Two stage mechanical oscillator, measurement framework

[PaoloGigli]

Ciao Andrea

I already have replay to you by PM

Paolo

[PaoloGigli]

One of interesting feature of proposed construction of TSMO (see the jpg in one of previous reply) is capability to control the length of pendulum and to pump a swing.

Main idea is here http://www.besslerwheel.com/wwwboard/messages/435.html
Further mathematical explanation (mathematical model) and visualization could be found here http://www.maplesoft.com/applications/view.aspx?SID=4888&view=html
And Master's Degree Thesis https://www.bth.se/fou/cuppsats.nsf/all/6bd3163040fa186ac12576e90049ad18/$file/BTH_AMT_EX_2010D01_SE.pdf with something different approach but with similar conclusions.

By pumping a swing it is possible to maintain the movement of a pendulum and introduce extra force needed to overcome losses and work on other side of a lever.

Paolo

[wings]

One of interesting feature of proposed construction of TSMO (see the jpg in one of previous reply) is capability to control the length of pendulum and to pump a swing.

Main idea is here http://www.besslerwheel.com/wwwboard/messages/435.html
Further mathematical explanation (mathematical model) and visualization could be found here http://www.maplesoft.com/applications/view.aspx?SID=4888&view=html
And Master's Degree Thesis https://www.bth.se/fou/cuppsats.nsf/all/6bd3163040fa186ac12576e90049ad18/$file/BTH_AMT_EX_2010D01_SE.pdf with something different approach but with similar conclusions.

By pumping a swing it is possible to maintain the movement of a pendulum and introduce extra force needed to overcome losses and work on other side of a lever.

Paolo

Paolo interessanti:
Nonlinear Oscillations, undamped and undriven pendulum
http://www.elmer.unibas.ch/pendulum/nonosc.htm
http://www.elmer.unibas.ch/pendulum/lab.htm

[PaoloGigli]

Hello wings,

Paolo interessanti:
Nonlinear Oscillations, undamped and undriven pendulum
http://www.elmer.unibas.ch/pendulum/nonosc.htm
http://www.elmer.unibas.ch/pendulum/lab.htm

Nice brain food. I did not have enough time for deeper insight in 1st. link math but I suppose it is usable for modeling movement with rigid form of pendulum rod. I'll do it over the next few days.

Thank you for contribution,

Paolo

[PaoloGigli]

For collecting data during experiment we need sensors, transducers, actuators and some kind of data acquisition unit.

Here is proposal for data acquisition unit, transducers and actuators:

Data collecting http://www.mikroe.com/pic/clicker/

Force transducer (dual) http://www.mikroe.com/click/adc/
Angle collecting http://www.mikroe.com/click/expand/
Acceleration measurement http://www.mikroe.com/click/accel/

Relay board http://www.mikroe.com/click/relay/
Step motor adapter board http://www.mikroe.com/click/adapter/
Step motor board http://www.mikroe.com/add-on-boards/various/bipolar-stepper-motor-driver/

Specification of boards connection http://www.mikroe.com/downloads/get/1737/mikrobus_specification.pdf

Edit: I am not a member of MikroE staff or connected in any way with MikroE except as customer (satisfied one  ).