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This article takes the two-stage screw type solar array which has multi-deployment and lock function as a study object, and simplifies the joint hinge as rotation vice according to the transmission order of multi-deployment and lock joint hinge. Based on the kinematics characteristic analysis of solar array's deployment and the Kane dynamic equation, the dynamics analysis model of solar array's deployment...
Partial shading has been identified as a major cause of reducing energy yield in a large solar photovoltaic array (SPVA). Partial shading may be due to due to tree leaves falling over it, birds or bird litters on the array, shade of a neighboring construction, passing clouds etc. Under partial shaded conditions the PV characteristics get more complex with multiple peaks. It is important to understand...
Field-programmable gate arrays (FPGA) are drawing increasing interest because of its performance, power consumption and configurability. They execute wide range of parallelizable algorithms which changes in accordance to variations in wireless channel statistics are utilized in smart antenna array embedded systems. In this article, we've described the FPGA implementation of a QRD processor that enables...
The effective design of semiconductor memory pertaining to the power consumption, speed and area penalty has always been the crucial task in embedded computing applications. The work presented in this paper is exact and innovative mathematical model based implementation of 32 kb SRAM optimized for power and speed. The model has been developed for a cell, array, and pre-charge, I/Os and periphery devices...
We present and validate an enhanced analytical queueing network model of zoned RAID. The model focuses on RAID levels 01 and 5, and yields the distribution of I/O request response time. Whereas our previous work could only support arrival streams of I/O requests of the same type, the model presented here supports heterogeneous streams with a mixture of read and write requests. This improved realism...
In order to test the performance and reliability of solar power system of satellites, solar array simulator on earth is needed. Based on the solar cellpsilas mathematic model, this paper designs a practical solar array simulator which can generate the solar cellpsilas I-V character. Since the implemented solar array simulator has the same structure and power as the real system, it can simulate the...
Photovoltaic cell is a kind of DC current power with non-linear characteristic, and its output power varies with module temperature, solar isolation and loads. With the disadvantage of high cost, low transfer efficiency, it's necessary to track the MPP of the PV array all the time in order to improve the system efficiency. According to the mechanism and control adaptive MPPT method based on fuzzy...
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