A moving base transfer alignment method suitable for barrel-mounted oblique launch missiles

Abstract

The invention discloses a method for transferring and aligning a moving base suitable for barrel-mounted oblique launch missiles, and relates to the technical field of aerospace strapdown inertial navigation, including using the initial position, speed and attitude information of the main inertial navigation as the sub-inertial navigation Initial value, and carry out inertial navigation strapdown calculation; establish a 15-dimensional state vector X including three-axis plus meter zero bias and celestial speed deviation k , according to the vertical angle of the missile, adjust the measurement noise variance matrix, carry out the alignment calculation of the sub-inertial navigation and obtain the real-time attitude misalignment angle and velocity of the sub-inertial navigation; Carry out correction calculation, and use the correction result as the initial value of the next period of navigation calculation. The invention not only solves the problem of decreased calculation precision and accuracy caused by the rotation between the projectile and the launch tube, but also improves the calculation precision of the attitude angle.

Description

Technical field [0001] The present invention relates to the field of aerospace space, and more particularly to a moving base transmission alignment method suitable for use in a cylindrical oblique emission missile. Background technique [0002] Passing alignment is a key technique for the application to precisely guided missiles. This technology not only has a complete self-essential feature, but also has a low cost, high precision, high volume miniaturization, and reliability. Therefore, in precise guidance Widely used in missiles. [0003] The transmitting platform for precise guided missiles often has a high-precision inertial system. Before the missile launch, the high-precision inertial system of the launch platform is calibrated with the unsubiltrative bombing inertial system, and estimates and eliminate the gesture error of the child. The method is called transmission alignment. The initial alignment that can quickly and accurately complete the inclusion system is largely ...

AI Technical Summary

Problems solved by technology

However, for the barrel-mounted oblique launch missile weapon system, during the erection process before launch, due to the limitation of tooling accuracy, there will inevitably be a certain rotation of the projectile relative to the launch tube. If the traditional transfer alignment algorithm is used If it is aligned, there will be problems such as a significant drop in calculation accuracy and the inability to guarantee the accuracy of alignment; in addition, in the actual inertial navigation alignment process, the existence of the zero offset of the added table and the deviation of the skyward speed will cause The reduction of inertial alignment accuracy, but the state vector established in the traditional transfer alignment algorithm does not take into account the influence of the two factors on transfer calibration, which will cause a significant decrease in calculation accuracy

Therefore, the traditional transfer alignment algorithm has certain limitations in the use of oblique launch weapon platforms

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