Plotting velocity of a piston
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Hi everyone,
At the moment I'm trying to use MATLAB to plot velocity of a piston for an engineering report but I'm having trouble with my values. I have an equation for the velocity as a function of the angle of the crankshaft from vertical, and this is my code so far:
>> x=0:360; %0-360 deg rotation
>> b=asind(.0405*sin(x)/.13); the angle I need in my equatin, based on x
>> y=29.688*(sin(0+b))/(sin(90-b)); the equation of velocity of the piston
So for each value of x I have a value for b, but y only comes up with one value, rather than 361. I've been going through help files in MATLAB but to no avail. Can anyone guide me?
Thanks,
Mike
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Walter Roberson
on 4 Oct 2012
sin() operates on radians, but you are feeding it degrees. sind() is the degree equivalent.
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