The accuracy of a flight simulation is highly dependent on the quality of the aerodynamic database and prediction accuracies of the aerodynamic coefficients and derivatives. A surrogate model is an approximation metho...The accuracy of a flight simulation is highly dependent on the quality of the aerodynamic database and prediction accuracies of the aerodynamic coefficients and derivatives. A surrogate model is an approximation method that is used to predict unknown functions based on the sampling data obtained by the design of experiments. This model can also be used to predict aerodynamic coefficients/derivatives using several measured points. The objective of this paper is to develop an efficient digital flight simulation by solving the equation of motion to predict the aerodynamics data using a surrogate model. Accordingly, there is a need to construct and investigate aerodynamic databases and compare the accuracy of the surrogate model with the exact solution, and hence solve the equation of motion for the flight simulation analysis. In this study, sample datas for models are acquired from the USAF Stability and Control DATCOM, and a database is constructed for two input variables （the angle of attack and Mach number）, along with two derivatives of the X-force axis and three derivatives for the Z-force axis and pitching moment. Furthermore, a comparison of the value predicted by the Kriging model and the exact solution shows that its flight analysis prediction ability makes it possible to use the surrogate model in future analyses.展开更多
We present a comprehensive theoretical analysis of the general standard model(GSM),a recently proposed framework that unifies particle physics and cosmology within the gravitational quantum field theory(GQFT).Construc...We present a comprehensive theoretical analysis of the general standard model(GSM),a recently proposed framework that unifies particle physics and cosmology within the gravitational quantum field theory(GQFT).Constructed from first principles based exclusively on the intrinsic properties of leptons and quarks,the GSM reveals an enlarged gauge symmetry structure,WS_(c)(1,3)×GS(1)×Z_(2),which extends beyond the conventional U_(Y)(1)×SU_(L)(2)×SU_(C)(3) symmetry of the standard model.Here,WS_(c)(1,3) = SP(1,3)⋊W^(1,3)⋊SP_(c)(1,1) emerges as the conformal inhomogeneous spin gauge symmetry.Within GQFT,the GSM provides a consistent unification of the standard model of particle physics with cosmological models.It incorporates the four known fundamental interactions,electromagnetic,weak,strong,and gravitational,plus the Higgs scalar interaction,and also predicts novel interactions.These include spin gauge,chirality boost-spin gauge,chiral conformal-spin gauge,and scaling gauge forces,as well as additional scalar interactions.Furthermore,the GSM offers profound insights into the nature of gravity and spacetime and elucidates key mysteries of the dark side of the universe,such as the origins of dark matter,the dynamics of dark energy,and the physics of the early inflationary epoch.By establishing a new theoretical bridge between quantum field theory and general relativity,the GSM opens novel pathways for addressing long-standing challenges in fundamental physics.It provides a unified description of both fundamental interactions and cosmic evolution.展开更多
文摘The accuracy of a flight simulation is highly dependent on the quality of the aerodynamic database and prediction accuracies of the aerodynamic coefficients and derivatives. A surrogate model is an approximation method that is used to predict unknown functions based on the sampling data obtained by the design of experiments. This model can also be used to predict aerodynamic coefficients/derivatives using several measured points. The objective of this paper is to develop an efficient digital flight simulation by solving the equation of motion to predict the aerodynamics data using a surrogate model. Accordingly, there is a need to construct and investigate aerodynamic databases and compare the accuracy of the surrogate model with the exact solution, and hence solve the equation of motion for the flight simulation analysis. In this study, sample datas for models are acquired from the USAF Stability and Control DATCOM, and a database is constructed for two input variables （the angle of attack and Mach number）, along with two derivatives of the X-force axis and three derivatives for the Z-force axis and pitching moment. Furthermore, a comparison of the value predicted by the Kriging model and the exact solution shows that its flight analysis prediction ability makes it possible to use the surrogate model in future analyses.
基金supported by the National Key Research and Development Program of China (Grant No.2020YFC2201501)the National Natural Science Foundation of China (Grant Nos.12547104,12441504,12147103 and 11821505)the Strategic Priority Research Program of the Chinese Academy of Sciences。
文摘We present a comprehensive theoretical analysis of the general standard model(GSM),a recently proposed framework that unifies particle physics and cosmology within the gravitational quantum field theory(GQFT).Constructed from first principles based exclusively on the intrinsic properties of leptons and quarks,the GSM reveals an enlarged gauge symmetry structure,WS_(c)(1,3)×GS(1)×Z_(2),which extends beyond the conventional U_(Y)(1)×SU_(L)(2)×SU_(C)(3) symmetry of the standard model.Here,WS_(c)(1,3) = SP(1,3)⋊W^(1,3)⋊SP_(c)(1,1) emerges as the conformal inhomogeneous spin gauge symmetry.Within GQFT,the GSM provides a consistent unification of the standard model of particle physics with cosmological models.It incorporates the four known fundamental interactions,electromagnetic,weak,strong,and gravitational,plus the Higgs scalar interaction,and also predicts novel interactions.These include spin gauge,chirality boost-spin gauge,chiral conformal-spin gauge,and scaling gauge forces,as well as additional scalar interactions.Furthermore,the GSM offers profound insights into the nature of gravity and spacetime and elucidates key mysteries of the dark side of the universe,such as the origins of dark matter,the dynamics of dark energy,and the physics of the early inflationary epoch.By establishing a new theoretical bridge between quantum field theory and general relativity,the GSM opens novel pathways for addressing long-standing challenges in fundamental physics.It provides a unified description of both fundamental interactions and cosmic evolution.
