scholarly journals Multiband SHEPWM Control Technology Based on Walsh Functions

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1000
Author(s):  
Song Li ◽  
Guizhi Song ◽  
Manyuan Ye ◽  
Wei Ren ◽  
Qiwen Wei
Keyword(s):  
Digital Signal Processor ◽  
Piecewise Linear ◽  
Linear Equations ◽  
Digital Signal ◽  
Walsh Function ◽  
Multilevel Inverter ◽  
Modulation Index ◽  
Walsh Functions ◽  
Control Technology ◽  
Real Time Control

The drawback of modulation ratio limitation in selective harmonic elimination pulse width modulation (SHEPWM) technology based on Walsh function transformation. In order to solve this problem, a multiband SHEPWM control technology method for a multilevel inverter based on Walsh functions is proposed. By analyzing multiband SHEPWM for multilevel inverter voltage waveforms under a Fourier series transform, the unified nonlinear multiband SHEPWM equations for a multilevel inverter with a modulation index varying from 0 to 1 can be generalized. The equations can be solved by Walsh function transform. In this way, the difficulties faced in expanding the modulation index, online calculation, and real-time control are resolved simultaneously. A seven-level inverter is taken as the example, for which the piecewise linear equations of Walsh functions under different bands and the trajectories of switching angles are given. Meanwhile, the conditions for multiple sets of solutions at such a point where the modulation index is switched over are also taken into account. The feasibility of the proposed method is verified by simulation based on MATLAB and SIMULINK. Finally, the feasibility of the practical application is proved by the experiment based on Digital Signal Processor (DSP).

DIGITAL SIGNAL PROCESSOR-BASED INVESTIGATION OF CHUA'S CIRCUIT FAMILY

1993 ◽  
Vol 03 (02) ◽  
pp. 269-292 ◽  
Author(s):  
MICHAEL PETER KENNEDY ◽  
CHAI WAH WU ◽  
STANLEY PAU ◽  
JAMES TOW
Keyword(s):  
Digital Signal Processor ◽  
Piecewise Linear ◽  
Digital Signal ◽  
Chua’S Circuit ◽  
Single Chip ◽  
Integration Algorithm ◽  
Chua's Circuit ◽  
Multistep Integration ◽  
Circuit Family ◽  
Signal Processor

This paper is concerned with exploiting the architecture of a single-chip digital signal processor for integrating piecewise-linear ODEs. We show that DSPs can be usefully applied in the study of Chua's circuit family provided that one chooses a multistep integration algorithm which exploits their unique single-instruction multiply-and-accumulate feature.

Study of Five-Level Inverter SHEPWM Control Technology Based on Walsh Function

2014 ◽  
Vol 986-987 ◽  
pp. 1273-1276
Author(s):  
Song Li
Keyword(s):  
High Speed ◽  
Linear Equations ◽  
Walsh Function ◽  
High Accuracy ◽  
Modulation Index ◽  
Voltage Waveform ◽  
Simulation Research ◽  
On Line ◽  
Multi Level ◽  
Multi Band

SHEPWM technique applicable to multi-level voltage inverter via Walsh function can be solved by linear equations instead of nonlinear transcendental equations. This method don't need a large number of initial values, it’s suitable for online calculation because of its advantages such as high speed calculation and high-accuracy. For the traditional SHEPWM technique based on Walsh function has modulation index restricted problem. This paper proposes a multilevel SHEPWM technique, which Combined Walsh function with multi-band modulation technique. Through the analysis of multi-level multi-band SHEPWM voltage waveform based on Fourier series transform, summarized the multi-level multi-band SHEPWM nonlinear equations when modulation index changed from 0 to 1, and solved the problem with on-line control calculating and modulation index expanding by Walsh function transform. Take five-level inverter as an example, according to the values obtained and considering some equations have several solutions under certain modulation index, using the MATLAB/SIMULINK software do simulation research. The result confirmed that the multi-level multi-band SHEPWM technique based on Walsh function transform is correct and practical.

scholarly journals Real-Time Control of Beam Trajectories Using Digital Signal Processor for the Heavy Ion Beam Probe on the Large Helical Device

2010 ◽  
Vol 5 ◽  
pp. 043-043
Author(s):  
Shigetoshi NAKAMURA ◽  
Akihiro SHIMIZU ◽  
Takeshi IDO ◽  
Kazuo TOI ◽  
Masaki NISHIURA ◽  
...  
Keyword(s):  
Real Time ◽  
Digital Signal Processor ◽  
Ion Beam ◽  
Digital Signal ◽  
Heavy Ion ◽  
Real Time Control ◽  
Time Control ◽  
Heavy Ion Beam ◽  
Heavy Ion Beam Probe ◽  
Signal Processor

Real-Time Solution of Inverse Kinematics for 6R Robot Manipulators Using Digital Signal Processor

2013 ◽  
Vol 423-426 ◽  
pp. 2788-2791
Author(s):  
Lin Chen ◽  
Hai Hong Pan ◽  
Han Ling Mao
Keyword(s):  
Real Time ◽  
Digital Signal Processor ◽  
Inverse Kinematics ◽  
Robot Manipulators ◽  
Digital Signal ◽  
Central Processor ◽  
Real Time Control ◽  
End Effector ◽  
The Real ◽  
Signal Processor

It is a challenge to get real-time solutions for the inverse kinematics problem of 6R robot. In this study, a digital signal processor (DSP) was adopted as the central processor for the algorithm inverse kinematics. Based on it, the robot end-effector carried out the interpolation of point-to-point spatial straight line, and the inverse kinematics solving of 6R robot manipulators end-effector was achieved. The deflection variations of the 6 joints were acquired during the interpolation in a Cartesian coordinate. The results show that inverse Kinematics solution for each interpolation point only cost 0.06588 millisecond using DSP 6711. This hard structure can ensure the real-time performance of control for robot and content the real-time control performance expected of industrial manipulators.

