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Structural heterogeneity in the vadose zone can significantly influence the dynamics of surface and subsurface distribution of water. It is one important reason for the patterned crops in fields. GPR as a non-invasive tool facilitates the quick investigation of subsurface structures and associated soil water contents of agricultural lands. A field study site with patterned wheat was surveyed at 1...
In order to realize the real-time state data monitor of the electromechanical actuator(EMA), the EMA and other subsystem establish a ground half physical experiment simulation platform based on the CAN bus. The CANoe software decodes the received EMA CAN data and showes the result in the image window. The decoding data contains the EMA current, motor operation state, EMA angle and etc. Through these...
In order to rapidly develop the control system code of the Electromachanical Actuator (EMA), the DSP development platform is established mostly based on the MATLAB, and the development metheod is researched. First, the DSP development platform archtecture in the environment of MATLAB is briefly introduced. And the principle of data exchange is showed. Then, the EMA hardware structure is necessarily...
In order to realize the digital of Electromechanical Actuator(EMA) control system, the CAN Bus, which has efficient reliable performance and flexible network modes, works as data interface. The EMA test scheme is designed based on the CAN Bus. First of all, the microcontroller DSP with the CAN Bus works as the core of the EMA control system circuit boards. Then the CAN Bus test network is established...
Under conditions of high temperature and high humidity, the moisture absorbing behavior of epoxy resin SUR-2 casting matrix for composite core was investigated, and the variation of the mechanical properties and the heat deformation temperature with hygrothermal aging were researched, The results show that the moisture-absorption behavior of the casting resin followed the Fick law. The mechanical...
A mathematical model of seeker opto-electronic platform is the basis for researching performance, designing a servo control system and simulating. Focusing on high frequencies of mechanical resonant, restriction of gimbaled axis rotation, a new model identification method was proposed under the pseudo-random invert-M-sequences. The testing signal, data acquisition, the calculating of frequency response,...
In order to apply the electromechanical actuator to tactical mini-missiles, this paper researches on the key technology such as load-bearing ability, rapidity and miniaturization of the micro-electromechanical actuator power system based on the ball screw. First, according to specific technical indexes, the power, electromechanical time constant and the size of the motors are screened originally through...
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