Systems Engineering Homework 2 Homework submission deadline:20:00,2014-May-11 Discussions with fellow students are encouraged.However,the homework must be completed and submitted on an individual basis.If two or more students submit identical homework solutions,each student will get only a fraction of the grade for this assignment. >Late policy:first late day will reduce your assignment grade by 50%.Additional days will reduce the entire homework grade to 0.If you have a special circumstance,please contact jianjun.gao@situ.edu.cn ahead of the submission deadline >Control the font size to 10 or 11. Question 1(10 points) The city 'Water Fall'has lot of internal lakes and rivers inside the city.The company AUTO wants to design a car which can be used on both land and in water for daily transportation.Suppose you are the systems engineer of this project.Use the Morphological Matrix to generate some solution for its functions,e.g.,How to support the car, Steering,Power,Stopping.Transmission,Moving.Please use you creativity to generate as many design as possible. Among all these solution choose one or two particular designs(a set of solution for these functions)and explain why you prefer these designs. Question 2(15 points) Lighting Problem:A large kitchen(15 ft long and 9-1/2 ft wide)in a house built in the late 1940s is quite dark at night, especially at the sink and the chopping board in front of the centrally located window.The slightly sloped cherry- paneled ceiling has an average height of 10 ft 9 in.and is traversed by a 14 in.by 6-in.wood-laminate beam supporting the flat roof immediately above.The walls are painted beige;the cabinets are metal-beige above the counter,brick red below.The countertop is beige,and the vinyl floor has a brown brick pattern.Table 1 lists the existing lighting fixtures.The fluorescent tubes lying on top of the cabinets are plugged into outlets above the cabinets (all on the same circuit)with switch at the kitchen entrances.All other fixtures are on individual switches.The spotlights over the sink are ugly and off target.The chrome triangular under-cabinet fixtures are quaint but have only a dim light output.All five plugged-in fluorescent tubes look cheap and are hard to clean,and the 2-ft tube is rarely if ever used
Systems Engineering Homework 2 Homework submission deadline: 20:00, 2014-May-11 Discussions with fellow students are encouraged. However, the homework must be completed and submitted on an individual basis. If two or more students submit identical homework solutions, each student will get only a fraction of the grade for this assignment. Late policy: first late day will reduce your assignment grade by 50%. Additional days will reduce the entire homework grade to 0. If you have a special circumstance, please contact jianjun.gao@sjtu.edu.cn ahead of the submission deadline. Control the font size to 10 or 11. Question 1 (10 points) The city ‘Water Fall’ has lot of internal lakes and rivers inside the city. The company AUTO wants to design a car which can be used on both land and in water for daily transportation. Suppose you are the systems engineer of this project. Use the Morphological Matrix to generate some solution for its functions, e.g., How to support the car, Steering, Power, Stopping, Transmission, Moving. Please use you creativity to generate as many design as possible. Among all these solution choose one or two particular designs (a set of solution for these functions) and explain why you prefer these designs. Question 2(15 points) Lighting Problem: A large kitchen (15 ft long and 9-1/2 ft wide) in a house built in the late 1940s is quite dark at night, especially at the sink and the chopping board in front of the centrally located window. The slightly sloped cherrypaneled ceiling has an average height of 10 ft 9 in. and is traversed by a 14 in. by 6-in. wood-laminate beam supporting the flat roof immediately above. The walls are painted beige; the cabinets are metal—beige above the counter, brick red below. The countertop is beige, and the vinyl floor has a brown brick pattern. Table 1 lists the existing lighting fixtures. The fluorescent tubes lying on top of the cabinets are plugged into outlets above the cabinets (all on the same circuit) with switch at the kitchen entrances. All other fixtures are on individual switches. The spotlights over the sink are ugly and off target. The chrome triangular under-cabinet fixtures are quaint but have only a dim light output. All five plugged-in fluorescent tubes look cheap and are hard to clean, and the 2-ft tube is rarely if ever used
