With the continuous development of intelligent electronic technology, the intelligent embedded devices become more and more popular. While there is no unified standard for the quantitative evaluation of effectiveness of the intelligent embedded platform. For this problem, this paper proposes a comprehensive evaluation method. The evaluation factors are designed for build the evaluation model, including the hardware efficiency factors and the software efficiency factors. Then the weight of each evaluation factor are calculated through AHP algorithm and CRITIC algorithm. The experiment results show that, the method this paper proposed is more stable and suitable for the efficiency evaluation problems.
Electrical stresses were severely introduced into power device because of the high efficiency and integration for satellite power supply system. To eliminate the reverse voltage spikes of power rectifier diode, one passive RCD clamp circuit was proposed. In this paper, the oscillation for rectifier diode in transformer secondary side is analyzed based on small signal equivalent circuit's method, especially in phase-shifted full-bridge converter topology. Two kinds of RCD topological circuits were compared and analyzed, from which a more efficient clamping circuit was adopted. The calculation and selection method of clamping resistance was emphatically introduced. Finally, the converter was built and experiments were preceded. The results prove the correctness and effectiveness using the present method.
As a new work mode of Astronomy Observation satellite to achieve local sky coverage scanning, Dynamic-probe Attitude Maneuver Mode has such characteristics as complicated maneuver, real time change of attitude, higher process index and Multi-system collaborative work. It is difficult to validate the maneuver mode in the existing test environment using current test method. A System-level test scheme is designed to solve this problem. The design of test environment contains dynamic model, time unification and data analysis system. The automatic test, Multi-system validation and visualization of test system are realized. The system-level test results show that the designed scheme can verify the correctness of function and the validity of performance index, which provides ideas for ground test and on-orbit application.
Motion control, i.e. the path planning, in the unknown environment of the agent is a general interest for scholars and how to increase the efficiency of motion control is the most important point. For that, this paper puts forward a motion control method based on Dyna-Q algorithm. The motion control steps with reinforcement learning algorithm is designed and for increase the learning efficiency, a Dyna-Q framework is utilized. The experiment results show that, the method this paper proposed has more fast convergence efficiency and is more suitable for the unknown and dynamic environment to the compared methods.
How to accurately and quickly find the best redundancy switching solution of redundancy ring is an important concern for satellite service providers if a travelling wave tube amplifier(TWTA) fails in orbit.However,with the development of telecommunication satellites in the direction of large capacity and long endurance,redundancy ring is bigger and bigger,integrated redundancy rings appear,and redundancy switching solution becomes more and more complex.Traditional enumeration method is inefficient and unreliable for large ring.In this paper,a redundancy switching optimization method based on genetic algorithms is presented.This method integrates the information of switches and their positions into chromosome through coding,determines the order of goodness of chromosome through appropriate fitness calculation and makes use of the cycle of selection,crossover and mutation to simulate the natural evolution process of reproduction,competition,elimination and balance.Simulation results show that the method can accurately and promptly find the optimized solution with minimum insertion loss.
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