EAS 140 Engineering Solutions Lecture #27 Lessons from the Case Studies

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Announcements n MAE Case Study - due today n Final: –information follows and will be posted on the web

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Announcements EAS 140 FINAL EXAM Date: Thursday December 16, 1999 Time: 11:45 am to 1:45 pm (90 min) Place: Last names A-D: 201 NSC Last names E-O: 20 Knox Last names P-Z: 112 Norton You will not be allowed to take the exam in the wrong room!!

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Announcements EAS 140 FINAL EXAM Material covered: 1. All material on disciplines, departments, case studies 2. Focus on material since the midterm (lectures including lecture, readings, and case studies - no lab material) 3. General questions about material in lectures 1-12

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Announcements EAS 140 FINAL EXAM Exam Format: 48 multiple choice questions, closed notes, closed book Bring: 1. Two #2 pencils WITH ERASERS 2. Your SUNY card - we will check ID no card, no exam 3. NO calculators, no notes, no books

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n What tools did the case studies involve? n CE and IE Engineering analysis approach, emphasizing: –model development –data acquisition –comparison of data to model remember errors can occur:

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions IDEA Hypothesis Model Mathematical Model Solution of Math. Model Design of Expts Execution of Expts Experimental Data Fit Model to Data Revise Model & Expts TRUTH Test Hypothesis            (invalid hypothesis) (incorrect model) (improper formulation) (incorrect solution) (wrong design) (improper execution) (incorrect interpretation) (invalid fit)  (inappropriate revision) (invalid hypothesis testing)  = problem

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n CIE Engineering analysis approach, emphasizing: –gather existing models –calculate parameters of interest also for EE: develop alternatives and recommend one Where can errors develop in these case studies?

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n EE Engineering design approach, emphasizing: –gather existing models –calculate parameters of interest –develop alternatives –recommend an alternative How did we evaluate feasibility in the EE case study?

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n EE continued –Emphasis was on technical feasibility –Remember that economic, fiscal, and social/environmental feasibility also important

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n MAE Engineering design approach, emphasizing: –hypothesis testing (will modification help?) –parametric study (vary one parameter at a time) What are the advantages and disadvantages of parametric studies?

Chemical  Civil  Computer  Industrial  Electrical  Mechanical EAS 140: Engineering Solutions Case Studies n MAE continued Parametric studies Advantage: can identify key parameters –disadvantage: may miss interactions between parameters (e.g., interactions between wing and tail design)