Since the concept of scramjet was firstly proposed in the 1950s, hypersonic vehicle (HSV) has exhibited many important military and civilian applications. Its development directly reflects the technology power and comprehensive strength of a country. As the centerpiece of HSV core technologies, control system design is the key technology for HSV to accomplish assigned tasks. However, it also poses huge challenges to designers due to complicated vehicle features, such as large flight envelope, fast time-varying vehicle behaviors, and significant modal couplings. This dissertation considers both rigid and flexible hypersonic vehicles. Based on comprehensive analysis of vehicle features, several key problems of HSV tracking control in large envelopes, including cruise and entry flights, are deeply investigated. The main contributions are addressed as follows. (1). Motion equations of a rigid generic hypersonic vehicle (RGHV) and a flexible air-breathing hypersonic vehicle (FAHV) are separately derived. Model features are comprehensively analyzed from a control perspective, indicating the properties of nonlinearity, time-scale separation, strong couplings from the engine system and the flexible modes, fast time-varying parameters, and multiple uncertainties. Particularly, in the flexibility coupling analysis, rigid modes are categorized by different coupling levels; in the fast time-varying feature analysis, the influences of varying dynamic pressure to the vehicle characteristics are deeply investigated. (2). A robust cruise control scheme based on feedback linearization (FL) and active disturbance rejection control (ADRC) is proposed for the RGHV. This scheme firstly designs a FL control frame. Then in order to solve intractable flight problems such as large maneuver command tracking and multiple uncertainties rejection, several robust control techniques are integrated. Function generators are designed to arrange desired transient processes for large maneuver commands. Extended state observers (ESOs) are designed to estimate and compensate diverse uncertainties. In addition, a particle swarm optimization algorithm is designed to optimize feedback control gains. (3). A robust entry attitude control scheme based on trajectory linearization control (TLC) and ADRC is proposed for the RGHV. Based on PD-eigenvalue theory, an adaptive time-varying bandwidth algorithm is designed to suppress the influences of fast time-varying dynamic pressure to closed...
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