NCEER-95-0012 | 4/11/1995 | 114 pages
TOC: The table of contents is provided.
Keywords: Structural Control Systems, Innervated Structures, Real Time Structural Parameter Modification (RSPM), Complex Energy Theory, Functional Switches, and Earthquake Engineering.
Abstract: This report presents a structural vibration reduction system which includes control algorithms and example devices. The concept of this system is to adaptively change the physical parameters of a structure based on dynamic information such as ground motions and the structure's response to these motions. This approach is referred to as Real-time Structural Parameter Modification (RSPM). A structure implemented with RSPM capacity is called an innervated structure. An innervated structure consists of three integrated functions or components: a sensory unit to measure the dynamic signals, a decision-making unit to analyze the signals and responses of the structure with added innervating elements, and an action unit consisting of certain functional switches and/or actuators. The basic functions are self-monitoring, self-decision-making and self-tuning. The innervating action of structures is modeled after human body motion control principles, which is conceptually different from the various structural control schemes presently defined by the structural engineering community. This report presents only the basic concept and preliminary theoretical and experimental results to demonstrate the feasibility of introducing innervating actions to structures. It emphasizes a research direction to establish the necessary engineering knowledge base for the design and construction of man-made structures with features and characteristics similar to those of living systems.