scholarly journals DYNAMIC BEHAVIOR OF A WOOD FRAME WITH SHEAR LINK PASSIVE CONTROL MECHANISM INVOLVING K-BRACE

2005 ◽  
Vol 70 (598) ◽  
pp. 51-59 ◽  
Author(s):  
Kazuhiko KASAI ◽  
Hiroyasu SAKATA ◽  
Akira WADA ◽  
Takeshi MIYASHITA
Keyword(s):  
Dynamic Behavior ◽  
Passive Control ◽  
Control Mechanism ◽  
Shear Link ◽  
Wood Frame

A Review of Smart Material and Vibration Control for Civil Engineering Structure

2012 ◽  
Vol 204-208 ◽  
pp. 4097-4100 ◽  
Author(s):  
Li Ping Qin ◽  
Yuan Jun Yan
Keyword(s):  
Vibration Control ◽  
Structural Control ◽  
Passive Control ◽  
Control Mechanism ◽  
Smart Material ◽  
Structural Vibration ◽  
Active Structural Control ◽  
Shock Resistance ◽  
Resistance Performance ◽  
Research Frontiers

Intelligent control for structural vibration is the international research frontiers in vibration control. The intelligent material and intelligent adjustable dampers and smart material actuator has the advantages of simple structure, easy adjustment, small energy consumption, driving the rapid response, almost without delay, in active structural control, semi-active control and passive control, has broad application prospects. The actuator is setted on the structure as a control mechanism, the control mechanism and the structure resist the vibration dynamic loads together, reduce the dynamic response of structure, improve the shock resistance performance of the structure.

Control of Active Above-Knee Prostheses Through Electromyography

2010 ◽  
Author(s):  
Sai-Kit Wu ◽  
Garrett Waycaster ◽  
Xiangrong Shen
Keyword(s):  
Passive Control ◽  
Control Mechanism ◽  
Knee Prostheses ◽  
Direct Control ◽  
Volitional Control ◽  
Human Motor Control ◽  
Control Approach ◽  
Human Motor ◽  
Motion Intention ◽  
Passive Model

This paper describes a new electromyography (EMG) based control approach for powered above-knee prostheses. In the proposed control approach, the EMG signals are utilized as the direct control commands to the prosthesis, and thus enable the volitional control by the wearer, not only for locomotive functions, but for arbitrary motion as well. To better integrate the AK prosthesis into the rest of the human body, the control approach incorporates a human motor control mechanism-inspired ‘active-passive’ model, which combines an active control component that reflects the wearer’s motion intention, with a passive control component that implements the controllable impedance critical to the safe and stable interaction with the environment. The effectiveness of the proposed control approach was demonstrated through the experimental results for arbitrary free swing and level walking.

scholarly journals Enhancing the Classical Closed-Loop Algorithm in terms of Power Consumption

2015 ◽  
Vol 2015 ◽  
pp. 1-9
Author(s):  
Rahman Mirzaei ◽  
Seyed Sina Kourehli
Keyword(s):  
Closed Loop ◽  
Passive Control ◽  
Control Mechanism ◽  
Scalar Function ◽  
Control Force ◽  
Time Varying ◽  
External Excitation ◽  
Average Control ◽  
Control Forces ◽  
Selection Of

An approach is suggested to reduce the peak and average control forces of actively controlled structures. In this method, responses of an actively controlled building should be much smaller than the responses of the same building controlled by the similar passive control mechanism. This approach leads to a time varying gain matrix, which is not restricted by external excitation but it is related to the selection of a scalar function. Extensive numerical analyses by using various scalar functions show that the proposed strategy effectively can reduce the need of the required control force consumptions.

Modeling and Controlling the Dynamic Behavior of an Aerial Manipulator

2021 ◽  
pp. 2150044
Author(s):  
Zain Anwar Ali ◽  
Li Xinde
Keyword(s):  
Dynamic Behavior ◽  
Control Algorithm ◽  
Degrees Of Freedom ◽  
Control Mechanism ◽  
Hybrid Control ◽  
External Noise ◽  
Pole Placement ◽  
Aerial Manipulator ◽  
Aerial Vehicle ◽  
Model Reference Adaptive

Unmanned Aerial Vehicles (UAVs) installed with a gripper is an effective and robust way to grab the wanted object from inaccessible locations. In this study, we develop a novel control mechanism to regulate the nonlinear dynamics of the aerial manipulator. In this research, hex-rotor UAV is chosen in order to fulfill the mission requirement in terms of size and weight of the object. It is equipped with a manipulator and the gimbal-based camera that will help to see the desired object and then transport it. The aerial vehicle has six-degrees-of-freedom (6-DOF) and the installed manipulator has 4-DOF which in total makes the 10-DOF aerial manipulator vehicle. At the time of clutching the desired object to eliminate or reduce the external noise, and stabilize the dynamic behavior of the aerial manipulator, we need a robust and efficient controller. To solve the aforementioned problems, this study develops a hybrid control mechanism that tracks and controls the altitude and attitude of UAV after clutching the desired object. The main contribution of this study is to design a control mechanism that includes Model Reference Adaptive Control with an Integrator (MRACI) in conjunction with regulation, pole-placement and tracking (RST) control algorithm. On one hand, the simulation results using MATLAB demonstrate the efficiency of the proposed control mechanism. On the other hand, to cross verify the validity of the proposed control algorithm, we perform the experiment by clutching the desired object at hovering and normal flight operation.

Optimization of the dynamic behavior of vehicle structures by means of passive interface controls

2016 ◽  
Vol 24 (3) ◽  
pp. 466-491 ◽  
Author(s):  
Xingrong Huang ◽  
Louis Jézéquel ◽  
Sébastien Besset ◽  
Lin Li
Keyword(s):  
Dynamic Behavior ◽  
Degrees Of Freedom ◽  
Passive Control ◽  
Dynamic Performance ◽  
Synthesis Method ◽  
Optimal Solution ◽  
Kriging Interpolation ◽  
Objective Functions ◽  
Modal Synthesis ◽  
Acoustic Comfort

As a form of passive control, padding rubber layers onto the most heavily deformed zones of a system can improve the dynamic behavior and the acoustic comfort of a vehicle system. This paper proposes an extensive hybrid modal synthesis method in order to study coupled fluid-structure systems, in retaining a few degrees of freedom. Modal criteria, corresponding to noise transmission paths between substructures in the system, have been derived to characterize the dynamic phenomenon from a modal view. These criteria were then substituted by Kriging interpolation models to avoid prohibitive simulation steps during optimization of the complex system. Once the mathematical models of the investigated modal criteria were established and the multi-objective functions for rubber characteristics defined, an approximate optimal solution leading to superior dynamic performance could be obtained based on a genetic algorithm. The analytical results and numerical experiments conducted have also justified the efficiency of our proposed strategy.

scholarly journals RESEARCH FOR APPLICATION OF SHEAR LINK TYPE FRICTION DAMPERS TO WOOD FRAME CONSTRUCTION

2020 ◽  
Vol 26 (62) ◽  
pp. 97-102
Author(s):  
Ryoichi SATOMI ◽  
Naoya GOTO ◽  
Yoshikatsu SAITO ◽  
Hideyuki NASU
Keyword(s):  
Friction Dampers ◽  
Shear Link ◽  
Link Type ◽  
Wood Frame ◽  
Frame Construction
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