High-Speed and High-Accuracy Schemes of Coordinate Calculation and End Point Judgment for Elliptic Interpolation

2012 ◽  
Vol 217-219 ◽  
pp. 2664-2668
Author(s):  
Shi Yong Wang ◽  
Di Li
Keyword(s):  
Motion Control ◽  
High Speed ◽  
High Performance ◽  
High Accuracy ◽  
Interpolation Point ◽  
End Point ◽  
Sample Method ◽  
Relationship Of ◽  
Approximation Calculation

To implement high-speed and high-accuracy elliptic interpolation required in high-performance motion control, novel coordinate calculation and end point judgment schemes are proposed. Data Sample method is used for coordinate calculation. High accuracy is guaranteed by avoiding approximation calculation of interpolation points. Exact end point judgment is constructed based on the position relationship of the current interpolation point, the next interpolation point and the end point to avoid incomplete interpolation or over interpolation of elliptic trajectories. The proposed schemes feature fewer amounts of calculation and high accuracy and can produce any elliptic trajectories.

A NURBS Interpolator Using Multiprocessor on Chip for High Performance Motion Control

2011 ◽  
Vol 130-134 ◽  
pp. 1929-1932
Author(s):  
Wei Tang ◽  
Xiao Dong Zhang ◽  
Yong Ding ◽  
Jing Jing
Keyword(s):  
Motion Control ◽  
High Speed ◽  
High Performance ◽  
Experimental Tests ◽  
High Accuracy ◽  
Motion Controller ◽  
Real Time Control ◽  
Time Control ◽  
Nurbs Interpolation ◽  
On Chip

Modern CNC system adopts the NURBS interpolation for the purpose of achieving high-speed and high accuracy performance. However, in conventional control architectures, the computation of the basis functions of a NURBS curve is very time consuming due to serial computing constraints. In this paper, a novel multiprocessor-based motion controller on chip utilizing its high-speed parallel computing power is proposed to realize the NURBS interpolation. The motion control algorithm and I/O control are also embedded in the chip to implement real-time control and NURBS interpolation simultaneously. The experimental tests using an X-Y table verify the outstanding computation performance of the multiprocessor-based motion controller on chip. The result indicates that shorter sampling time (0.1 ms) can be achieved for NURBS interpolation and high-accuracy motion control.

Motion Control of Ultra-High-Speed Manipulator with a Flexible Link Based on Dynamically Coupled Driving

2006 ◽  
Vol 18 (5) ◽  
pp. 598-607 ◽  
Author(s):  
Tomoari Maruyama ◽  
◽  
Chunquan Xu ◽  
Aiguo Ming ◽  
Makoto Shimojo
Keyword(s):  
Motion Control ◽  
High Speed ◽  
Wrist Joint ◽  
High Accuracy ◽  
Human Motion ◽  
Golf Club ◽  
Direct Drive ◽  
Flexible Link ◽  
Ultra High Speed ◽  
Drive Motor

We have developed a golf robot whose swing simulates human motion. The design concept is to realize ultra-high-speed dynamic manipulation using a dexterous mechanism. The robot consists of a shoulder joint with a high-power direct-drive motor and a wrist joint with a low-power direct-drive motor. High-speed golf swings are realized by a sort of motion control, called dynamically-coupled driving which compensates for the lack of drive in the wrist joint. In this paper a new model accounting for golf club flexibility with all parameters identified in experiments was developed. Based on this, we generated and implemented trajectories for different criteria. Experimental results confirmed the high accuracy of motion control and the feasibility of golf club flexibility in ultra-high-speed manipulation.

The Research Progress of Melanin

2011 ◽  
Vol 204-210 ◽  
pp. 2057-2060
Author(s):  
Jian Ming Wang ◽  
Ai Hua Ao ◽  
Chang Sheng Qiao ◽  
Yu Zhong ◽  
Yuan Yuan Zhang
Keyword(s):  
High Speed ◽  
High Performance ◽  
Analytical Techniques ◽  
Research Progress ◽  
Countercurrent Chromatography ◽  
New Techniques ◽  
Wide Range ◽  
High Performance Capillary Electrophoresis ◽  
Relationship Of ◽  
The Relationship

The sources of melanin and the sorts of melanin are introduced. New techniques for extraction and analysis of natural melanin were introduced. New analytical techniques are high performance liquid chromatography, high-speed countercurrent chromatography, high performance capillary electrophoresis and chromatography-mass spectrometry. The relationship of polyketide melanogenesis molecular biology to that of nonmelanin-producing pathways in a wide range of fungi and other organisms is discussed. The applications of melanin are introduced.

