Development of a control system model for a demonstrator landing module with a multi-chamber propulsion unit with a central body

The article presents an approach to the synthesis of a demonstrator control system used to test control algorithms for an aircraft with a multi-chamber propulsion system. The use of such demonstrators allows testing individual units of equipment, assessing the capabilities of the technologies used, developing and testing design methods and determining the required parameters of the components to ultimately obtain the desired properties of the product as a whole. The objective of the work was to synthesize a demonstrator model with a complex mechanical design that allows the demonstrator to move during takeoff and landing, taking into account the characteristics of the mechanical part and the demonstrator's propulsion system, its control algorithms, characteristics of the sensors and fuel flow regulators used. The article presents the derivation of dynamic equations of motion for the demonstrator parts based on the use of Lagrange equations of the second kind. The structures of the demonstrator's tracking systems are presented, approaches to the synthesis of stabilization system regulators are given in order to obtain the required static and dynamic properties of the control system. The results of modeling the demonstrator's motion during takeoff and landing are shown. The modeling was performed using the Simulink software system. The results of digital modeling of the demonstrator's motion allow us to conclude that it is possible to use a multi-chamber propulsion system with a central body to control the aircraft's motion without using dedicated engines and orientation mechanisms. In this case, control is based on regulating the supply of fuel and oxidizer to the groups of chambers of the propulsion system. The entire article is illustrated with the necessary amount of graphic material, and references to literary sources are provided that confirm the possibility and quality of using certain scientific approaches and technologies.