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The underactuation of the standard quadrotor(four independent control input versus six output) is a serious problem which can be solved by tilting four rotors. The steering wheel is installed on each axle of the original quadrotor so that the quadrotor turns into an actuation system(eight-input versus six-output). In this paper, the dynamic model of the tilt-quadrotor is established, and the validity...
In this paper, the distributed consensus algorithm is proposed to solve the power compensation problem of transmission losses with energy storage systems in a microgrid. Due to the transmission losses, the total power between electrical machines and loads may be not balanceable, the redundant or absent power must be used to charge or discharge the energy storage systems, which is vital to ensure the...
We study the problem of distributed state estimation over adaptive networks, where agents collaborate to estimate a common state parameter vector. If the sensing target area is too large or we want to improve the convergence speed of a large adaptive network, single-level diffusion algorithms do not have better performance, so we study the multi-level diffusion Kalman filter algorithm where a network...
In this paper, system framework for UAV formation collision avoidance is proposed. Key modules of the framework are identified including collaborative sensing, threat assessment, formation reorganization, path planning and maneuver control. Their corresponding mathematical models are also established for performance optimization. The formation collision avoidance is finally formulated as a combined...
The paper highlights a way to introduce memristive components into the filter circuit. In light of memristor and memcapacitor, a novel low pass filter circuit (LPF) is presented. First, inspired by the typical RC-LPF and the Memristor-C-LPF, a novel Memristor-Memcapacitor-LPF is designed. Then transfer function of the LPF is obtained, and the amplitude-frequency response, phase-frequency response...
A novel initial descent guidance law based on the transition function is proposed for the hypersonic glide vehicle without offline nominal angle of attack (AOA) design and online iteration process. Considering the variation of the gravitational acceleration, a new transition condition between the initial descent phase and the quasi-equilibrium glide phase is deduced. Afterwards, the initial descent...
A stratospheric airship is difficult to achieve long duration flight at about 20km altitude at mid or low latitudes, where it endures pressure changes due to the heating and cooling of the day-night cycle. In order to overcome these difficulties, this paper proposed a novel stratospheric airship based on triple-gasbag principle, and investigated its static and dynamic behavior. Firstly, this paper...
In this paper, a robust control method is proposed for a class of fractional-order nonlinear system with unknown system parameter based on Lyapunov direct method. The Caputo definition is used to describe the fractional-order dynamic system. The controller is simple and enables asymptotically stability to be achieved without the computation of the conditional Lyapunov exponents. Finally, simulation...
Gas turbine starter is an important component of aero-engine gas turbine starting system, and its performance directly affects the starting ability of aero-engine. In order to meet the requirements of starter power for different types of large engines and to provide theoretical basis for modification of starters, this paper pays attention to the performance of a gas turbine starter and its fuel control...
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