Drag-tracking guidance for entry vehicles without drag rate measurement

作者：Yan Han^*; He Yingzi

来源：Aerospace Science and Technology, 2015, 43: 372-380.

DOI：10.1016/j.ast.2015.03.019

• Entry vehicle
• Drag-tracking
• Input-to-state stability
• High-gain observer
• Robustness

A robust entry guidance law without drag rate measurement is designed for drag-tracking in this paper. The bank angle is regarded as the control variable. First, a state feedback guidance law (bank angle magnitude) that requires the drag and its rate as feedback information is designed to make the system with the drag-tracking error and its rate as states be input-to-state stable (ISS) with respect to uncertainties. Then a high-gain observer is utilized to estimate the drag rate which is difficult for a vehicle to measure accurately in practice. Stability analysis as well as simulation results shows the effectiveness of the presented approach.

• 出版日期2015-6
• 单位北京控制工程研究所