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In order to achieve the integration of ac/dc output in the aircraft power system, a novel single-input/dual-output indirect matrix converter (IMC) is proposed in this paper. Based on the fact that a real dc-link is formed in IMC, the proposed topology realizes dc output by inserting a simple two transistor forward converter (TTFC) into the dc-link. Its modulation strategy is composed of two parts,...
Low temperature cofired ceramic (LTCC) is an effective method to realize the miniaturization, high reliability and low cost for microwave and high-frequency devices. In the paper, a miniaturized 3 dB LTCC coupler using lumped elements is proposed based on the even-odd decomposition method for the built of image-reject mixer (IRM) in receiver systems. With a novel and compact structure, the coupler...
Epoxy resin insulation affects the stress distribution inside a superconducting coil. In this study, the effect of insulation was calculated by adopting an improved wire dynamic simulation method. A real Nb3Sn coil was used as an example. The strain distribution was obtained by calculating the motion of the wires and the forces applied on each wire. The strain distribution was compared with that obtained...
Considering the demand on energy savings in future wireless networks, consumptions on cooperative links between different base stations becomes more and more critical with the rapid development of wireless communication systems. Coordinated Multi-Point Transmission/Reception (CoMP) gradually becomes popular due to the demand of higher transmission rate and more reliable Quality of Service (QoS), but...
Dimension of solder interconnects (or joints) and pitches has been continuously scaling down, resulting in inhomogeneous microstructure and severe electromigration (EM) effect in solder interconnects. In this study, the interaction effect between electromigration and microstructure evolution in ball grid array (BGA) structure Cu/Sn-58Bi/Cu solder interconnects under a direct current density of 1.5×10...
For the missile-target relative motion equations in the two-dimensional plane, a sliding mode guidance law design problem with terminal line-of-sight angle constraints in maneuvering target intercept is investigated in this paper. The attack angle constraints are transformed into line-of-sight angle constraints. A finite-time convergent linear sliding mode surface including the desired line-of-sight...
Dimension of solder interconnects (or joints) and pitches has been continuously scaling down, resulting in inhomogeneous microstructure and severe electromigration (EM) effect in solder interconnects. In this study, the interaction effect between electromigration and microstructure evolution in ball grid array (BGA) structure Cu/Sn-58Bi/Cu solder interconnects under a direct current density of 1.5×10...
The wireless sensor network (WSN) is one new hot spot for both research and industry. However, the energy problem has been becoming a challenge in practical applications for WSN because the sensor nodes are supplied with energy by batteries which are difficult to be recharged and replaced. So many researches are taken on reducing the energy consumption of WSN nodes. Medium Access Control (MAC) layer...
Instantaneous values of input line-to-line voltages control method is one of the important control strategies for matrix converter. By using this control method the compensation of the asymmetrical input source voltages is easily achieved. However, many researchers focus on pursing a new control strategy for this method due to the complexity of the previous control strategy and difficulty of its realization...
A kinematic model of tracked vehicles is established in this paper, in which both longitudinal and lateral slipping is considered and processed as three time-varying parameters. Unscented Kalman filter is then introduced to real time estimate the pose and slipping parameters jointly. A stable tracking control law for this nonholonomic system is proposed and the asymptotic stability is guaranteed by...
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