Navigation FAQs
8 frequently asked questions about navigation technology.
Imu (4)
What systematic errors does IMU calibration address in precision IMUs?
IMU calibration identifies and compensates for inherent systematic errors like bias, scale factor, and misalignment, ensuring high accuracy for precision GNC applications.
What are the key performance differences between FOG-based and MEMS-based IMUs for high-precision navigation?
FOG-based IMUs offer superior long-term stability and accuracy for demanding aerospace applications, while MEMS-based IMUs provide a compact, cost-effective solution for less stringent precision needs.
How does a precision IMU complement other sensors in an integrated navigation system for continuous positioning?
A precision IMU provides high-rate attitude, velocity, and position updates, bridging gaps and enhancing accuracy when other sensors like GNSS are unavailable or provide lower-rate data.
What advanced techniques are commonly used to continuously compensate for IMU drift in precision guidance applications?
Advanced techniques like Kalman filtering, particle filtering, and sensor fusion with external references are crucial for continuous IMU drift compensation in precision guidance applications.
Fog (2)
What critical criteria should buyers use when selecting a fiber optic gyroscope manufacturer?
Buyers should prioritize a manufacturer's proven performance specifications, robust environmental reliability, stringent quality control, and responsive technical support for precision GNC applications.
In what precision GNC applications are single-axis fiber optic gyroscopes particularly advantageous?
Single-axis FOGs excel in applications requiring highly accurate angular rate measurement along one specific axis, such as platform stabilization, antenna pointing, or pipeline inspection, where multi-axis solutions are overkill.
Ins (2)
What inherent characteristics of precision IMU components primarily influence the long-term drift and accuracy of an Inertial Navigation System (INS)?
Long-term INS drift and accuracy are primarily governed by the inherent biases, scale factor stability, and noise characteristics of the gyroscopes and accelerometers within the IMU.
What is the difference between tightly coupled and loosely coupled architectures in embedded GPS/INS systems?
Tightly coupled GPS/INS systems integrate raw GPS measurements directly with the INS filter, offering superior accuracy and resilience in challenging environments, unlike loosely coupled systems which only use processed GPS position and velocity data.