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How Should Damping Characteristics Be Designed for a Plane Landing System?
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[QUOTE="Asim Riaz, post: 4969839, member: 537806"] [h2]Homework Statement [/h2] If an aeroplane of a mass of = 5000 with a velocity of ̇ = 500/ℎ has to land on a daily basis what would be your design characteristic of a damping system to absorb the ground energy contact within 5 seconds. Hint: Your answers may include: i. The values of k (the spring stiffness), C (the damping coefficient), Cc (the critical damping) etc. ii. Matlab code, graphs and comments to illustrate your solution.[h2]Homework Equations[/h2][h2]The Attempt at a Solution[/h2] as spring stiffness and damping ratio is not given in the question and I was told to keep changing the spring stiffness and damping ratio in MATLAB until you get a smooth curve, an oscillation which dies after 5 seconds. that is why i started with MATLAB, graph and coding is attached below. i am using unforced method, not sure if it is right or not, my only concern is damping ratio. which is 4.5 in this case. normally if damping ratio < 1 ... it is under damped. if equal to 1 than critical damped. bigger then 1 over damped.. in my case it is bigger that 1 so must be over damped but graph looks like critical damped. i tried this question with forced method as well. but i don't know how to calculate the force required[ATTACH=full]77455[/ATTACH] [ATTACH=full]77456[/ATTACH] few friends said F=kx, but i don't know how to calculate x in order to find F, [/QUOTE]
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How Should Damping Characteristics Be Designed for a Plane Landing System?
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