Wide-Speed Vehicle Control Considering Flight-Propulsion Coupling Constraints

To reduce the influence of flight-propulsion coupling of a wide-speed vehicle on itself, this study investigated the integrated control considering the flight-propulsion coupling constraints. First, a control-oriented mathematical model of flight-propulsion integration for a wide-speed vehicle was established. On this basis, the nonlinear dynamic inversion (NDI) and incremental nonlinear dynamic inverse (INDI) control methods were adopted to design the attitude control algorithms of the slow outer loop and fast angular rate inner loop, respectively. The necessary modules, such as reference model, error control, and online estimation, were introduced into the NDI controller to ensure flight quality and robustness of the wide-speed vehicle. Then, based on the online model that involves the flight-propulsion coupling characteristics (FPCCs) of the wide-speed vehicle, a coupling control scheme for the wide-speed vehicle that considers its attitude and engine was designed by manipulated cross-linking. Simulation results indicate that the proposed NDI flight-propulsion control scheme can effectively address the flight-propulsion coupling of the wide-speed vehicle and guarantee the expected control performance.