5.1.2优缺点和应用范围Advantages，disadvantagesandapplicationExistingproblems（4）能量输入问题；input of energy（5）经济性问题；economicalproblem（6）系统装置的日常维护问题。Thedailymaintenanceofsystemapplicationit is mainly applied in the vibration control of the followingstructures under wind,earthquake and environmental excitation（1）高层、超高层建筑；high-riseandsuperhigh-risebuilding（2）高算塔架或特种结构；high-risetowersorspecialstructures（3）桥梁或其他大跨度结构；bridgesandotherlarge-spanstructures（4）生命线工程结构。Lifelineprojects
5.1.2 优缺点和应用范围 Advantages, disadvantages and application Existing problems （4）能量输入问题；input of energy （5）经济性问题；economical problem （6）系统装置的日常维护问题。The daily maintenance of system application it is mainly applied in the vibration control of the following structures under wind, earthquake and environmental excitation （1）高层、超高层建筑；high-rise and super high-rise building （2）高耸塔架或特种结构；high-rise towers or special structures. （3）桥梁或其他大跨度结构；bridges and other large-span structures （4）生命线工程结构。Lifeline projects
5.2结构主动控制的减震机理和系统组成The mechanismandcomponents of structural activecontrolsystem5.2.1Mechanism of structural active controlthe mechanism and components of the system is introduced by taking thetypical active control system——active mass damper (AMD) as anexample.n个自由度的线性结构，采用主动减震控制结构体系。在地震激励下的运动方程为：The Linearstructurewith n DOF adopts active vibrationcontrol systems,itsequationofmotionis:Mx +Cx +Kx=Fx_+ EUSupposethattheopen-closed loopconfigurationisused inwhichthecontrol force Uisdesigned tobe a linearfunctionofthemeasureddisplacement vector x, the velocity vector and the ground acceleration.The control force vectortakes theform:U=K,x+C,x+Fxg
5.2 结构主动控制的减震机理和系统组成 The mechanism and components of structural active control system 5.2.1 Mechanism of structural active control the mechanism and components of the system is introduced by taking the typical active control system——active mass damper (AMD) as an example. n个自由度的线性结构，采用主动减震控制结构体系。在地震激励下的运动 方程为： The Linear structure with n DOF adopts active vibration control systems, its equation of motion is: Suppose that the open-closed loop configuration is used in which the control force U is designed to be a linear function of the measured displacement vector x, the velocity vector and the ground acceleration. The control force vector takes the form: Mx Cx Kx Fx EU g U K x C x F x b b b g