Development of a dual-stage and visual-servo filming robot

2021 ◽  
pp. 095965182199136
Author(s):  
Liang-Chien Liu ◽  
Ping-Han Yang ◽  
Shih-Chi Liao ◽  
Bing-Peng Li ◽  
Fu-Cheng Wang ◽  
...  
Keyword(s):  
Fast Response ◽  
Tracking Performance ◽  
Visual Servo ◽  
Response Characteristics ◽  
Lower Stage ◽  
Upper Stage ◽  
Dual Stage ◽  
Switching Controller ◽  
Similar Evaluation ◽  
Better Than

This article presents the development of a visual-servo filming robot for dolly & truck style camera movement in filming applications. The robot was implemented with a fast-response slider as the upper stage on top of the slow-response tracked robot body as the lower stage, to improve target tracking performance. A new switching controller was developed, which controlled the stages’ motions by balancing and adjusting the weights of vision error and slider’s noncentering error of the upper stage, thus achieving tracking performance better than the traditional master–slave control strategy. The simulations were carried out to evaluate the tracking performance of the model, particularly focusing on evaluating how the dual stage improves the overall response of the model. The similar evaluation was executed experimentally as well. Both results confirm that the fast-response characteristics of the upper stage can compensate the slow dynamics of lower stage, the tracked robot which is inevitably heavy due to its composition.

scholarly journals Cellulose Nanopaper Cross-Linked Amino Graphene/Polyaniline Sensors to Detect CO2 Gas at Room Temperature

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5215 ◽  
Author(s):  
Hanan Abdali ◽  
Bentolhoda Heli ◽  
Abdellah Ajji
Keyword(s):  
Bacterial Cellulose ◽  
Room Temperature ◽  
Morphological Structure ◽  
High Sensitivity ◽  
Fast Response ◽  
Aniline Monomer ◽  
Resistance Response ◽  
Covalent Interaction ◽  
Response Characteristics ◽  
Carbon Dioxide Co2

A nanocomposite of cross-linked bacterial cellulose–amino graphene/polyaniline (CLBC-AmG/PANI) was synthesized by covalent interaction of amino-functionalized graphene (AmG) AmG and bacterial cellulose (BC) via one step esterification, and then the aniline monomer was grown on the surface of CLBC-AmG through in situ chemical polymerization. The morphological structure and properties of the samples were characterized by using scanning electron microscopy (SEM), and thermal gravimetric analyzer (TGA). The CLBC-AmG/PANI showed good electrical-resistance response toward carbon dioxide (CO2) at room temperature, compared to the BC/PANI nanopaper composites. The CLBC-AmG/PANI sensor possesses high sensitivity and fast response characteristics over CO2 concentrations ranging from 50 to 2000 ppm. This process presents an extremely suitable candidate for developing novel nanomaterials sensors owing to easy fabrication and efficient sensing performance.

Research on a Novel Two-Phase Hybrid Stepping Motor

2011 ◽  
Vol 121-126 ◽  
pp. 4122-4126
Author(s):  
Yong Kui Man ◽  
Yu Yan Ma ◽  
Yu Shuang Zhao ◽  
Chang Cheng Xu ◽  
Wen Sheng Hao
Keyword(s):  
Fast Response ◽  
Control Mode ◽  
Stepping Motor ◽  
Two Phase ◽  
Motor Torque ◽  
Response Characteristics ◽  
Torque Vector ◽  
Hybrid Stepping Motor ◽  
Motor Operation ◽  
And Control

In this paper, the mechanical structure of a novel two-phase hybrid stepping motor, which offers big transmission ratio and fast response characteristics, is proposed. Comparing with typical two-phase hybrid stepping motor, permanent magnet of the new model is placed on the stator, thus it has better utilization of space than conventional two-phase hybrid stepping motor. Furthermore, new two-phase hybrid stepping motor torque mathematical model is established. And the two-phase hybrid stepping motor torque vector analysis method we provide here provide you with an intuitive way of research on the new type two-phase hybrid stepping motor operation principle and control mode.

