ABSTRACT
This chapter reviews some existing collective placement methods of both sensors and control devices for civil structures. The number and location of sensors and control devices determined by the collective placement method lay the foundation for the synthesis of structural health monitoring and vibration control in the time domain. Controllability measures the ability of the particular control device configuration to control the system states, whereas observability measures the ability of the particular sensor configuration to supply the observations for estimating the system states. Since many control algorithms are employed to determine the optimal control forces using the information measured by sensors as feedbacks, the optimal placement of control devices and sensors is inevitably related to the selected control algorithms. For the non-collocated case, the locations of control devices and sensors are usually different due to different performance indices or objective functions being used.
