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This paper mainly focused on the Drag free control system design based on the relative motion description. In this paper, the state space description model of the dynamics of the drag free satellite was established. Based on the analysis of controllability and observability, the state feedback control law was designed. Finally, considering the micro thruster configuration and output characteristics,...
The physical simulation of space interception with two high-speed spacecrafts is often executed on an area-limited marble platform, which could not imitate the high relative speed between two spacecrafts under the accuracy requirement of positions and movements. This paper presents the nonlinear similarity theory which is described under the architecture of the nonlinear geometrical and time-variant...
Safety and efficiency are significance for carrier aircrafts landing. One way to enhance the safety and efficiency level of the landing mission is to optimize the landing sequence. The paper mainly focuses on the carrier aircraft landing sequencing problem. In order to reduce the delay time and cost as excepted, build the optimization mathematical model, a detailed description of the design and procedure...
The physical ground simulation of space defense confrontation is under the contractible time and space coordination of real world. The theoretical foundation of simulation is determined by the uniform constrains that ensured the similarities of geometrical and physical quantities mapping in the two spaces. Under the architectures of space vector linear similarity and time uniform elapse, the sufficient...
The effect of the irregular air-water interface on the performance of the down-link quantum key distribution from the air to the sea is studied. Based on the analysis of the relationship between the incident angle and the quantum bit error rate, the air-water interface model with wind speed is adopted, the influence of the wind speed on the incident angle of the photon is discussed, the relationship...
A permeation theoretical model is proposed based on competitive adsorption for estimating the permeation effect on the stored vacuum electronic devices (VED) surrounded by mixture gases, in which the parameters are determined by experimental results. The life expectation that the pressure inside a stored VED rises to the critical value, induced by permeation, is also set up based on the model. As...
A variable structure control scheme based on nonlinear disturbance observer is proposed for the position control of the stratospheric airship according to the uncertainties of its attitude control system. Firstly, the mathematic model of the pitch channel in stratospheric airship is built by considering the uncertainties including system model error and disturbance under the flight environment. Secondly,...
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