267 research outputs found
A New Proportional-Integral Guidance Law
No full textThis paper proposes a new proportional-Integral (PI) guidance law for maneuvering targets interception. We first investigate the physical interpretation of the PI guidance law and the analysis results reveal that the PI guidance law is exactly the same as a direct model reference adaptive guidance law: the integral term in PI control plays the same role as the adaptive law in adaptive control. Based on this fact, we suggest a new PI guidance law by leveraging a modified reference model to improve the transient performance. Numerical simulation results are conducted to validate the analytic findings
Game-theoretic flexible-final-time differential dynamic programming using Gaussian quadrature
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Comparison analysis for classification algorithm in data mining and the study of model use
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Polarization rotation of chiral fermions in vortical fluid
No full textThe rotation of polarization occurs for light interacting with chiral materials. It requires the light states with opposite chiralities interact differently with the materials. We demonstrate analogous rotation of polarization also exists for chiral fermions interacting with quantum electrodynamics plasma with vorticity using chiral kinetic theory. We find that the rotation of polarization is perpendicular both to vorticity and fermion momentum. The effect also exists for chiral fermions in quantum chromodynamics plasma with vorticity. It could lead to generation of a vector current when the probe fermions contain momentum anisotropy
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