Recent advances in control algorithms for smart structures and machines

Abstract

This paper presents a state‐of‐the‐art review of recent control algorithms used primarily for vibration control of smart structures and machines. Control algorithms can be divided into open loop, feedback, feedforward, and combined feedback and feedforward control. Solutions proposed can be subdivided into (a) classical control, (b) optimal control, (c) robust control, (d) intelligent control, and (e) self‐sustaining solutions and energy harvesting used in centralized and decentralized configurations. The most recent research on novel autonomous control systems intersects distributed control theory, agent‐based modeling, bioinspired computational learning, and optimization algorithms.

An integrated damping system for tall buildings

“…These are active, semi-active, and hybrid systems. [57] While active systems can effectively mitigate most of the disadvantages of conventional TMDs, with considerable recent improvements in their control algorithms to improve their response, [58][59][60][61][62][63][64][65][66] they typically result in a higher cost and require a large source of external power, which makes them less reliable and practical. To overcome this last detriment, semi-active systems are devised to require only a minimum amount of external energy.…”

Decentralized Controller Robustness Improvement Using Longitudinal Overlapping Decomposition - Application to Web Winding System

“…By comparing (11), with (12), we can find expansion conditions for linearized (14) The system (12) is an expansion of the system (6) (or system (6) is contraction of system (12)) if there exist transformation matrices and T G satisfying (13) and (14) such that for any initial states ( ) e e (0), (0) X X  and for any…”

“…Moreover, robust multivariable controllers, recently proposed for this application ( [1], [3], and [8]), are only powerful for reduced size systems. Robust decentralized overlapping output feedback control strategy is proposed in [11] for large scale systems; the load frequency controller designed with the presence of generation rate constraints and time varying delays, it guarantee the stability of the closed-loop system, the effectiveness of this approach is demonstrated through simulation results of a multi-area interconnected power system [11], it is an innovative strategy for winding systems, it is based on large scale control strategies without the inconvenient of having too many inputs and outputs for one controller [12]. Our work aims to improve decentralized controller robustness using overlapping decomposition applied to web winding system model; this strategy is based on decoupling the systems' model into lower interconnected subsystems that can be stabilized locally, and then conclude about global stability.…”

Pavement Crack Width Measurement Based on Laplace's Equation for Continuity and Unambiguity

“…Integrated with some of the existing crack extraction algorithms, the proposed method has the capacity to be further applied in the in‐service pavement instead of monitoring the specimen in the lab, so that long‐term pavement crack width propagation behaviors can be studied using time series of pavement sensing data. In addition, the proposed method is also feasible to complement the existing structural analysis tools using emerging signal processing and feature extraction (Amezquita‐Sanchez and Adeli, ; Gutierrez Soto and Adeli, ; Li et al., ) to facilitate an intelligent inspection and monitoring of many other critical infrastructures, such as bridges, dams, high‐rise buildings, etc.…”