浮筏隔振系统的半主动开关控制

Semi-active switch control of floating raft isolation system

为改善浮筏隔振系统的隔振效果,引入半主动控制技术,建立浮筏隔振系统的半主动控制动力学模型,以减小筏体传递至基础的力为控制原则,提出筏体位移最小算法;以激振力做功对浮筏隔振系统输入的能量最小为控制原则,提出输入能量最小算法.利用Matlab软件建立Simulink仿真模型,对两种开关算法及无开关控制进行了仿真分析;搭建试验系统,对两种开关算法及无开关控制进行了试验研究.仿真分析的结果和试验研究的结果具有较好的一致性,均表明:采用筏体位移最小算法和输入能量最小算法对浮筏隔振系统进行半主动开关控制,可显著地抑制系统在共振频率附近的基础振动加速度响应.

It is an effective mean to improve the vibration isolation performance of floating raft system by applying semi-active control on the floating raft.The semi-active control algorithms of floating raft isolation system are studied in this paper by establishing the dynamic model,a minimum raft displacement algorithm is proposed based on the principle of reducing the force passed to base,and a minimum input energy algorithm is proposed based on the principle of minimize the energy input to the floating raft isolation system.The simulation models are built by the Matlab software,the vibration isolation performances of semi-active floating raft using two control algorithms and the floating raft without control are simulated.A floating-raft isolation semi-active switch control test system is establish,and the vibration isolation performances of semi-active floating raft using two control algorithms and without control are tested.The simulation and test results show that the base acceleration response of semi-active floating raft near the resonant frequency can be suppressed by using the minimum raft displacement algorithm and the minimum input energy algorithm.