Control system of a dispersed fringe type sensing system of active optics

2010 ◽  
Author(s):  
Yajun Zhang ◽  
Zhenchao Zhang ◽  
Yong Zhang
Keyword(s):  
Control System ◽  
Active Optics ◽  
Sensing System

scholarly journals A Finite Element Approach to the Design of the Support System for the ESO 1 M. Active Optics Experiment

1984 ◽  
Vol 79 ◽  
pp. 75-93 ◽  
Author(s):  
G. Ballio ◽  
R. Contro ◽  
C. Poggi ◽  
O. Citterio
Keyword(s):  
Finite Element ◽  
Control System ◽  
Support System ◽  
Closed Loop ◽  
New Technology ◽  
Active Optics ◽  
Finite Element Approach ◽  
Primary Mirror ◽  
Element Approach ◽  
Correction Terms

A way to follow in order to reduce the weight of the primary mirror is to accept an higher ratio diameter-thickness and to find a remedy to the consequent greater deformability of the mirror by an active control system of it. A technique using closed loop active optics control has been proposed in references.In these papers, a coherent scheme of active optics control for the ESO New Technology Telescope (NTT) was presented, based on analysis of the image errors in terms of an appropriate polynomial (the ESO off-line telescope test polynomial) and the production of equivalent correction terms by force modulation of the primary axial support.

Control system of position actuators for segmented mirror active optics in LAMOST

2007 ◽  
Author(s):  
Xixia Du ◽  
Zhenchao Zhang ◽  
Yongjun Qi ◽  
Aihua Li
Keyword(s):  
Control System ◽  
Active Optics ◽  
Segmented Mirror

Design aspects and development of humanoid robot THBIP-2

Robotica ◽  
2008 ◽  
Vol 26 (1) ◽  
pp. 109-116 ◽  
Author(s):  
Zeyang Xia ◽  
Li Liu ◽  
Jing Xiong ◽  
Qiang Yi ◽  
Ken Chen
Keyword(s):  
Control System ◽  
Conceptual Design ◽  
Degrees Of Freedom ◽  
Humanoid Robot ◽  
Tsinghua University ◽  
Sensing System ◽  
Actuation System ◽  
System Realization ◽  
Zero Moment ◽  
And Control

SUMMARYThis is the first publication presenting the minihumanoid robot THBIP-2, the second-generation biped of Tsinghua University. It is 70 cm in height and 18 kg in weight with 24 degrees of freedom. This paper mainly addresses its mechatronics system realization, including the conceptual design, actuation system, sensing system, and control system. In addition, a walking stability controller based on zero moment point criterion and the walking simulation are presented. Finally, experiments validate and confirm the efficiency of the design.

Embedding and Multiplexing Large Scale Sensor Arrays for Digital Clay

2005 ◽  
Author(s):  
Haihong Zhu ◽  
Wayne J. Book
Keyword(s):  
Control System ◽  
Large Scale ◽  
Sensor Arrays ◽  
Large Array ◽  
Communication Interface ◽  
Sensing System ◽  
Large Numbers ◽  
Mems Technology ◽  
Ultimate Objective ◽  
Machine Communication

Digital Clay is proposed as the next generation human-machine communication interface with a morphing, tangible and haptic shape / surface. It is composed of a large array of hydraulic actuators in a planar pin-rod style and corresponding control system. It will be constructed using MEMS technology ultimately to satisfy the resolution, manufacturing and cost requirements. Per the ultimate objective, Digital Clay may have 10,000 to 1,000,000 actuators and, consequently, an array of sensors of similarly large numbers. In this paper the sensing system of the Digital Clay is investigated and solutions are given for current and future implementation.

A controller for safe, convenient operation of LaB6 emitters on electron-beam instruments

1983 ◽  
Vol 41 ◽  
pp. 408-409
Author(s):  
W. J. Abramson ◽  
H. W. Estry ◽  
L. F. Allard
Keyword(s):  
Electron Beam ◽  
Control System ◽  
Thermal Shock ◽  
Appropriate Care ◽  
Electron Guns ◽  
Tungsten Filaments ◽  
Order Of Magnitude ◽  
Main Components

LaB6 emitters are becoming increasingly popular as direct replacements for tungsten filaments in the electron guns of modern electron-beam instruments. These emitters offer order of magnitude increases in beam brightness, and, with appropriate care in operation, a corresponding increase in source lifetime. They are, however, an order of magnitude more expensive, and may be easily damaged (by improper vacuum conditions and thermal shock) during saturation/desaturation operations. These operations typically require several minutes of an operator's attention, which becomes tedious and subject to error, particularly since the emitter must be cooled during sample exchanges to minimize damage from random vacuum excursions. We have designed a control system for LaBg emitters which relieves the operator of the necessity for manually controlling the emitter power, minimizes the danger of accidental improper operation, and makes the use of these emitters routine on multi-user instruments.Figure 1 is a block schematic of the main components of the control system, and Figure 2 shows the control box.

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