Longitudinal Dynamic Prediction Control For Hypersonic Vehicle With Incomplete Data Transmission

Hypersonic vehicle has become a hot research topic in many countries with its high speed,which represents the research in the field of Aeronautics and Astronautics. Aircraft flying at high speeds and fluid in through the body will generate aerodynamic heat. Pneumatic heat itself will reduce the body stiffness, lead to the body of the elastic deformation of the certain degree, causing aircraft lift, resistance and the change of the engine thrust. At the same time, body elastic deformation will cause the change of the flow field around a vehicle, further aggravate the aircraft force change. Moreover, the hypersonic vehicle must satisfy several flight hard constraints. At the same time, due to the actual system data transmission inevitably exists congestion or crash data,node failure or interruption of the connection and other problems, the aircraft systems-sensor controller and controller-execution path data loss phenomenon, which will lead to control system performance degradation, seriously may occur when the system is unstability. Therefore, the design of a controller to ensure its stability which is still a hypersonic vehicle control system design of the problem to be solved. In this paper, we study the application of predictive control algorithm in the longitudinal channel control of the hypersonic vehicle.Firstly, paper introduced the superb hypersonic vehicle geometry model and handling characteristics, and the hypersonic hypersonic vehicle with six degrees of freedom nonlinear motion equations are decoupled longitudinal channel model, also for hypersonic vehicles of zero input response analysis and prepare for the following controller design and simulation.Secondly, the longitudinal channel of hypersonic vehicle is considered as the research object,and the data loss in the control system of the aircraft is considered in the sensor-controller and controller-actor. In hypersonic balance linearizing the model of vehicle longitudinal channel, the establishment of a system dynamics model of missing data, using a terminal state constraint set and the terminal cost function to design predictive controller design and compensation strategies to achieve superior sonic flight device input command tracking.Finally, in the hypersonic vehicle cruise large envelope flight, considering the system measured channel data loss situation, formulate corresponding multi model switching strategy and is designed to stability of aircraft flight predictive controller and makes the aircraft to track the speed reference instruction.