Quasi-static Control Algorithms Trở lại hình 6,1, hệ thống kiểm soát cơ cấu hoạt động có 3 chính các thành phần: i) một hệ thống thu thập dữ liệu thu thập những quan sát trên kích thích và đáp ứng, ii) một bộ điều khiển xác định trạng thái của cấu trúc và quyết định một quá trình hành động và iii) thiết lập một thiết bị truyền động áp dụng hành động theo quy định của bộ điều khiển. Quá trình ra quyết định sử dụng cả thông tin về làm thế nào cấu trúc đáp ứng đầu vào khác nhau và kỹ thuật. | 479 Chapter 7 Quasi-static Control Algorithms Introduction to control algorithms Referring back to Fig an active structural control system has 3 main components i a data acquisition system that collects observations on the excitation and response ii a controller that identifies the state of the structure and decides on a course of action and iii a set of actuators that apply the actions specified by the controller. The decision process utilizes both information about how the structure responds to different inputs and optimization techniques to arrive at an optimal course of action. When this decision process is based on a specific procedure involving a set of prespecified operations the process is said to be algorithmic and the procedure is called a control algorithm . A non-adaptive control algorithm is time invariant . the procedure is not changed over the time period during which the structure is being controlled. Adaptive control algorithms have the ability to modify their decision making process over the time period and can deal more effectively with unanticipated loadings. They also can upgrade their capabilities by incorporating a learning mechanism. This text is concerned primarily with time invariant control algorithms which are well established in the control literature. Adaptive control is an on-going research area which holds considerable promise but is not well defined at this time. A brief discussion is included here to provide an introduction to the topic. The topic addressed in this chapter is quasi-static control . where the 480 Chapter 7 Quasi-static Control Algorithms structural response to applied loading can be approximated as static response. Since time dependent effects are neglected stiffness is the only quantity available for passive control. Active control combines stiffness with a set of pseudo-static control forces. The quasi-static case is useful for introducing fundamental concepts such as observability controllability .
