- #1
ylim
- 8
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Hi there,
I am reading this old journal and found this formulaes.
forces on the seismic mass, expressed in inertial reference coordinates, are given by Newton's law as
sum of force in x direction = m * x''
sum of force in y direction = m * y'' = Fy = mg
the equivalent acceleration of the accelerometer are
ax = -F/m = -x''
ay = -F/m = -y'' - g
i am rather concerned with the change in sign direction. i vaguely understand the concept of inertial and non inertial ref frame. but i don't know why it will cause a diff to the axial acceleration. hope to hear from someone.
I am reading this old journal and found this formulaes.
forces on the seismic mass, expressed in inertial reference coordinates, are given by Newton's law as
sum of force in x direction = m * x''
sum of force in y direction = m * y'' = Fy = mg
the equivalent acceleration of the accelerometer are
ax = -F/m = -x''
ay = -F/m = -y'' - g
i am rather concerned with the change in sign direction. i vaguely understand the concept of inertial and non inertial ref frame. but i don't know why it will cause a diff to the axial acceleration. hope to hear from someone.