Control of Active Microvibration Isolation Equipment by Consideration of the Air Pressure Characteristics in a Tube
Control of Active Microvibration Isolation Equipment by Consideration of the Air Pressure Characteristics in a Tube
复制标题
考虑管内气压特性的主动微隔振设备控制
DOI：
10.1299/jsdd.1.129
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发表时间：
2007
期刊：
影响因子：
--
通讯作者：
M. Hayatsu
中科院分区：
文献类型：
--
作者：
S. Maekawa;M. Wada;Y. Tagawa;Shizuo Imaoka;M. Hayatsu
使用微隔振设备的应用范围正在扩展到以前未考虑振动影响的设备。作为一个代表性的例子，研究了使用空气弹簧致动器的主动微振隔离设备的应用，该设备适用于在强磁场中运行的 MRI 和 NMR。为了在强磁场中使用，主动微振隔离设备需要具有由非磁性材料制成的致动器。然而，控制执行器中气压的伺服阀必须安装在远离强磁场的地方，因为它不能由非磁性材料制成。这就需要使用长的供气管将伺服阀连接到执行器。由于该长管会影响执行器特性，因此使用传统设备模型设计的控制器无法获得足够的隔振性能。本研究通过分析主动微隔振设备的特点，提出了一种新的设备模型，并利用模型匹配技术对该模型进行了控制系统设计。通过仿真和实验验证了设备模型和控制技术。
The range of applications using microvibration isolation equipment is being extended to devices for which the influence of vibration had not previously been considered. As a representative example, the application of active microvibration isolation equipment using an air spring actuator, suitable for MRI and NMR that operate in a strong magnetic field, is examined. In order to be used in a strong magnetic field, the active microvibration isolation equipment needs to have an actuator made from a nonmagnetic material. The servo valve that controls the air pressure in the actuator, however, must be installed away from the strong magnetic field since it cannot be fabricated from a nonmagnetic material. This necessitates the use of a long air supply tube to connect the servo valve to the actuator. Since this long tube affects the actuator characteristics, adequate vibration isolation performance cannot be attained with a controller designed using the conventional equipment model. In this study, a new equipment model is proposed by analyzing the characteristics of the active microvibration isolation equipment, and the control system is designed for the model using the model matching technique. The equipment model and control technique are validated by simulation and experiment.