换能器与作动器同层布置时的无能源主动控制
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摘要
提出了一种将换能器与作动器布置于结构中同一层的无能源主动控制方案 ,建立了数学模型 ,并提出了相应的控制策略 .这种控制方案继承并发展了无能源主动控制的思想 ,使得在配备合适的蓄能器的条件下 ,能达到或接近主动控制的效果 .其原理是当主动控制力由变阻尼控制力实现时 ,利用“换能器”实现该控制力 ,同时将结构的一部分振动能量转换为液压能 ,并储存于蓄能器中 ;当主动控制力不能由变阻尼控制力实现时 ,由作动器利用存于蓄能器中的高压油作为能源 ,进行主动控制 .对一个 8层结构进行了数值仿真 ,结果表明 ,无能源主动控制在不配备外部能源的情况下 ,可以达到或接近主动控制的控制效果 .
A new control scheme of ACWPS (active control without power supply), which takes some advantages of active control while it overcomes the drawbacks of conventional active control system which needs high pressure oil as power supply and so it has high control cost and it's difficult to assure its working reliability. In the new plan of ACWPS, the transducer and actuator are placed on the same floor. The new plan of the ACWPS works on an elaborate control strategy. If the active control force could be exerted with the variable damper, it is performed with the transducer while the transducer converts part of the vibration energy of the structure to high pressue oil and stores them in an energy accumulator. If it is impossible to be performed with the transducer, the active control force is exerted with the actuator using the stored pressure oil as power supply. Simulation results demonstrate that the new ACWPS plan can approach the active control performance without external power supply.
A new control scheme of ACWPS (active control without power supply), which takes some advantages of active control while it overcomes the drawbacks of conventional active control system which needs high pressure oil as power supply and so it has high control cost and it's difficult to assure its working reliability. In the new plan of ACWPS, the transducer and actuator are placed on the same floor. The new plan of the ACWPS works on an elaborate control strategy. If the active control force could be exerted with the variable damper, it is performed with the transducer while the transducer converts part of the vibration energy of the structure to high pressue oil and stores them in an energy accumulator. If it is impossible to be performed with the transducer, the active control force is exerted with the actuator using the stored pressure oil as power supply. Simulation results demonstrate that the new ACWPS plan can approach the active control performance without external power supply.
引文
[1 ]孙作玉 .变阻尼半主动结构控制 [D].哈尔滨 :哈尔滨建筑大学 ,1 998.
[2 ]孙作玉 ,刘 季 .结构振动的无能源主动控制 [J].地震工程与工程振动 ,1 999( 3) .
[3]何存兴 .液压元件 [M].北京 :机械工业出版社 ,1 981 .
[2 ]孙作玉 ,刘 季 .结构振动的无能源主动控制 [J].地震工程与工程振动 ,1 999( 3) .
[3]何存兴 .液压元件 [M].北京 :机械工业出版社 ,1 981 .
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