An Approach to Motion Control Applications Based on Advanced Programmable Devices

2012 ◽  
Vol 49 (3) ◽  
pp. 243-259 ◽  
Author(s):  
Juvenal Rodríguez-Reséndiz ◽  
Fortino Mendoza-Mondragón ◽  
Roberto A. Gómez-Loenzo ◽  
M. Agustín Martínez-Hernández ◽  
Victor H. Mucino
Keyword(s):  
Motion Control ◽  
Digital Signal Processor ◽  
High Speed ◽  
High Performance ◽  
Engineering Students ◽  
Low Cost ◽  
Digital Signal ◽  
Hybrid Architecture ◽  
Servo Drive ◽  
Control Applications

In this article a methodology for constructing a simple servo loop for motion control applications which is suitable for educational applications is presented. The entire hardware implementation is demonstrated, focusing on a microcontroller-based (μC) servo amplifier and a field programmable gate array-digital signal processor (FPGA-DSP) motion controller. A novel hybrid architecture-based digital stage is featured providing a low-cost servo drive and a high performance controller, which can be used as a basis for an industrial application. Communication between the computer and the controller is exploited in this project in order to perform a simultaneous adaptive servo tuning. The USB protocol has been put into operation in the user front-end because a high speed sampling frequency is required for the PC to acquire position feedback signals. A software interface is developed using educational software, enabling features not only limited to a motion profile but also the supervisory control and data acquisition (SCADA) topology of the system. A classical proportional-integral-derivative controller (PID) is programmed on a DSP in order to ensure a proper tracking of the reference at both low and high speeds in a d.c. motor. Furthermore, certain blocks are embedded on an FPGA. As a result, three of the most important technologies in signal processing are featured, permitting engineering students to understand several concepts covered in theoretical courses.

AlGaAs/GaAs HBTs FOR ANALOG AND DIGITAL APPLICATIONS

1994 ◽  
Vol 05 (03) ◽  
pp. 213-252 ◽  
Author(s):  
KEH-CHUNG WANG ◽  
RANDALL B. NUBLING ◽  
KEN PEDROTTI ◽  
NENG-HAUNG SHENG ◽  
PETER M. ASBECK ◽  
...  
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Accuracy ◽  
Bipolar Transistor ◽  
Heterojunction Bipolar Transistor ◽  
Electronic Systems ◽  
Ic Technology

AlGaAs/GaAs Heterojunction Bipolar Transistor (HBT) technology has emerged as an important IC technology for high performance electronic systems. Many outstanding circuits have been demonstrated as a result of the AlGaAs/GaAs HBTs high speed, high accuracy and its semi-insulating substrate. Several GaAs HBT manufacturing lines have been established; some of which are shipping products. In this paper, we describe AlGaAs/GaAs HBT technology, summarize some key and representative circuits in analog, A/D conversion and digital applications, and provide prospects of GaAs HBT research.

Many High Performance Motion Control of Linear Motor Drive System Research

2014 ◽  
Vol 599-601 ◽  
pp. 981-984
Author(s):  
Chuan Jun Li ◽  
Qiu Juan Liang
Keyword(s):  
Motion Control ◽  
High Precision ◽  
High Speed ◽  
High Performance ◽  
Control Method ◽  
Linear Motor ◽  
Structure Design ◽  
Numerical Control ◽  
System Control ◽  
Motion Platform

To realize the movement of high-speed, high-precision positioning, satisfy the requirement of the numerical control processing equipment and high precision, based on high performance motion control platform driven by linear motor, an optimized for high performance XY table structure design, the broadband modal coupling modeling and simulation movement, dynamics analysis and controller design, such as content, high performance motion platform organization structure optimization, the global optimization of mechanical system and electrical system. Eventually for high performance sports mechanism design, modeling method and system control method provides the key techniques such as solution, and to develop more high performance motion control of linear motor driven platform prototype machines.

scholarly journals Measurement of Rigidity Change of Preload Switching Spindle

2012 ◽  
Vol 6 (2) ◽  
pp. 175-179 ◽  
Author(s):  
Taku Yamazaki ◽  
◽  
Atsushi Matsubara ◽  
Shinya Ikenaga ◽  
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Rigidity ◽  
High Speeds ◽  
Loading Device ◽  
Magnetic Loading ◽  
Simulation Results ◽  
Load Displacement ◽  
Low Speeds ◽  
Relationship Of

High performance milling spindles with high rigidity and high speed are required for high productive machining. A preload switching spindle has been designed to obtain high rigidity at low speeds while avoiding bearing burn at high speeds. In this report, the load-displacement relationship of a preload switching spindle is measured with a non-contact magnetic loading device. Measurement and simulation results are compared to clarify the rigidity change by preload switching.

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