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The page is using some imprecise language, bordering on confusing. This quote especially: To measure those and other variables many people combine the two sensors, to create an inertial measureme …

The easiest way to simulate a messy "real world" sensor from an ideal simulation is to look at what effects a sensor has to overcome. For example: vibrations at multiple frequencies impulse noise d …

You might find that the rPI boards are more durable than you expected. There isn't much mass to them, so a small amount of rubber or foam padding (to reduce rattling around) should be sufficient to p …

Entire volumes have been written on "sensor fusion", which is the act of combining measurements from multiple sensors (e.g. your gyro, accelerometer, and compass). … Here is a document that discusses the development of a sensor fusion system with gyroscope, accelerometer, and compass so you get an idea of what's involved. …

You're essentially designing an "inverted pendulum" PID controller. If you search for that, you should find a lot of good information on the calculations you need to make.

Since you are attempting to slow down a car when the road gets too bumpy, a PID controller is not what you want. Or rather, the bumpiness of the road will determine the desired speed that goes into t …

Essentially you are talking about a low-pass filter on your output. Kalman filtering is probably your best option for accuracy, but simply calculating a moving average should go a long way toward qui …

As noted at the top of the second page: $B_z^{0g} = a_{z1}-S_{zz}*1g$ The "ground truth" z-axis acceleration (of an accelerometer sitting flat on the table) is $1g$, which is affected by the sensitivity … of the accelerometer along that axis. …

Typically, you'd combine a high-accuracy-low-frequency method like GPS (or other triangulation-based scheme) with a moderate-accuracy-high-frequency method like an accelerometer or gyro. …

The short answer is "yes". Accelerometers can be used to improve stability by measuring slight changes in movement. But most importantly, they can tell a walking robot which direction is down.

Gyroscopes will only give you the rate of change of the yaw angle, not the absolute yaw angle. Unless you plan to set the yaw angle initially and have it drift further and further into garbage valu …