The article discusses five local stories that, without being connected to each other, tell about the socio-cultural circumstances accompanying creation of works of art that have received significant (but not the highe...The article discusses five local stories that, without being connected to each other, tell about the socio-cultural circumstances accompanying creation of works of art that have received significant (but not the highest) recognition on a global scale. The discussion concerns three songs about cities: Torna a Surriento, Moscow Nights, and Li Beirut;a famous Soviet painting Low Marks Again;and the design features of Audi cars for the US market over the past decade. The approach to each certain artifact, be it song, painting, or the design of rear turn signals, is developed on the basis of disciplinary affiliation, whereas a discipline is more sociology, anthropology, or history of an appropriate art, than its theory. Another research method places a local context into the test tube of globalization. Experience shows that these two methods are applicable to different arts, places, and periods enriching the scientist with more detailed information about the era studied.展开更多
The acceleration autopilot design for skid-to-turn （STT） missile faces a great challenge owing to coupling effect among planes, variation of missile velocity and its parameters, inexistence of a complete state vecto...The acceleration autopilot design for skid-to-turn （STT） missile faces a great challenge owing to coupling effect among planes, variation of missile velocity and its parameters, inexistence of a complete state vector, and nonlinear aerodynamics. Moreover, the autopilot should be designed for the entire flight envelope where fast variations exist. In this paper, a design of integrated roll-pitch-yaw autopilot based on global fast terminal sliding mode control （GFTSMC） with a partial state nonlinear observer （PSNLO） for STT nonlinear time-varying missile model, is employed to address these issues. GFTSMC with a novel sliding surface is proposed to nullify the integral error and the singularity problem without application of the sign function. The proposed autopilot consisting of two-loop structure, controls STT maneuver and stabilizes the rolling with a PSNLO in order to estimate the immeasurable states as an output while its inputs are missile measurable states and control signals. The missile model considers the velocity variation, gravity effect and parameters＇ variation. Furthermore, the environmental conditions＇ dynamics are mod- eled. PSNLO stability and the closed loop system stability are studied. Finally, numerical simulation is established to evaluate the proposed autopilot performance and to compare it with existing approaches in the literature.展开更多
文摘The article discusses five local stories that, without being connected to each other, tell about the socio-cultural circumstances accompanying creation of works of art that have received significant (but not the highest) recognition on a global scale. The discussion concerns three songs about cities: Torna a Surriento, Moscow Nights, and Li Beirut;a famous Soviet painting Low Marks Again;and the design features of Audi cars for the US market over the past decade. The approach to each certain artifact, be it song, painting, or the design of rear turn signals, is developed on the basis of disciplinary affiliation, whereas a discipline is more sociology, anthropology, or history of an appropriate art, than its theory. Another research method places a local context into the test tube of globalization. Experience shows that these two methods are applicable to different arts, places, and periods enriching the scientist with more detailed information about the era studied.
基金co-supported by the National Natural Science Foundation of China (No.61304077)International Science & Technology Cooperation Program of China (No.2015DFA01710)+3 种基金the Natural Science Foundation of Jiangsu Province of China (No.BK20130765)the Chinese Ministry of Education Project of Humanities and Social Sciences (No.13YJCZH171)the 11th Jiangsu Province Six Talent Peaks of High Level Talents Project of China (No.2014_ZBZZ_005)the Jiangsu Province Project Blue: Young Academic Leaders Project
文摘The acceleration autopilot design for skid-to-turn （STT） missile faces a great challenge owing to coupling effect among planes, variation of missile velocity and its parameters, inexistence of a complete state vector, and nonlinear aerodynamics. Moreover, the autopilot should be designed for the entire flight envelope where fast variations exist. In this paper, a design of integrated roll-pitch-yaw autopilot based on global fast terminal sliding mode control （GFTSMC） with a partial state nonlinear observer （PSNLO） for STT nonlinear time-varying missile model, is employed to address these issues. GFTSMC with a novel sliding surface is proposed to nullify the integral error and the singularity problem without application of the sign function. The proposed autopilot consisting of two-loop structure, controls STT maneuver and stabilizes the rolling with a PSNLO in order to estimate the immeasurable states as an output while its inputs are missile measurable states and control signals. The missile model considers the velocity variation, gravity effect and parameters＇ variation. Furthermore, the environmental conditions＇ dynamics are mod- eled. PSNLO stability and the closed loop system stability are studied. Finally, numerical simulation is established to evaluate the proposed autopilot performance and to compare it with existing approaches in the literature.
