A rapid recovery method for the environment inside the rocket fairing based on model predictive control

Abstract

The invention relates to a method for quickly restoring the environment inside a rocket fairing based on model predictive control, and belongs to the technical field of temperature and humidity prediction. First of all, a mechanism model of temperature and humidity inside the fairing with / without air supply is established to predict the temperature and humidity inside the fairing, so as to obtain the timely feedback information of the temperature and humidity inside the fairing during the rapid recovery process of the environment inside the fairing and the starting time of the fairing. The temperature and humidity parameters in the initial state of the internal environment; then, in order to realize the rapid and safe recovery of the environment inside the fairing, a multivariable dynamic matrix controller is designed, including three elements of model prediction, rolling optimization and feedback correction, and in its rolling optimization Constraints are introduced to prevent unsafe events such as dew condensation and temperature and humidity parameters exceeding the safe range; finally, in order to overcome the influence of uncontrollable input, the feedforward method is used to pre-compensate it.

Description

Technical field [0001] The present invention belongs to the field of temperature and humidity prediction technology, relates to a method of rapid recovery of the environment in a rocket fairing based on model predictive control. Background [0002] As the central brain of the fairing, the main function of the environmental support system in the rocket fairing is to provide a temperature, humidity, and cleanliness-qualified environment for the payload after it is transferred to the launch site and before launch, so as to ensure the safety of various equipment, instruments and meters such as the payload, the launch vehicle and its measurement and control system during this period, so as to complete the detection and launch preparation work before the launch of the payload and ensure the successful launch of the payload. According to the different loads of spacecraft, the environmental parameter guarantee range in the fairing is generally as follows: the temperature should be contro...

AI Technical Summary

Problems solved by technology

At present, the environmental protection system inside the rocket fairing only uses the PID control algorithm to realize the automatic control of the temperature and humidity inside the fairing for the conventional process guarantee situation, while the special process guarantee situation is still in the stage of manual adjustment based on human experience, which is far away. It cannot meet the safe, reliable, efficient, and intelligent requirements of the development of the modern aerospace industry for the environmental protection system inside the rocket fairing.

Images