The experiment is carried out on a rolling platform whose rolling period can be adjusted continuously 在最大摇摆角度为30 ,摇摆周期连续可调的摇摆台上进行了实验研究。
The steady frequency three - phase ac can be changed into the ac which frequency is continuously adjusted in the experiment unit composed of rectifier , inverter , control circuit , and relay safeguard circuit Spwm三相变频实验单元能够把频率固定的三相交流电变换成频率连续可调的三相交流电,它主要包括交直变换、逆变、控制和继电保护电路。
Magnetorheological dampers are semi - active control devices , which have the virtue of quick response , excellent stability and continually changing their state , and are a promising type of devices on structure vibration reduction 磁流变液体阻尼器作为一种用于半主动控制的作动器,具有响应快、稳定性好且能连续可调的优点,成为结构减振控制中新一代的控制元件。
Avm is essentially a precision array film attenuator , which has a big diameter , high power load , continuous adjustment . the gain of each beam of the main amplifiers is controlled independently by the adjusting the angle of each cell of avm Avm实质上是大口径、高功率负载、透过率连续可调的组合式精密薄膜衰减器,通过调节avm各单元偏转角度大小来独立控制住放大器各路的增益。
Together with the test of its basic performance , a programmable filter using the designed chip and two saw filters , whose center frequency and bandwidth can be adjusted , is also built and tested . the test results show that , the minimum insertion loss is - 5 . 2 - 10 . 5db , with the maximum isolation loss lying between - 40 . 5 - - 23 . 4db , and the maximum continually tunable dynamic range is 21 . 3db , from 50mhz to 250mhz 测试结果表明:在50 250mhz的工作频段内,该电路导通时最小插入损耗约为- 5 - 10 . 5db ,关断时隔离度可达- 40 . 5 - 23 . 4db左右;其连续可调的加权动态范围最大值为21 . 3db 。