Re: R/C Gyro question

[D Sieja <oct0gen-at-yahoo.com>]

doubt it.  rc gyros are probably not going to be able to hold the dish to the precision required by a "direct tv" type dish as all mechanical gyros drift over time.  a laser ring gyro may be precise enough over a few hours but the cost will get ya on that one.  probably the best way to do it is a differental comparitor on the signal strength similar to what solar panels use to stay pointing at the sun. in the case of solar panels, there are two light sensors slightly off axis to either side of an imaginary line that is perpindicular the front of the cell.  the comparitor monitors the two sensor and if they are both receiving the same amount of light, the solar cell is pointed directly at the sun.  as the sun moves one sensor will begin to receive more light and the other less.  the comparitor will notice the difference and tell motor drivers to move the cell in the directon of the sensor receiving more light until both sensors are receiving equal light again. 

 

Steve Tyng <stevet-at-stcharlesmd.com> wrote:

> Any R/C copter pilots out there?
>
> I have a question regarding gyros. Could a heading-hold gyro along with a servo modified for continuous rotation be used to hold a platform pointing in the same direction it was initially set? The application is for a satellite TV antenna installation on a mobile platform (a moored boat). Would there be drift issues?
>
> Steve Tyng

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