ArticleGust Alleviation by Active–Passive Combined Control of the Flight Platform and Antenna Array for a Flying Wing SensorCraft

SensorCraft is an intelligence, surveillance, and reconnaissance (ISR) system that integrates unmanned flight platforms airborne antenna arrays. Under gust loads, the high–aspect–ratio, light–wing structure of has considerable bending torsion deformation, affecting performance leading to loss arrays’ electromagnetic performance. Taking as background, a wing conformal array was designed, aircraft model with passive wingtip device established, control law developed by LQG/LTR method, alleviation active–passive combined method “LQG/LTR active controller + device” proposed. By constructing unsteady aerodynamic reduced–order (ROM) based on Volterra series pattern fast modal form, effectiveness platform analyzed. The results show structural deformation leads changes in main lobe gain, beam direction, sidelobe level. obvious advantages. Compared peak value displacement reduced 15.6%, gain 0.72 dB, which conducive better array.