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bob012345

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- I need some help understanding this block diagram of an analog pendulum circuit. This circuit has a sine generator which complicates the diagram. I need help understanding what comes out of the integrators.

This is an analog circuit block diagram of a mathematical pendulum which solves the equation $$ \ddot{\alpha}= -\frac{g}{l}sin(\alpha)$$.

I need some help following the signals into and out of the blocks. I think the input to integrator #1 must be ##\frac{g}{l}sin(\alpha)## as well as ##\ddot{\alpha}## but what goes into and comes out of integrators #3 and #4? I'm planning on implementing this on The Analog Thing computer. The diagram below comes from Bernd Ulmann's book

https://the-analog-thing.org/

Thanks for any help!

I need some help following the signals into and out of the blocks. I think the input to integrator #1 must be ##\frac{g}{l}sin(\alpha)## as well as ##\ddot{\alpha}## but what goes into and comes out of integrators #3 and #4? I'm planning on implementing this on The Analog Thing computer. The diagram below comes from Bernd Ulmann's book

*Analog and Hybrid Computer Programming.*https://the-analog-thing.org/

Thanks for any help!