A Novel Ceramic Thermocouple Used in High-Temperature Measurement

2011 ◽  
Vol 197-198 ◽  
pp. 328-332
Author(s):  
Li Chao Feng ◽  
Ning Xie ◽  
Wen Zhu Shao ◽  
Yu Sheng Cui ◽  
Liang Zhen
Keyword(s):  
High Temperature ◽  
Powder Metallurgy ◽  
Temperature Measurement ◽  
Powder Metallurgy Method ◽  
Simple Relationship ◽  
Response Characteristics ◽  
Sic Ceramics ◽  
High Temperature Measurement ◽  
Holding Temperature ◽  
Better Than

MoSi2and SiC ceramics were prepared by traditional powder metallurgy method. A novel ceramic thermocouple (CTC) used in the high temperature and high corrosion environment was assembled by SiC as the cathode and MoSi2as the anode. The thermo-emf of CTC was tested from 25 °C to 1600 °C in air. The results show that there is a simple relationship between the thermo-emf of CTC and the temperature. By holding temperature for 70 h at 1500 °C, the deviation of thermo-emf is ±0.37%, and better than 0.75% which is the criteria of industry thermocouple. And also the response characteristics of CTC were analyzed.

A study of fast response characteristics for hydrogen sensing with platinum FET sensor

2006 ◽  
Vol 114 (1) ◽  
pp. 158-163 ◽  
Author(s):  
K. Tsukada ◽  
T. Kiwa ◽  
T. Yamaguchi ◽  
S. Migitaka ◽  
Y. Goto ◽  
...  
Keyword(s):  
Fast Response ◽  
Response Characteristics ◽  
Hydrogen Sensing

Importance of Nanosensors: Feynman's Vision and the Birth of Nanotechnology

MRS Bulletin ◽  
2007 ◽  
Vol 32 (9) ◽  
pp. 718-725 ◽  
Author(s):  
Jozef T. Devreese
Keyword(s):  
Molecular Level ◽  
State Of The Art ◽  
Fast Response ◽  
Atomic Scale ◽  
Advanced Materials ◽  
New Class ◽  
Intelligent Sensors ◽  
Integrated Devices ◽  
Further Development ◽  
Better Than

In his visionary 1959 lecture at Caltech, Richard P. Feynman foresaw the potential of the ability to manipulate matter at the atomic scale. In this article, adapted from Integrated Nanosensors, MRS Symposium Proceedings Volume 952E, edited by I.K. Schuller, Y. Bruynseraede, L.M. Lechuga, and E. Johnson (2007), Jozef T. Devreese (University of Antwerp) discusses implementations of Feynman's vision in the field of nanosensors and perspectives of its further development and applications.Nanoparticles are unique tools as sensors. Particles with sizes at the nanoscale reveal physical properties that do not exist in bulk materials; these properties can operate well inside living cells. Nanosensors possess unique physical characteristics. Their sensitivity can be orders of magnitude better than that of conventional devices. Nanosensors possess such performance advantages as fast response and portability. State-of-the-art nanosensors are based on various advanced materials (quantum dots, nanoshells, nanopores, carbon nanotubes, etc.). Nanosensors furthermore allow for building an entirely new class of integrated devices that provide the elemental base for “intelligent sensors” capable of data processing, storage, and analysis. Advances can open unprecedented perspectives for the application of nanosensors in various fields, for example, as molecular-level diagnostic and treatment instruments in medicine and as networks of nanorobots for real-time monitoring of physiological parameters of a human body.

scholarly journals Comparative Study of DE, PSO and GA for Position Domain PID Controller Tuning

2021 ◽  
Author(s):  
Puren Ouyang ◽  
Vangjel Pano
Keyword(s):  
Performance Improvement ◽  
Pid Controller ◽  
Robotic Manipulators ◽  
Tracking Performance ◽  
Contour Tracking ◽  
Fitness Functions ◽  
Performance Indexes ◽  
Pid Controller Tuning ◽  
Optimal Gains ◽  
Better Than

Gain tuning is very important in order to obtain good performances for a given controller. Contour tracking performance is mainly determined by the selected control gains of a position domain PID controller. In this paper, three popular evolutionary algorithms are utilized to optimize the gains of a position domain PID controller for performance improvement of contour tracking of robotic manipulators. Differential Evolution (DE), Genetic Algorithm (GA), and Particle Swarm Optimization (PSO) are used to determine the optimal gains of the position domain PID controller, and three distinct fitness functions are also used to quantify the contour tracking performance of each solution set. Simulation results show that DE features the highest performance indexes for both linear and nonlinear contour tracking, while PSO is quite efficient for linear contour tracking. Both algorithms performed consistently better than GA that featured premature convergence in all cases.