Design of Embedded Numerical Control Platform for Carton Samplemaker

2010 ◽  
Vol 139-141 ◽  
pp. 2234-2238
Author(s):  
Jian Qun Liu ◽  
Ji Rong Wu ◽  
Dong Xu
Keyword(s):  
Real Time ◽  
Software Design ◽  
Digital Signal Processor ◽  
Digital Signal ◽  
Numerical Control ◽  
Actual Situation ◽  
Real Time Control ◽  
Time Control ◽  
Dual Core ◽  
Speed And Accuracy

As most controllers of the carton samplemaker using Industrial Personal Computer (IPC) architecture, its price is relatively expensive. Aiming at the actual situation of the high cost, low openness and big demand of the carton samplemaker, through the analysis of the control characteristics of it, the embedded Numerical Control (NC) platform based on the Advanced RISC Machines (ARM) and Digital Signal Processor (DSP) hardware architecture for carton samplemaker is designed. The overall framework of the platform and steps of the design are given in this paper. Windows CE embedded real-time operating system is adopted in the software design, and on this basis, the carton samplemaker applications is developed, which is mainly in charge of the motion control of the equipment and tasks management. The platform not only achieves the goals on real-time control, good speed and accuracy, but also has friendly operability. Finally, the introduction of the new dual-core chips gives a revelation on the future development in carton samplemaker.

scholarly journals DEVELOPMENT OF A M3S PROTOTYPE SYSTEM USING DIGITAL SIGNAL PROCESSOR

2003 ◽  
Vol 15 (06) ◽  
pp. 212-216
Author(s):  
JEN-CHIEN CHIEN ◽  
MENG-LUN HSUEH ◽  
CHIEN-CHI CHEN ◽  
JER-JUNN LUH ◽  
JIN-SHIN LAI ◽  
...  
Keyword(s):  
Digital Signal Processor ◽  
Digital Signal ◽  
Working Environment ◽  
Prototype System ◽  
Real Time Control ◽  
Integral Control ◽  
Serial Interface ◽  
Time Control ◽  
Control Computer ◽  
Environment Control

Acute disabilities always need different types of assistive devices in their daily life. Usually, each of these devices is designed for only one particular usage. Because of this, an acute disable may have to use a joystick to manipulate his wheelchair, used a mouse to control computer, or used a keyboard to control movement of mechanical arm. Thus no consideration of interrelations among these tools was discussed. In 1990, the technical working committee 173 (TC-173/sc-1/wg-7) of ISO (International Organization for Standardization) using serial interface protocol (ISO 7176-7) to integrate all types of assistive tools for the disabilities. At the same time, the European Common Commission funded the research for M3S interface (Multiple Masters Multiple Slave). It provides the disable a concrete integral control for his movement, working, environment control and communication. This is an integrated intelligent real time control capability protocol. It is a plug and play device interface. We design and develop a M3S protocol using TMS320F243 DSP chip. The system was tested for I/O control and it meets the equipments supported by the M3S working group. Thus, it would bring lots of comforts for the disable.

Robot Objective Parallel Calculation and Real-time Control Using a Digital Signal Processor

1998 ◽  
Vol 10 (6) ◽  
pp. 505-514
Author(s):  
Yoshiyuki Sankai ◽  
◽  
Tetsuya Nii ◽  
Shinichi Kariya
Keyword(s):  
Real Time ◽  
Parallel Computation ◽  
Digital Signal Processor ◽  
High Speed ◽  
Control Method ◽  
Digital Signal ◽  
Real Time Control ◽  
Parallel Calculation ◽  
Time Control ◽  
Signal Processor

We propose an objective parallel computation/control method, developing the following to solve conventional problems and installing a controller on a robot with links decomposed to objects: 1) parallel calculation for twodimensional link dynamics, 2) downsizing of a high-speed controller using a digital signal processor (DSP), 3) a common robot control library, and 4) parallel calculation control of a multilink system. Evaluating parallel computation/control using the DSP, we verified fine compact controller efficiency in real-time control of multi-DOF systems and control performance comparing overall system control by linear quadratic optimal control.

Digital Implementation and Simulation of the ZVS Control Scheme

2013 ◽  
Vol 336-338 ◽  
pp. 19-22
Author(s):  
Bai Fen Liu ◽  
Ying Gao
Keyword(s):  
Control Strategy ◽  
Digital Signal Processor ◽  
Digital Control ◽  
Large Scale ◽  
Digital Signal ◽  
Small Range ◽  
Control Technology ◽  
Digital Implementation ◽  
Digital Pid ◽  
Object Parameter

Digital control algorithm common neural networks, fuzzy control, digital PID digital PID technology used widely and mature, the digital PID proportional, integral, derivative control the abbreviation. These advantages: simple in principle, applicability; little within the small range of the controlled object parameter changes on the performance indicators, a great guarantee the validity of the regulation. PID is the most successful control strategy in the analog control technology, digitized; people naturally will this control strategy is grafted onto the digital control technology. The system is digital PID.Used to implement a digital control chip has many, e.g., microcontroller, field programmable gate arrays (FPGAs), digital signal processor (DSP) and the microcontroller (ARM). SCM is the first large-scale application of the controller, but due to the speed of operation and the median can not meet the growing industrial control requirements. .

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