Search

Speed is the core elements in table tennis athletics, however speed is lack of strength of the attack and lethality is limited, it is only with the aid of a force and speed of rotation to achieve the kill is the most optimized techniques. From the ping-pong rotating force, to elaborate the table tennis increased rotational mechanics principle and cause analysis, through the analysis of principles, deep space to carry out the table tennis rotating mechanical three-dimensional analysis, which provides a scientific theoretical basis and practical way for the table tennis rotation technique, its techniques can enhance new active exploration.

This paper investigates a frequency coordination control strategy for islanded microgrid. The dynamic process is divided into three levels including the dynamic support, droop control and zero error regulation. The control strategy is classified into primary and secondary frequency regulation. Simulation is performed on DIgSILENT and the results verify the effectiveness of the proposed control strategy and improve the performance of system frequency regulation.