基于区域极点配置的隔震换能控制

Isolation and transducer control based on region pole placement

隔震换能控制系统是一种新型半主动控制方式,具有隔震换能和主动控制的双重功能,既避免了传统主动控制需要提供主动控制能源所带来的控制成本高、可靠性不易保障的问题,又克服了传统半主动控制控制力局限性较大,影响控制效果的不足.理论分析及试验研究表明,换能器的换能效率与其相对位移、蓄能器的参数等因素有关.将隔震换能装置布置于隔震层,并将控制器安装在结构的顶层,以提高换能效率和结构的控制效果.采用区域极点配置,应用线性矩阵不等式求解方法,设计了便于工程应用的鲁棒控制器,兼顾了系统不确定性因素的影响和控制性能指标的要求.

Isolation and transducer control is a new semi-active control scheme that has energy transform and ac- tive control functions. The conventional active control is expensive as it needs sustainable energy supply and this may cause some unreliable problems. The ITC system overcomes such limitations by using a transducer to trans- form part of the vibration energy of the building into hydraulic energy and store them in an accumulator as con- trol power. The available control forces for a common semi-active control system are constrained by their relative velocities, and this deteriorates the control performance. The ITC system is not influenced by such factors and can carry on active control with the transformed hydraulic energy. Theoretical analysis and experiments demon- strate that the energy transform efficiency of the transducer depends on its relative displacement and some factors of the accumulator. To improve the energy transform efficiency and control effort, the transducer is placed on the base isolation floor while an actuator is mounted on the top. A robust controller is designed using region pole placement and Linear Matrix Inequalities （LMI） method. The control scheme is feasible for engineering appli- cation through a control strategy considering corporately the system uncertainties and control performance.