Fast Response Characteristics of Flexible Ultraviolet Photosensors with GaN Nanowires and Graphene

2019 ◽  
Vol 12 (1) ◽  
pp. 970-979 ◽  
Author(s):  
Sangmoon Han ◽  
Ilgyu Choi ◽  
Cheul-Ro Lee ◽  
Kwang-Un Jeong ◽  
Seoung-Ki Lee ◽  
...  
Keyword(s):  
Fast Response ◽  
Response Characteristics ◽  
Gan Nanowires

Speed- and Range-based Filter Design for Dual-Stage Actuator Control

2021 ◽  
pp. 1-9
Author(s):  
James Peyton-Jones ◽  
Aleksandra Mitrovic ◽  
G. M. Clayton
Keyword(s):  
Filter Design ◽  
Low Frequency ◽  
Response Characteristics ◽  
Speed Range ◽  
Dual Stage ◽  
The Individual ◽  
Actuator Control ◽  
Different Characteristics ◽  
Dual Stage Actuator ◽  
First Time

Abstract Dual-stage actuators, which combine two actuators with different characteristics, have gained interest due to their large-range, high-resolution positioning capabilities. Control of such systems is challenging because it requires balancing the relative contributions of the individual actuators in terms of speed, range and precision. The most common approach is to allocate effort to the actuators based on frequency but this can lead to misallocation in the case of low-frequency short-range trajectories. In this paper, the problem of trajectory allocation in dual-stage actuator systems is addressed using a recently developed range-based filter. The theoretical basis of the range-based filter is rigorously derived for the first time and insights regarding its use, specifically its reinterpretation as a speed-based filter, and its range-frequency response characteristics are presented. The new analysis not only explains the behavior of the filter clearly, but it provides a more robust strategy for incorporating range constraints in filter design for different desired trajectories.

Performa Kinerja Web Server Berbasis Ubuntu Linux Dan Turnkey Linux

2018 ◽  
Vol 5 (2) ◽  
pp. 68-78 ◽  
Author(s):  
Intan Yuli Andhica ◽  
Dadan Irwan
Keyword(s):  
Operating System ◽  
Response Time ◽  
Web Server ◽  
Fast Response ◽  
Web Performance ◽  
Time Value ◽  
Request Rate ◽  
Access Service ◽  
Better Than

ABSTRACT   One of the most frequently used server service functions is to provide a website access service, called a web server. In this study, we use two servers with Ubuntu operating system and Turnkey Linux with its objective to compare web performance to get parameters of response time value and throughput value. The test is carried out with a request rate of 10 to 100 with 1000 and 2000 connections. Based on the results obtained, Web server which uses Ubuntu Linux is better than Turnkey Linux, it is indicated by the value of small response time which means fast response and large throughput value, and this means good. A Web server that has 1000 connections generates a response time and a good throughput value, while the 2000 number of connections generates a response time value and a reduced throughput value, it is because for more than 1000 connections can affect the speed of the system.   Keywords : performance, web server, response time, thoughput     ABSTRAK   Salah satu fungsi layanan server yang sering digunakan adalah menyediakan layanan akses situs web, yang disebut sebagai web server. Dalam penelitian ini menggunakan dua server dengan sistem operasi Ubuntu dan Turnkey Linux dengan tujuan  membandingkan performa kinerja web  untuk mendapatkan parameter nilai responsese time dan nilai throughput. Pengujian dilakukan dengan request rate sebanyak 10 sampai 100 dengan jumlah 1000 koneksi dan 2000 koneksi. Berdasarkan hasil pengujian diperoleh bahwa Web server yang menggunakan Ubuntu Linux lebih baik dari Turnkey Linux yang ditunjukkan oleh nilai response time  kecil yang berarti response cepat dan nilai throughput besar yang berarti baik. Web server yang  memiliki jumlah 1000 koneksi menghasilkan nilai response time dan nilai throughput yang cukup baik, sedangkan jumlah 2000 koneksi menghasilkan nilai response time dan nilai throughput yang menurun karena jumlah koneksi yang lebih dari 1000 dapat mempengaruhi kecepatan sistem .        Kata kunci : performa, web server, response time, throughput

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