Nonlinear Time-invariant vs. Time-varying Continuous vs. Discrete School of Mechanical Engineering Purdue University ME375 Intro - 10 5 Dynamic Systems • Models are the same regardless of the physical domain: = y = Charge u=e = = y = Pressure dq u= dt y = Transl. displ. y = Angular displ. u= f u =τ y + y + y = u(t) • We only have to understand one model, but we have four different systems! School of Mechanical Engineering Purdue University ME375 Intro - 11 Course Outline Introduction Components/ elements Connections/ interconnects Mechanical Thermal Electrical Hydraulic Electromech. Input/output vs. state-variable models Time-frequency tools of system analysis Feedback system design School of Mechanical Engineering Purdue University ME375 Intro - 12 6 ...
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This note was uploaded on 12/17/2009 for the course IE 383 taught by Professor Leyla,o during the Spring '08 term at Purdue University.

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