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Math Help - find coeeficients in differential equation

  1. #1
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    find coeeficients in differential equation

    I am good at Matlab programming but over here I am stuck in the maths of the problem, I am dealing with the differential equation of spring mass system
    mx’’+cx’+kx=0
    where x’’=dx2/dt2 and x’=dx/dt. I have the values of mass and I also have the array of time and x i.e x is given for a particular value of time so I can find x’’ and x ‘ easily. I am stuck at what method to apply to find the value of c and k. I can program any method but have searched several books but didn’t get how to find c and k. If I get to know the method I can program it easily.
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  2. #2
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    Re: find coeeficients in differential equation

    This is, you say, a "mass-spring system" so k is the "spring constant" and c is the "coefficient of friction" (which should be negative since friction will act against velocity).
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  3. #3
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    Re: find coeeficients in differential equation

    thanks
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