This paper proposes a two - armed push - pull inverter , including its topologies , power distributions in every switching devices and modulation schemes . the major parameters such as thd and df of this vsi are analyzed . comparison study shows that the quality of two - armed push - pull vsi is better than those of square - wave vsi . and the switching loss is lower than that of pwm scheme at same time , especially used in wide frequency range . detailed calculating formulae and experimental results are presented 该文介绍了一种双臂推挽式逆变器,包括其电路拓扑、每个开关器件的功率分布和调制策略.分析了这种电压源逆变器的主要参数,如总谐波失真度( thd )和失真指数( df ) .比较研究表明,这种逆变器的质量明显优于方波逆变器,同时开关损耗明显低于pwm调制方式,特别适用于宽频范围.介绍了计算公式和实验结果
Push - pull current mode hfl inverter also is composed of four power switches . the simulation and experiment of a 500va experimental prototype indicates that this circuit has the advantages of less components , simple topology , the ability of four quadrant operation and high efficiency . the inverter does not need the symmetry of the components " parameters and can be applied to dc to ac conversion with single low input voltage source 推挽双向电流源高频链逆变电路也是由四个功率管组成， 500va的原理样机的仿真和实验研究结果表明，该电路元器件少、电路拓扑简单、能够四象限可靠运行、变换效率高，并不要求器件参数的完全对称，适合于输入电压较低的场合。
Based theory of the fiber optic accelerometer is presented in details , according to the the principle of phase modulation a new experimental scheme is described . in this scheme , a center supported flexural disk design is chosen as the sensing mechanism , the fiber of the interferometer is attached on each side of the flexural disk , such design is helpful to the desirable features such as high acceleration sensitivity and immunity to extraneous measurands 第二章中从不同方面详细介绍了相位调制型光纤加速度计的基础理论，并由此提出了一种新型的加速度计测量方案，该方案通过在柔性盘的上下侧面粘上干涉仪双臂光纤形成推挽式系统，可以有效地消除光纤干涉仪易受温度等环境影响的缺点，并由于采用推挽方案，使灵敏度比采用单臂测量提高了一倍。
