In order to go along the work of next generation network protocol conformance testing effectively and thorough, we bring forward a sign idea about test executing system and implement it base on Linux environment, whic...In order to go along the work of next generation network protocol conformance testing effectively and thorough, we bring forward a sign idea about test executing system and implement it base on Linux environment, which is obtained based ISO' criterion and method. The main function of test executing system is to execute automatically the test suit in TTCN form in course of protocol conformance testing and present the testing report in the end. In this paper,we first introduce the realization Idea of test executing system base on Linux environment and some interrelated arithmetic. We emphasize on the sign flow and implement procedure of test executing system and discuss some arithmetic for central module. Finally, we give test procedure and test result for IPv6 protocol using this test executing system.展开更多
A novel adaptive fault-tolerant control scheme in the differential algebraic framework was proposed for attitude control of a heavy lift launch vehicle （HLLV）. By using purely mathematical transformations, the decou...A novel adaptive fault-tolerant control scheme in the differential algebraic framework was proposed for attitude control of a heavy lift launch vehicle （HLLV）. By using purely mathematical transformations, the decoupled input-output representations of HLLV were derived, rendering three decoupled second-order systems, i.e., pitch, yaw and roll channels. Based on a new type of numerical differentiator, a differential algebraic observer （DAO） was proposed for estimating the system states and the generalized disturbances, including various disturbances and additive fault torques. Driven by DAOs, three improved proportional-integral- differential （PID） controllers with disturbance compensation were designed for pitch, yaw and roll control. All signals in the closed-loop system were guaranteed to be ultimately uniformly bounded by utilization of Lyapunov＇s indirect method. The convincing numerical simulations indicate that the proposed control scheme is successful in achieving high performance in the presence of parametric perturbations, external disturbances, noisy corruptions, and actuator faults.展开更多
文摘In order to go along the work of next generation network protocol conformance testing effectively and thorough, we bring forward a sign idea about test executing system and implement it base on Linux environment, which is obtained based ISO' criterion and method. The main function of test executing system is to execute automatically the test suit in TTCN form in course of protocol conformance testing and present the testing report in the end. In this paper,we first introduce the realization Idea of test executing system base on Linux environment and some interrelated arithmetic. We emphasize on the sign flow and implement procedure of test executing system and discuss some arithmetic for central module. Finally, we give test procedure and test result for IPv6 protocol using this test executing system.
基金Foundation item： Project（2012M521538） supported by China Postdoctoral Science Foundation Project suppolted by Postdoctoral Science Foundation of Central South University
文摘A novel adaptive fault-tolerant control scheme in the differential algebraic framework was proposed for attitude control of a heavy lift launch vehicle （HLLV）. By using purely mathematical transformations, the decoupled input-output representations of HLLV were derived, rendering three decoupled second-order systems, i.e., pitch, yaw and roll channels. Based on a new type of numerical differentiator, a differential algebraic observer （DAO） was proposed for estimating the system states and the generalized disturbances, including various disturbances and additive fault torques. Driven by DAOs, three improved proportional-integral- differential （PID） controllers with disturbance compensation were designed for pitch, yaw and roll control. All signals in the closed-loop system were guaranteed to be ultimately uniformly bounded by utilization of Lyapunov＇s indirect method. The convincing numerical simulations indicate that the proposed control scheme is successful in achieving high performance in the presence of parametric perturbations, external disturbances, noisy corruptions, and actuator faults.
