Title:Development Status and Future Prospects of Strapdown Inertial Navigation Technology
Volume: 18
Author(s): Hongbo Liu, Juncheng Wu, Yuze Lin and Xiaodong Yang*
Affiliation:
- School of Mechanical and Power Engineering, Harbin University of Science and Technology, Harbin 150080, P.R.
China
Keywords:
Strapdown inertial navigation system, gyroscope, initial alignment, error compensation, inertial technology, accelerometer.
Abstract:
Background: Inertial navigation is a comprehensive technology involving precision
machinery, computer technology, microelectronics, optics, automatic control, materials, and other
disciplines and fields. Strapdown inertial navigation systems have gradually developed into the
mainstream and direction of inertial navigation systems because of their small size, low cost, simple
structure, and high reliability. The angular rate and acceleration information of the carrier relative
to the inertial space are measured by the inertial measurement unit (IMU), and the instantaneous
velocity and position information of the carrier are automatically calculated by Newton's law
of motion. It has the characteristics of not relying on external information, not radiating energy to
the outside world, not being disturbed, and good concealment. Therefore, it is widely used in aerospace,
aviation, and navigation, especially in the military field.
Objective: This paper describes the development history of the Strapdown Inertia Navigation System
summarizes the research status of the Strapdown Inertia Navigation System, and looks forward
to its future development direction.
Methods: The key technologies of strapdown inertial navigation systems are investigated, and the
related research on strapdown inertial navigation technology is understood in detail. The hardware
composition and related algorithms of the strapdown inertial navigation system are analyzed in
detail.
Results: Nowadays, strapdown inertial navigation technology is the mainstream of inertial navigation
technology. Compared with the gimbaled inertial navigation system technology, the
strapdown inertial navigation system has higher precision, smaller volume, and lower cost. At present,
the initial alignment technology, error compensation technology, navigation algorithm technology,
and inertial device technology of strapdown inertial navigation technology have made full
development.
Conclusion: With the development of initial alignment technology, error compensation technology,
navigation algorithm technology, and inertial device technology, the accuracy, response speed
and anti-interference ability of strapdown inertial navigation technology have been significantly
improved. The development of strapdown inertial navigation is closely related to the gyroscope
technology which belongs to inertial device technology. The strapdown inertial navigation system
based on optical gyroscopes such as laser gyroscopes and fibre optic gyroscopes is mature, and the
MEMS strapdown inertial navigation system has a wide application prospect compared with the
optical gyroscope strapdown inertial navigation system.