Cook Beam Sink Table 1 Existing Kitchen Light Fixture Schedule ID Quantity Rating Type Fixhure Location y 4 20 watt 2-ft fluorescent triangular Under wall cabinets 4 40 watt 4-ft fluorescent tubes On top of cabinets 2 75 watt Incandescent spot in can 5 ft above sink D 20 watt 2-ft fluorescent tube Under microwave Problem Definition Statement Improve the general and task lighting in the kitchen shown on the sketch,while upgrading thelamp quality and matching or complementing the style of the lighting fixtures in the adjacent dining and living rooms,at reasonable cost and without remodeling the kitchen or covering up the beauty of the existing paneled ceiling. The concepts for improving the lighting in this kitchen are listed in Table 2.The criteria includes:1.Adequate sink task light;2.Other countertop lighting;3.General lighting;4.Light to ceiling;5.Energy efficient;6.Easy to clean;7.Easy bulb replacement;8.Allow deletion of tubes;9.Matching room styles 10.Attractive high-tech look 11.Low labor cost 12.Low materials cost Table 2 Options for Round 1 of the Kitchen Lighting Evaluation 1.Track Lighting-Install an 8-ft long track with 4 movable spots (250 watts each,black),to match existing track light in adjacent living room.Plug into outlet over cabinet near sink. 2.Sink Task Lighting-Replace the two spotlights over the sink with nicer-looking,more efficient,practical lamps. 3. Over-Cabinet Strip Lighting-Replace fluorescent tubes B with lighted strip along top of all wall cabinets. 4.Fluorescent Hanging Fixtures-Install two 4-ft fluorescent fixtures with efficient diffusers at 8- ft level (on chains,with wood surrounds)to replace tubes B;wire to main switch.Option explored with supplier. 5. Halogen Fixtures-Install two hanging halogen down-lights;wire to main switch;match chrome style of under-cabinet triangular fixtures.Option explored with supplier. 6.Brighter Surfaces-Paint walls white;install white vinyl flooring;install new white countertops;paint cherry panels in ceiling white. Use Pugh matrix to make your decision.(Please google the concept or product you are not familiar with)
Problem Definition Statement Improve the general and task lighting in the kitchen shown on the sketch, while upgrading thelamp quality and matching or complementing the style of the lighting fixtures in the adjacent dining and living rooms, at reasonable cost and without remodeling the kitchen or covering up the beauty of the existing paneled ceiling. The concepts for improving the lighting in this kitchen are listed in Table 2. The criteria includes: 1. Adequate sink task light; 2. Other countertop lighting; 3. General lighting; 4. Light to ceiling; 5. Energy efficient; 6. Easy to clean; 7. Easy bulb replacement; 8. Allow deletion of tubes; 9. Matching room styles 10. Attractive high-tech look 11. Low labor cost 12. Low materials cost Use Pugh matrix to make your decision. (Please google the concept or product you are not familiar with)
Question 3(30 points) Suppose you are going to buy a laptop.Your target is to find a laptop to fit your preference.You consider three class of criteria when you make the decision.The first class is the cost,which includes the buying costs(BC)and cost for maintenance(CM).The second class is the functional requirements,which include the stability,speed of processing(SP),expandability,appearance,weight.(Please add more of your own functional requirements).The third class is the service provided by the manufacture,which includes the number of service center and the quality of the service.Please make this question as a real one you are facing.List at least 5 kinds of lap-top as your candidates and use the Analytic Hierarchy Process to make the decision.You can use an excel file to record all the matrix and results. Question 4(25 points Suppose you are a systems engineer taking charge of designing renewable energy power plants.The power plants are built in mixed fashion,e.g.,it is a hybrid power plants with coal,solar thermal,biomass,wind,ocean,Hydro and Gas.You already got 30 design as the candidates.The criteria of the design includes building cost,Efficiency of energy(the larger the better), electricity cost,CO2 generations(the smaller the better),the area needed,and the time length for