Parameter identification based separation control method

Abstract

The invention provides a parameter identification based separation control method. A vertical controlled object model is established; a control strategy is designed on the basis of the established model, concretely, an attack angle instruction profile is designed according to an equivalent pitch angle speed instruction, and according to the attack angle instruction profile, an attack angle instruction is generated to control a controlled object; first and second state observers are designed to observe the controlled object so as to identify a stable zero-control balanced state of the controlled object; the first state observer is also used for control the controlled object stably; and after that the controlled object is in the stable zero-control balanced state, the attack angle instruction is switched to that corresponding to initial time of the stable zero-control balanced state. The control method can be used to identify and stably control the stable balanced state of an aircraft, and the problems that an algorithm is incapable of convergence and the instantaneity is low in a present identification method are solved.

Description

technical field [0001] The invention relates to the technical field of aircraft control, in particular to a separation control method based on parameter identification. Background technique [0002] Existing hypersonic vehicles mostly adopt boost + cruise two-stage flight mode. The purpose of the booster stage is to send the load into the predetermined transfer window. In order to save weight and energy, most of the thrust reversers are not used. Therefore, in order to successfully realize the separation between the stages, the separation command must be issued at the end of the thrust. At the same time, for the aircraft that only achieves attitude stability control through thrust vector during the boosting process, facing the problems of insufficient control ability and large uncertainty in the later stage of thrust trailing, it is necessary to choose a statically stable equilibrium state where the torque is zero in the uncontrolled state. achieve stability control. Affec...

AI Technical Summary

Problems solved by technology

The general disadvantages of these methods are that the algorithm is complex, the demand for computing resources is large, and the convergence is often difficult to guarantee in the actual application process. It is generally suitable for slowly changing industrial processes, and it is difficult to truly apply to the aircraft control system.

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