CDM (Coefficient Diagram Method)-based missile autopilot design method

Abstract

The present invention provides a CDM (Coefficient Diagram Method)-based missile autopilot design method. The design method comprises: figuring out an open-loop characteristic polynomial P0(s), and drawing a coefficient map of the open-loop characteristic polynomial P0(s) based a coefficient map drawing method in the CDM; determining the structure of an autopilot according to the convexity of curves in the coefficient map of the open-loop characteristic polynomial P0(s), and obtaining a closed-loop characteristic polynomial P(s) having autopilot control parameters; selecting a stability index [gamma]i and an equivalent time constant tau, and figuring out a closed-loop characteristic polynomial P(s) of the system; and equating coefficients of corresponding orders of the two closed-loop characteristic polynomial P(s), and working out the autopilot control parameters. The method provided by the invention is applicable in the design of the missile autopilot, and can realize online setting of the parameters of the autopilot, providing simple operation and convenience in implementation, and achieving satisfactory effects in overload instruction tracking and anti-interference performance.

Description

technical field [0001] The invention relates to the technical field of aircraft guidance and control, in particular to a CDM-based missile autopilot design method. Background technique [0002] With the advancement of modern science and technology, the combat environment of the modern battlefield tends to become more complex. Therefore, modern combat weapons, especially guided weapons, require stronger anti-jamming capability and better maneuverability. For the new generation of air-to-air missiles, it has a complex combat environment with large angle of attack, large overload, and large airspace. Due to the complexity of the flight environment and the drastic changes in the aerodynamic parameters, the missile body model has great uncertainty, coupled with the influence of external interference and input noise on the system performance, so a simple method is used to obtain a relatively robust autopilot It has very important engineering significance. In the traditional cla...

AI Technical Summary

Problems solved by technology

This method is simple in structure, good in stability, reliable in operation, and convenient in parameter adjustment, but the prior art has not yet combined CDM and the design method of the autopilot

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