A novel Z-source three-level inverter based on coupled inductors is proposed. The two inductors in traditional Z-source impedance network are replaced by two coupled inductors. The operating principle is described and the equations of boost factor and voltage stresses are deduced. Comparisons are made with other Z-source three-level inverters, especially the multicell switched inductor Z-source three-level inverter. The two topologies have same boost factor if a specific condition is met, but the proposed inverter uses less components and therefore the reliability is improved. SVPWM method for conventional three-level NPC inverter is easy to apply to the novel inverter after a simple modification. Simulations are conducted to verify the theoretical analysis.

For the problem of actuator limitation in the control of aspirating hypersonic vehicle (AHV), this paper proposes a control strategy combined fuzzy approximation system with adaptive control. Firstly, the system is divided into velocity subsystem and altitude subsystem. Then, a new control law is designed. Finally, the uncertainty of the system is estimated based on the universal approximation theory of fuzzy system. This control strategy can both allow the control system with better robustness, and a good restraining effect for the uncertain disturbance. As shown from the simulation results, the method proposed in this paper has more stable than the traditional method in different situations and verifies the effectiveness of the control strategy.

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