Động lực cho điều khiển chuyển động cấu trúc Hạn chế của thiết kế kết cấu thông thường Các văn bản, thiết kế, có hai ý nghĩa. Khi được sử dụng như một động từ được định nghĩa là hành động tạo ra một mô tả của các tạo tác. Nó cũng được dùng như một danh từ, và trong trường hợp này, định nghĩa là đầu ra của hoạt động này, ví dụ, mô tả. Trong văn bản này, cấu trúc thiết kế được coi là một hoạt động có liên quan trong việc xác định trang điểm vật lý của hệ thống cấu trúc | 1 Chapter 1 Introduction Motivation for structural motion control Limitations of conventional structural design The word design has two meanings. When used as a verb it is defined as the act of creating a description of an artifact. It is also used as a noun and in this case is defined as the output of the activity . the description. In this text structural design is considered to be the activity involved in defining the physical makeup of the structural system. In general the designed structure has to satisfy a set of requirements pertaining to safety and serviceability. Safety relates to extreme loadings which are likely to occur no more than once during a structure s life. The concerns here are the collapse of the structure major damage to the structure and its contents and loss of life. Serviceability pertains to moderate loadings which may occur several times during the structure s lifetime. For service loadings the structure should remain fully operational . the structure should suffer negligible damage and furthermore the motion experienced by the structure should not exceed specified comfort limits for humans and motion sensitive equipment mounted on the structure. An example of a human comfort limit is the restriction on the acceleration humans begin to feel uncomfortable when the acceleration reaches about . A comprehensive discussion of human comfort 2 Chapter 1 Introduction criteria is given by Bachmann and Ammann 1987 . Safety concerns are satisfied by requiring the resistance . strength of the individual structural elements to be greater than the demand associated with the extreme loading. The conventional structural design process proportions the structure based on strength requirements establishes the corresponding stiffness properties and then checks the various serviceability constraints such as elastic behavior. Iteration is usually necessary for convergence to an acceptable structural design. This approach is referred to as .
