A profile tracking guidance method based on global integrated sliding mode control is designed for the high precision guidance of the hypersonic vehicle gliding phase considering the influence of complex multi-constraint conditions and interference and uncertainty factors. First, the multiple constraints are transformed into the reentry corridor in the drag acceleration velocity (D-V) plane. A standard D-V profile is then optimized and designed in the form of subsection function with the terminal precision and total heat absorption as performance indexes. Moreover, based on the simplified dynamic model, the second order nonlinear model of drag acceleration differential and velocity is derived. Finally, based on the sliding mode control theory, the global integral sliding mode surface and exponential approach law are designed to obtain the amplitude of the control quantity, and the symbol of the control quantity is determined by combining with the lateral azimuth error corridor, so as to realize the effective tracking of the standard profile. The CAV-H glide reentry model is used for numerical simulation, and it is verified that the proposed profile tracking guidance law based on sliding mode control has desirable tracking performance and accuracy.
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