An inertial measurement unit (IMU) is a piece of electronic hardware that measures acceleration in addition to rotation using gyroscopes and accelerometers.
Thanks to the joint efforts of the inertial measurement unit (IMU), the global navigation satellite system (GNSS), and other sensors, the position and attitude of unmanned aerial vehicles (UAVs) may be calculated with high accuracy.
In the absence or obstruction of global navigation satellite system (GNSS) signals, inertial measurement units serve as the primary location sensor.
Drones include the Inertial Measurement Unit as a standard component.
IMUs are part of the collection of sensors that comprise the autopilot system of an unmanned aerial vehicle (UAV). They are a component of the Inertial Navigation System, which has additional sensors (INS). Monitoring and reporting on elements like orientation, velocity, and the effects of gravity, the IMU’s raw signals assist with navigation and control.
The flight control mechanism of the drone relies heavily on this component. This capability enables drones to accomplish their missions and maintain flying stability. When the raw data from the IMU is combined with measurements from other sensors in a Kalman filter, the filter outputs the following navigation data:
- Rotational Rates in Various Attitudes.
- Straight-line speed.
How to install an inertial measurement unit in a UAV most effectively
Selecting the Appropriate Inertial Measuring Unit. There are several factors to consider while determining which option will work best for you. When selecting an IMU, performance, the underlying technology, SWaP (size, weight, and power), and cost are all crucial factors.
Additionally, the longevity of the inertial measurement unit (IMU) is an important aspect of UAVs. Vibrations and temperature variations are conceivable when utilizing an unmanned aerial vehicle (UAV) in a hostile environment. Inertial measurement units (IMUs) for unmanned aerial vehicles (UAVs) must be constructed to resist harsh circumstances.
The benefits of using an appropriate inertial measurement unit
IMUs are subjected to substantial strain by drones and other high-performance applications; hence, they must be exceedingly dependable and potent. A high-performance IMU with vibration resistance and temperature stability will strengthen the dependability of drone flight operations. This enables more precise steering even in extreme turbulence.
The inertial measurement units used in the veronte Autopilot are among the finest currently available (IMUs). Each of the three integrated IMU units has a gyroscope and an accelerometer, which both measure motion along three distinct axes. The Autopilot is equipped with three inertial measurement units (IMUs) and a barometer to assure its dependability and performance.
In addition, one of these IMUs is mechanically insulated from vibration, but the other two vibrate in unison with the autopilot. This paves the way for more complex navigation techniques and the incorporation of elements such as the RPM rotor estimation utilized by helicopters. Moreover, Embention offers the 4X with 9 IMUs for usage in scenarios requiring the highest level of safety.
If a high-precision IMU is required, the Autopilot is capable of connecting to a variety of external sensors. The successful integration of Autopilot with third-party MEMS IMU and FOG IMU sensors from companies such as VectorNav, iXblue, and Inertial Labs has matched the requirements of projects such as GNSS-denied navigation with unmanned aerial aircraft (UAVs).