building. (a)Please identify the design that you will not consider in this list. (b)Please identify the design you will consider in the future. Hints:dominated and non-dominated solution.Pareto Optimal. Design No. Building cost Efficiency Elec-cost C02 Area Time 1 19341 52 152 1.78 9.78 5.19 2 10945 131 80 1.57 7.02 3.52 3 8152 74 43 1.70 5.42 4.72 15347 124 101 1.74 11.71 2.37 5 7681 88 94 0.90 3.41 3.80 6 11655 107 73 0.88 7.38 5.02 7 6676 148 53 1.58 12.66 2.71 8 9454 103 60 1.14 2.64 2.99 9 16588 149 54 2.91 2.76 8.61 10 14125 43 64 1.21 8.08 1.90 11 20423 104 181 1.47 3.65 3.15 12 13248 144 154 1.17 7.63 3.51 13 11554 78 113 1.55 3.14 5.64 14 22665 179 102 1.35 8.04 6.48 15 10162 44 51 1.30 4.02 3.11 16 8619 52 229 0.61 6.29 3.47 17 10261 68 80 1.53 12.19 2.04 18 9405 63 46 1.45 7.27 6.49 19 19580 80 61 1.69 9.01 1.97 20 6480 63 93 2.37 3.97 7.91 21 14801 113 128 1.28 10.33 4.67 22 15728 115 136 1.39 4.88 2.35
Question 3(30 points) Suppose you are going to buy a laptop. Your target is to find a laptop to fit your preference. You consider three class of criteria when you make the decision. The first class is the cost, which includes the buying costs (BC) and cost for maintenance (CM). The second class is the functional requirements, which include the stability, speed of processing(SP), expandability, appearance, weight.(Please add more of your own functional requirements). The third class is the service provided by the manufacture, which includes the number of service center and the quality of the service. Please make this question as a real one you are facing. List at least 5 kinds of lap-top as your candidates and use the Analytic Hierarchy Process to make the decision. You can use an excel file to record all the matrix and results. Question 4(25 points ) Suppose you are a systems engineer taking charge of designing renewable energy power plants. The power plants are built in mixed fashion, e.g., it is a hybrid power plants with coal, solar thermal, biomass, wind, ocean, Hydro and Gas. You already got 30 design as the candidates. The criteria of the design includes building cost, Efficiency of energy(the larger the better), electricity cost, CO2 generations(the smaller the better), the area needed, and the time length for building. (a) Please identify the design that you will not consider in this list. (b) Please identify the design you will consider in the future. Hints: dominated and non-dominated solution. Pareto Optimal. Design No. Building cost Efficiency Elec-cost CO2 Area Time 1 19341 52 152 1.78 9.78 5.19 2 10945 131 80 1.57 7.02 3.52 3 8152 74 43 1.70 5.42 4.72 4 15347 124 101 1.74 11.71 2.37 5 7681 88 94 0.90 3.41 3.80 6 11655 107 73 0.88 7.38 5.02 7 6676 148 53 1.58 12.66 2.71 8 9454 103 60 1.14 2.64 2.99 9 16588 149 54 2.91 2.76 8.61 10 14125 43 64 1.21 8.08 1.90 11 20423 104 181 1.47 3.65 3.15 12 13248 144 154 1.17 7.63 3.51 13 11554 78 113 1.55 3.14 5.64 14 22665 179 102 1.35 8.04 6.48 15 10162 44 51 1.30 4.02 3.11 16 8619 52 229 0.61 6.29 3.47 17 10261 68 80 1.53 12.19 2.04 18 9405 63 46 1.45 7.27 6.49 19 19580 80 61 1.69 9.01 1.97 20 6480 63 93 2.37 3.97 7.91 21 14801 113 128 1.28 10.33 4.67 22 15728 115 136 1.39 4.88 2.35
23 8518 198 66 0.82 7.47 4.70 24 10782 172 67 1.40 4.93 4.35 25 17627 90 134 0.75 12.06 3.73 26 11803 94 62 0.79 8.61 2.30 27 15044 51 86 0.64 3.65 4.94 28 5850 106 50 1.98 4.76 4.16 29 14525 50 65 1.46 10.27 2.39 30 8289 66 143 2.13 5.13 7.33 Question 5(20 points) Please read the paper 'UNDERSTANDING THE ORBITAL TRANSFER VEHICLE TRADE SPACE'carefully and write down a brief summary of this paper.(e.g.,what is the design problem,what method is used,which attributes are used for utility function, what is the main results...).Your summary should have at least 500 words.The paper has been uploaded on our course website
23 8518 198 66 0.82 7.47 4.70 24 10782 172 67 1.40 4.93 4.35 25 17627 90 134 0.75 12.06 3.73 26 11803 94 62 0.79 8.61 2.30 27 15044 51 86 0.64 3.65 4.94 28 5850 106 50 1.98 4.76 4.16 29 14525 50 65 1.46 10.27 2.39 30 8289 66 143 2.13 5.13 7.33 Question 5 (20 points) Please read the paper `UNDERSTANDING THE ORBITAL TRANSFER VEHICLE TRADE SPACE’ carefully and write down a brief summary of this paper. (e.g., what is the design problem, what method is used, which attributes are used for utility function, what is the main results…). Your summary should have at least 500 words. The paper has been uploaded on our course website