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R&D (Roberts Linkage)
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KoheiMitsuhashi - 16:26, Sunday 02 April 2023 (3207)Get code to link to this report
Try to transfer function of Roberts linkages.

What I did: measure transfer function of Roberts linkages.
 

I measured transfer function of Roberts linkages.
I attacehd two transfer function.
Resonant frequency are set at 1.5Hz(Fig 1, 2) and around 0.5Hz(Fig 3, 4) respectively.
The set up of these experiments are also attached.

The experiment whose resonant frequency is set at 1.5Hz probably have peak at 1.5Hz(Fig 1).

The peak on experiment whose resonant frequency is set around 0.5Hz is 3Hz(Fig 3). This peak is yaw motion.
The reason that I didn't measure transfer function surrounding resonant frequency is the range of photo sensor.
I realized that when I measure the transfer function, I need to measure mutiple time.
 

What I will do: I will remeasure the transfer function whose resonat frequency is set around 0.5Hz.

Images attached to this report
3207_20230402084316_20230331trafromacctophoto220230331194142screenshot.png 3207_20230402084804_20230331183441.jpg 3207_20230402084842_20230331trafromacctophoto320230331221306screenshot.png 3207_20230402085529_20230402155344.jpg
Comments related to this report
KoheiMitsuhashi - 10:19, Monday 03 April 2023 (3209)

I remeasured the transfer function whose resonant frequency is set around 0.5Hz.
I measured it from 2Hz to 0.1Hz.
The peak of resonant looks like 0.4Hz.

This time, peak of resonant is crushed by range of photo sensor.
When I measured it around resonant frequency, displacement is bigger than linear range of photo sensor.