Method for transonic shock wave interference adaptive suppression of altitude channel

A transonic and high-altitude technology, applied in directions such as navigation through speed/acceleration measurement, can solve problems such as adverse effects, combined altitude fluctuations, and static pressure fluctuations, and achieve the effect of strong engineering application value
CN101706283BInactive Publication Date: 2011-10-19NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
2 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2011-10-19
Estimated Expiration
Not applicable Β· inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a method for transonic shock wave interference adaptive suppression of an altitude channel, belonging to the field of inertia / atmosphere combination navigation. In the invention, an inertial navigation altitude and an atmosphere altitude are solved according to the principles of an inertia navigation system and an atmosphere data system. When transonic section static pressure fluctuation causes atmospheric pressure altitude fluctuation, an adaptive wave filter is utilized to treat a difference value of the atmospheric pressure altitude or the inertial navigation altitude and the atmospheric pressure altitude, and the wave filter outputs corresponding shock wave interference signals; the shock wave interference signals are fed back, and subtract the atmospheric pressure height so as to cancel shock wave interference, or the shock wave interference signals subtract the static pressure after unit conversion so as to cancel the shock wave interference; and an adaptive algorithm is utilized, the adaptive wave filter is regulated according to a altitude difference value of the atmospheric pressure altitude and the inertial navigation altitude, the altitude difference value revises the inertial navigation altitude through an altitude channel damping loop, and a combination altitude for suppressing the shock wave interference is obtained, thereby cancellation and suppression of altitude channel transonic shock wave interference signals are realized. The invention provides stable and reliable attitude information with high accuracy for an aircraft, enhances the navigation control accuracy of the aircraft and improves the operation performance of the aircraft.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a method for suppressing shock wave interference in a height channel when an aircraft flies at a transonic speed, and belongs to the field of inertial / atmospheric combined navigation. Background technique

[0002] Inertial navigation systems and air data systems are widely used navigation systems in modern aircraft. The inertial navigation system is a high-precision autonomous navigation system. It completely relies on the airborne equipment to complete the navigation task independently, and does not have any optical or electrical contact with the outside world. And the ability of global navigation, it can provide navigation parameters such as the position, velocity, attitude, acceleration and angular velocity of the carrier. The air data system is a multi-input and multi-output airborne comprehensive measurement system. It measures the force between the aircraft and the atmosphere and the atmospheric data (such as atmospheric...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More