Integral proportional guidance nonlinear correction method

Abstract

The invention discloses an integral proportional guidance nonlinear correction method mainly applied in the guidance law adopting angle guidance. The deviation of nonlinear effects is equivalent to the corresponding guidance law angle initial value zero position, the initial angle is corrected, and therefore the overload nonlinear part in the corresponding instruction generation is eliminated. By means of the method, the ballistic overshoot influence caused when high-altitude overload response is too low and response is insufficient, and particularly nonlinearity caused by the large airspace span in a flying process and caused in the instruction switching process is overcome, and the method can be adopted when a guided missile attacks a stable moving target.

Description

technical field [0001] The invention belongs to the technical field of guidance control, and specifically relates to an integral proportional guidance nonlinear correction method, which ensures that the overload command will not overshoot due to the nonlinear response, and realizes the integral proportional seeker when striking a moving target The ballistic characteristics of are closer to those of proportional guidance. [0002] technical background [0003] The integral proportional guidance is integrated from the original proportional guidance angular velocity guidance, so that the angular guidance method can be applied to strike moving targets. Taking the pitch direction as an example, the basic principle is: the proportional seeker is characterized by the instantaneous velocity vector rotational angular velocity is the projectile to achieve the rotational angular velocity 2 to 6 times; and the integral proportional guidance takes a certain moment as a benchmark, and ...

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Problems solved by technology

However, in the process of engineering use, it is found that the lag of the guidance law response is only one of the aspects. The other aspect is that Δθ and Δq for any segment of the trajectory must strictly obey the response relationship of the proportional item coefficient. If there is no response or the response is insufficient, Then the Δq change corresponding to the unresponsive will enter the q 0 erroneous overload command (proportional guide Real-time refresh, insufficient command response at the previous moment will not affect the next moment), resulting in overshooting of the trajectory

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