Structural control using a deployable autonomous control system

2017 ◽  
Vol 1 (3) ◽  
pp. 306-326 ◽  
Author(s):  
Kevin Goorts ◽  
Stephen Phillips ◽  
Ali Ashasi-Sorkhabi ◽  
Sriram Narasimhan
Keyword(s):  
Control System ◽  
Structural Control ◽  
Autonomous Control

Experimental Demonstration of Precision Control of a Deployable Optics Structure

2002 ◽  
Vol 124 (3) ◽  
pp. 441-450 ◽  
Author(s):  
R. Scott Erwin ◽  
Karl Schrader ◽  
Ruth L. Moser ◽  
Steven F. Griffin
Keyword(s):  
Control System ◽  
Structural Control ◽  
Level Control ◽  
Precision Control ◽  
Research Issues ◽  
Optical Surfaces ◽  
Point Tracking ◽  
High Bandwidth ◽  
And Performance ◽  
System 1

This paper presents the development, design, and implementation of a precision control system for a large, sparse-aperture space-deployable telescope testbed. Aspects of the testbed and laboratory environment relevant to nanometer-level control and performance objectives are provided. There are four main objectives of the control system: 1) reduction of natural resonances of the supporting structure, 2) rejection of tonal disturbances, 3) tip, tilt, and piston set-point tracking for optical surfaces, and 4) reduction in settling time of optical surfaces after an impulsive slew-type disturbance. The development of a three-input, three-output, high-bandwidth structural control system for the testbed is presented, and experimental data demonstrating that all objectives were attained is provided. The paper concludes with a discussion of the results and a description of research issues remaining to be addressed.

Mitigating Pedestrian Bridge Motions Using a Deployable Autonomous Control System

2019 ◽  
Vol 24 (1) ◽  
pp. 04018101 ◽  
Author(s):  
Ali Ashasi-Sorkhabi ◽  
Kevin Goorts ◽  
Oya Mercan ◽  
Sriram Narasimhan
Keyword(s):  
Control System ◽  
Autonomous Control ◽  
Pedestrian Bridge

scholarly journals Review on vibration control in tall buildings: from the perspective of devices and applications

2020 ◽  
Author(s):  
BG Kavyashree ◽  
Shantharam Patil ◽  
Vidya S. Rao
Keyword(s):  
Control System ◽  
Active Control ◽  
Structural Control ◽  
Passive Control ◽  
Hybrid Control ◽  
Tall Buildings ◽  
Effective Control ◽  
Earthquake Load ◽  
History Of ◽  
External Loads

AbstractPermanent construction has evolved from the Palaeolithic age to today’s skyscrapers. Constructing the structure, which promises occupants safety, has become a concern because of the uncertainties in nature. Therefore in recent years, attention has been given to the development of structural protective devices that could take care of the external loads. Structural control against the wind and earthquake load has been seriously studied where the structure behaves differently for wind and earthquake load has been briefly discussed in this paper. Initially, paper discusses the history of the construction and the passive control system, which was used in structural control, is briefly discussed in this paper. Also, the implementation of active control has been discussed which was introduced later in the structural control for more effective control. But the limitations of the passive and active control system have introduced semi-active control and also the hybrid control strategy. The two mechanisms are put together in the semi-active and hybrid system to obtain all advantages of the algorithm along with overcoming their limitations. The review also briefs about stochastic vibrational control of the structure where randomness is considered in external loads, parameter of the system and also in the external devices which are implemented in the structural control. As construction sector is a complex system, big data analysis, a new field in structural control system is discussed and future scope is also mentioned.

scholarly journals Design and control of underwater hybrid vehicle capable of performing numerous tasks

2018 ◽  
Vol 15 (2) ◽  
pp. 127-134
Author(s):  
Kamran Shahani ◽  
C. Wu ◽  
R. Persaud ◽  
H. Song
Keyword(s):  
Control System ◽  
Remote Control ◽  
Hybrid Vehicle ◽  
Autonomous Control ◽  
Underwater Robot ◽  
Moving Target ◽  
Fixed Distance ◽  
Distinct Color ◽  
And Control

This paper is about Ocean Strider; an Underwater Hybrid Vehicle that is modified with hybrid (manual and autonomous) control system. The aims concerning this Underwater Hybrid Vehicle are to be competent to operate underwater by using remote control via operator and seek out the user interested objects, and in case of autonomously to be smart, to visually follow and manage a secured position comparable to a motionless target, and to visually follow and move behind a moving target and avoid the hindrances for reliable navigation. Vision is a fundamental root that promotes the underwater robot to execute various tasks autonomously. Ocean Strider is intelligent to explicitly identify and locate objects by specifying from distinct color codes and dimension of the objects and respond accordingly. Multiple experiments have been conducted in the laboratory the robot successfully operates manually and grasp the objects underwater, and the robot can locate and track the objects autonomously, secure a fixed distance to the fixed object and travel onward with the object as it moves.      

scholarly journals Design and Experimental Analysis on Autonomous Control System of Wave Glider

2018 ◽  
Vol 452 ◽  
pp. 042035
Author(s):  
Jian Shi ◽  
Zhanfeng Qi ◽  
Yufeng Qin ◽  
Xuewu Hong ◽  
Jian Zhao
Keyword(s):  
Control System ◽  
Experimental Analysis ◽  
Autonomous Control ◽  
Wave Glider
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