p02.docx - ME 360 \u2013 P02 Name 1 Use MATLAB \u201cfminsearch\u201d to design a helical compression spring for a coil-over shock absorber in a small unmanned

p02.docx - ME 360 u2013 P02 Name 1 Use MATLAB...

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ME 360 – P02Name _________________________1) Use MATLAB “fminsearch” to design a helical compression spring for a coil-over shock absorber in a small unmanned ground vehicle (UGV) based on the following specifications. Youmust attach hard copy of your code and MATLAB output.minimum weightmust fit over 0.57 inch DIA shock bodyminimum working force Fw= 15 lbf at working length Lw= 1.5 inchminimum factor of safety NFSof 1.0 to prevent static yield at shut length Ls(fully compressed)free length Lf= 3.0 inch, total number of coils Nt= 14round steel music wire or round zinc-plated steel music wiresquared (closed) ends or squared-and-ground endsCurrent design – Nt= 14, Lf= 3.0 in, OD = 0.80 in, d = 0.081 in, w = 0.046 lbf, NFS= 1.302) Select a spring that most closely matches your optimal design from McMaster-Carr.Optimal designMcMaster-Carrwire diameter d [in] ________________________________________coil OD [in]________________________________________total number of coils Nt14____________________free length Lf[in]3.0____________________weight [lbf]________________________________________coil ID [in]________________________________________spring rate k [lbf/in]________________________________________force at Lw[lbf] ________________________________________shut length L
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