Development of a high-performance force sensing fast tool servo

2021 ◽  
pp. 1-1
Author(s):  
Rongjing Zhou ◽  
Zi-Hui Zhu ◽  
Lingbao Kong ◽  
Xu Yang ◽  
Limin Zhu ◽  
...  
Keyword(s):  
High Performance ◽  
Force Sensing ◽  
Fast Tool Servo

A High-Performance Normal-Stressed Electromagnetic Fast Tool Servo

2021 ◽  
pp. 364-373
Author(s):  
Zi-Hui Zhu ◽  
Dongran Shen ◽  
Peng Huang ◽  
LiMin Zhu ◽  
Zhiwei Zhu
Keyword(s):  
High Performance ◽  
Fast Tool Servo

Optomechatronic response of high-performance force-sensing microlasers

2001 ◽  
Author(s):  
Wolfgang Holzapfel ◽  
Michael Kobusch ◽  
Ulrich Neuschaefer-Rube
Keyword(s):  
High Performance ◽  
Force Sensing

scholarly journals Development of Gaiting Analysis using Footwear

2020 ◽  
Vol 9 (7) ◽  
pp. 1161-1167
Keyword(s):  
Fall Prevention ◽  
High Performance ◽  
Sensory System ◽  
Fall Detection ◽  
Force Sensing ◽  
Maximum Pressure ◽  
The Core ◽  
Boundary Limit ◽  
Military Applications ◽  
Physically Challenged

An intelligent hybrid project is developed for assisting the partially impaired and physically challenged people. The Fall Detection is proposed to ensure the safety of these people. Force Sensing Resistor (FSR) sensors are attached to the footwear. For each in a pair of shoes four FSR sensors are attached at the precise locations in the shoe. In this method, the user’s pressure from the specified points is calculated in real time using an integrated force sensory system, which comprises FSR sensors in the shoe. When the pressure from these specified points cross the boundary limit of the specified safety value, i.e., the maximum pressure, it is assessed that the user is going to fall down. The data retrieved from these FSR sensors is used for computing the gaiting analysis. We have used Arduino microcontrollers for data collection from the pair of shoes incorporated with sensors. The data gathered here is transmitted via Bluetooth protocol to the core FPGA where the main Gaiting Analysis is performed and fall detection is achieved here. The novelty in this paper is we have used the FPGA board for Fall Detection because it has high performance, less power consumption and parallel processing support. So using FPGA is the best option in this project. This project can be broadly applied across Healthcare and Military applications. The detected fall can be further improved and it can be prevented by Fall Prevention prototypes. In this study, we have successfully achieved the desired results, and all the proposed methods were finally verified through simulations and experiments.

scholarly journals Comprehensive Design Method of a High-Frequency-Response Fast Tool Servo System Based on a Full-Frequency Error Control Algorithm

Micromachines ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1354
Author(s):  
Zelong Li ◽  
Chaoliang Guan ◽  
Yifan Dai ◽  
Shuai Xue ◽  
Lianmin Yin
Keyword(s):  
Natural Frequency ◽  
High Performance ◽  
Control Algorithm ◽  
Phase Error ◽  
Tracking Error ◽  
Phase Delay ◽  
Optical Systems ◽  
Frequency Error ◽  
Fast Tool Servo ◽  
Optical Mirrors

With the development of optoelectronic information technology, high-performance optical systems require an increasingly higher surface accuracy of optical mirrors. The fast tool servo (FTS) based on the piezoelectric actuator is widely used in the compensation machining of high-precision optical mirrors. However, with the low natural frequency of mechanical structures, hysteresis of the piezoelectric actuators, and phase delay of the control systems, conventional FTS systems face problems such as a low working frequency and a large tracking error. This study presents a method for the design of a high-performance FTS system. First, a flexure hinge servo turret with a high natural frequency was designed through multi-objective optimization and finite element simulations. Subsequently, a composite control algorithm was proposed, targeting the problems of hysteresis and phase delay. The modified Prandtl–Ishlinskii inverse hysteresis model was used to overcome the hysteresis effect and a zero-phase error tracker was designed to reduce the phase error. The experimental results reveal that the tracking error of the designed FTS system was <10% in the full frequency range (0–1000 Hz).

A High Performance Energy Analyzer for Use in Electron Scanning Microscopy

1969 ◽  
Vol 27 ◽  
pp. 14-15
Author(s):  
A. V. Crewe ◽  
M. Isaacson ◽  
D. Johnson
Keyword(s):  
High Performance ◽  
Vertical Plane ◽  
Median Plane ◽  
Electron Gun ◽  
Uniform Field ◽  
Loss Mechanism ◽  
Electron Scanning Microscopy ◽  
Sector Type ◽  
Double Focusing ◽  
Electron Energy Loss

A double focusing magnetic spectrometer has been constructed for use with a field emission electron gun scanning microscope in order to study the electron energy loss mechanism in thin specimens. It is of the uniform field sector type with curved pole pieces. The shape of the pole pieces is determined by requiring that all particles be focused to a point at the image slit (point 1). The resultant shape gives perfect focusing in the median plane (Fig. 1) and first order focusing in the vertical plane (Fig. 2).

Vacuum System to Minimize the Specimen Contamination of High-Performance EM

1977 ◽  
Vol 35 ◽  
pp. 68-69
Author(s):  
N. Yoshimura ◽  
K. Shirota ◽  
T. Etoh
Keyword(s):  
Electron Microscope ◽  
High Speed ◽  
High Performance ◽  
High Vacuum ◽  
Vacuum System ◽  
Pump System ◽  
Pumping System ◽  
Diffusion Pump ◽  
Almost All ◽  
Cascade Type

One of the most important requirements for a high-performance EM, especially an analytical EM using a fine beam probe, is to prevent specimen contamination by providing a clean high vacuum in the vicinity of the specimen. However, in almost all commercial EMs, the pressure in the vicinity of the specimen under observation is usually more than ten times higher than the pressure measured at the punping line. The EM column inevitably requires the use of greased Viton O-rings for fine movement, and specimens and films need to be exchanged frequently and several attachments may also be exchanged. For these reasons, a high speed pumping system, as well as a clean vacuum system, is now required. A newly developed electron microscope, the JEM-100CX features clean high vacuum in the vicinity of the specimen, realized by the use of a CASCADE type diffusion pump system which has been essentially improved over its predeces- sorD employed on the JEM-100C.

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