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How to Mount a Gyro
Okay... So we understand how the gyro works but we are having trouble figuring out where to mount it and how to mount it. If anyone can provide a detailed description and pictures possibly that would be wonderful. Thanks in advance!
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Re: How to Mount a Gyro
If you are trying to measure the angle of the robot you are going to want to mount it closest to the middle of the robot on a platform that insulates the gyro from anything else (ex. wood,rubber,etc)
Last year we put it in a wood box and mounted the box to the frame. |
Re: How to Mount a Gyro
Mount it firmly to the robot - some vibration is OK but letting it move relative to the chassis is bad. As above mentioned, the center of the chassis base is a good idea, down low is good.
We have used velcro to good effect, allowing for easy mounting and removel when necessary. We have also used small non-metal screws (there are mounting holes) and even zip ties successfully. On a practice bot, we held it down with duct tape. |
Re: How to Mount a Gyro
Why does it matter how close to the center of the robot they are? I've been trying to figure that one out for a while.
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Re: How to Mount a Gyro
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Re: How to Mount a Gyro
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For example, the ADXRS300 datasheet says that a linear acceleration will cause a false response of 0.2 °/s/g. It's not much, but it introduces a rotational bias that can look like gyro drift as the sensor turns first one direction, then the other. |
Re: How to Mount a Gyro
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So if the gyro were mounted, say, 38/2 = 19 inches away from the center of rotation of the robot, and the robot were rotating at 180 degrees per second, you could calculate the effect: 180 degrees/sec = 3.14 radians/sec (3.14^2)*(19) = 187.5 inches/sec^2 = 15.6 ft/sec^2 = 0.488 g's radial acceleration So (0.2 degrees/sec/g)*(0.488 g) ~= 0.1 deg/sec |
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Thanks for the analysis! |
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