Calibration and Its Effect on Precision of a Low-Cost Artificial Unit

There exist many projects and articles dealing with inertial navigation units using low-cost sensors. However, they mostly establish that low-cost sensors are not suitable to use in inertial navigation units, because of their precision. As everybody knows this kind of units generally uses three accelerometers and three angular rate sensors orientated into the aircraft framework. Of course, there are many techniques in a sensing and an evaluation of angular rates and acceleration, but mentioned principle is the basic one. The paper concerns a technique that utilizes different configuration of accelerometers sensing axes to enable attitude evaluation based on acceleration. The paper also deals with the unit framework calibration that is used to increase a unit precision in aircraft attitude and position evaluation.