A ball socket nozzle load characteristic identification method for servo system load matching

Abstract

The invention belongs to the technical field of electromechanical servo systems, and particularly relates to a ball socket nozzle load characteristic identification method for servo system load matching. The method comprises a coulomb friction torque identification method, a viscous friction torque identification method, an elastic torque identification method and an inertia torque calculation method. By means of the method, accurate load characteristic parameters of a large ball socket nozzle can be identified, matching of the servo system and the load characteristics of the ball socket nozzle is achieved, and the performance requirement for thrust vector control of a solid rocket is met.

Description

technical field [0001] The invention belongs to the technical field of electromechanical servo systems, and in particular relates to a ball-and-socket nozzle load characteristic identification method for servo system load matching. Background technique [0002] Servo system is a collective name for the closed-loop system of the flight control of the launch vehicle. One of its typical applications is to push the engine nozzle to achieve thrust vector control and complete the control of the rocket attitude. In the past, due to the constraints of objective conditions, technological level and technical reserves, all the full-axis swing single nozzles of medium and large solid launch vehicles in my country used flexible nozzles. After decades of development, in the process of technological progress and engineering experience accumulation, the load characteristics of large flexible nozzles have been fully grasped, that is, the load characteristics of the linear elastic moment grad...

AI Technical Summary

Problems solved by technology

This has resulted in a double contradiction between the inherent load characteristics of the ball-and-socket nozzle and the performance index requirements of the control system.

[0006] Whether it is basic theoretical research or engineering application of large-scale ball-and-socket nozzles, it is still in its infancy in China, and there is no mature theoretical basis and engineering application experience.

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