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Inertial navigation is a method of determining a vehicle's position and velocity using measurements from accelerometers and gyroscopes. These sensors measure the acceleration and angular velocity of the vehicle, and the system uses this information to integrate the velocity and position of the vehicle over time.
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[](https://www.sciencedirect.com/science/article/pii/S1665642314700963)
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_This image shows the reference frame of a car associated with the WGS 84 reference frame._
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The basic principle of inertial navigation is to use the laws of motion to calculate the position and velocity of a moving object. The accelerometers in the system measure the linear acceleration of the vehicle, and the gyroscopes measure the angular velocity. These measurements are then integrated over time to calculate the position and velocity of the vehicle.
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**Inertial navigation systems are composed of three main components:**
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| ... | ... | @@ -14,6 +17,8 @@ The basic principle of inertial navigation is to use the laws of motion to calcu |
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[](https://www.globalspec.com/learnmore/sensors_transducers_detectors/tilt_sensing/inertial_gyros)
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_This image shows some inertial sensors._
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The system uses a combination of dead reckoning and Kalman filtering to calculate the position and velocity of the vehicle. Dead reckoning is the process of using the initial position and velocity of the vehicle and integrating the accelerometer and gyroscope measurements to estimate the position and velocity of the vehicle over time.
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Inertial navigation systems have several advantages over other navigation methods, such as being relatively independent of external factors, such as GNSS signal availability, providing accurate navigation in areas where GPS signals are weak or absent, and providing continuous navigation even when the GPS signals are lost.
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| ... | ... | @@ -23,4 +28,5 @@ However, inertial navigation also have some limitations, such as the accumulatio |
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Overall, inertial navigation is a method of determining a vehicle's position and velocity using measurements from accelerometers and gyroscopes. The system uses the laws of motion to calculate the position and velocity of a moving object by integrating the measurements from the sensors over time. It is relatively independent of external factors, such as GPS signal availability, it provides accurate navigation in areas where GPS signals are weak or absent, and providing continuous navigation even when the GPS signals are lost. However, it is important to note that the system has some limitations such as errors accumulation over time, the need for regular calibration and alignment, and sensitivity to temperature changes and vibrations.
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Sources :
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[Munguía, R. (2014), A GPS-aided inertial navigation system in direct configuration, Journal of Applied Research and Technology, Volume 12, Issue 4, Pages 803-814](https://www.sciencedirect.com/science/article/pii/S1665642314700963) |
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- [Munguía, R. (2014), A GPS-aided inertial navigation system in direct configuration, Journal of Applied Research and Technology, Volume 12, Issue 4, Pages 803-814](https://www.sciencedirect.com/science/article/pii/S1665642314700963)
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- [https://www.globalspec.com/learnmore/sensors_transducers_detectors/tilt_sensing/inertial_gyros](https://www.globalspec.com/learnmore/sensors_transducers_detectors/tilt_sensing/inertial_gyros) |
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