Real-Time Implementation AMR-WB Algorithm in TMS320VC5509A DSP

2012 ◽  
Vol 490-495 ◽  
pp. 519-523
Author(s):  
Feng Lian Li ◽  
Xue Ying Zhang ◽  
Xiao Lin Du
Keyword(s):  
Real Time ◽  
Practical Significance ◽  
Objective Test ◽  
Test Results ◽  
System Software ◽  
Hardware Platform ◽  
The Real ◽  
Hardware System ◽  
Software Structure ◽  
Speech Codec

Adaptive multi-rate wideband (AMR-WB) speech codec is the first standard for both wired and wireless universal broadband speech codec. Real-time implementation of AMR-WB algorithm in DSP has important practical significance and will accelerate its course of practice. The paper first designed the hardware platform and system software structure for real-time implementation of the AMR-WB algorithm, then introduced the transplantation of AMR-WB algorithm to the designed hardware system. The paper next discussed the real-time implementation of optimized algorithm on the hardware platform. Objective test results indicated the decoded speeches of real-time platform were bit exactly the same as test sequences. Synthetic speeches of real-time platform were very good in restoring the speaker’s voice characteristics by good intelligibility and naturalness.

scholarly journals Real-Time Human in the Loop MBS Simulation in the Fraunhofer Robot-Based Driving Simulator

2014 ◽  
Vol 61 (2) ◽  
pp. 270-285 ◽  
Author(s):  
Michael Kleer ◽  
Andrey Gizatullin ◽  
Klaus Dreßler ◽  
Steffen Müller
Keyword(s):  
Real Time ◽  
Driving Simulator ◽  
Practical Significance ◽  
Time Model ◽  
Test Drive ◽  
The Real ◽  
Transport Delay ◽  
Human In The Loop ◽  
Acceleration Signal ◽  
Time Calculation

Abstract The paper encompasses the overview of hardware architecture and the systems characteristics of the Fraunhofer driving simulator. First, the requirements of the real-time model and the real-time calculation hardware are defined and discussed in detail. Aspects like transport delay and the parallel computation of complex real-time models are presented. In addition, the interfacing of the models with the simulator system is shown. Two simulator driving tests, including a fully interactive rough terrain driving with a wheeled excavator and a test drive with a passenger car, are set to demonstrate system characteristics. Furthermore, the simulator characteristics of practical significance, such as simulator response time delay, simulator acceleration signal bandwidth obtained from artificial excitation and from the simulator driving test, will be presented and discussed.

The Realization of μC/OS-II in BMS and its Performance Analysis

2012 ◽  
Vol 512-515 ◽  
pp. 2670-2675
Author(s):  
Yuan Bin Yu ◽  
Hai Tao Min ◽  
Xiao Dong Qu ◽  
Jun Guo
Keyword(s):  
Performance Analysis ◽  
Real Time ◽  
Electric Vehicle ◽  
High Reliability ◽  
Quantitative Comparison ◽  
Hardware Platform ◽  
The Real

μC/OS-II is one of RTOS which has remarkable advantages, such as high reliability, high real-time ability, and easy code scalability. This paper transplanted it into BMS on electric vehicle successfully which was based on MC9S12XDP512 MCU hardware platform. Using quantitative comparison under specific tests, this paper also verified the real-time and reliability advantages of μC/OS-II.

scholarly journals Analysis Tunneling IPv4 and IPv6 on VoIP Network

2018 ◽  
pp. 337-344 ◽  
Author(s):  
Muhammad Ismu Haji ◽  
Sugeng Purwantoro E.S.G.S ◽  
Satria Perdana Arifin
Keyword(s):  
Real Time ◽  
Packet Loss ◽  
Test Results ◽  
The Real ◽  
Ip Addresses ◽  
Internet Users ◽  
Jitter Delay ◽  
Ipv4 Address

Using of IP addresses is currently still using IPv4. Meanwhile, the availability of the IPv4 address is gradually diminishes. IPv4 has a limited address capacity. IPv6 was developed with a capacity greater than IPv4. Connect between IPv4 and IPv6 without having to interfere with the existing infrastructure. So, methods like tunneling are needed. Tunneling builds a way that IPv4 and IPv6 can communicate. 6to4 tuning makes IPv6 able to communicate with IPv4 over IPv4 infrastructure. Real time communication is needed by internet users to be able to connect to each other. One of the real time communications is VoIP. To find out the quality of tunneling implemented on a VoIP network, it will analyze QoS such as delay, packet loss, and jitter. Delay obtained is 20,01ms for IPv4, 19,99ms for IPv6 and 20,03ms for 6to4. Packet loss obtained 0,01% for IPv4, IPv6 0,01% and 6to4 0,08%. The obtained jitter is 7,96ms for IPv4, IPv6 7.39ms, and 8,48 for 6to4. The test results show that using IPv6 gets a better QoS value than using IPv4 and 6to4 tunneling. The results using 6to4 tunneling obtained the highest QoS value between IPv4 and IPv6. Implementation using 6to4 tunneling results in high results because, IPv6 packets that are sent are wrapped into the IPv4 form to get through the IPv4 infrastructure. 

An Approach to Supporting Synchronized Collaborative Design Within Heterogeneous CAD Systems

2004 ◽  
Author(s):  
Min Li ◽  
Shuming Gao ◽  
Jie Li ◽  
Youdong Yang
Keyword(s):  
Real Time ◽  
Collaborative Design ◽  
System Modeling ◽  
Object Oriented ◽  
Preliminary Test ◽  
Test Results ◽  
Cad Systems ◽  
The Real

This paper presents an approach to building up a synchronized collaborative design platform upon heterogeneous CAD systems. In the approach, Neutral Modeling Commands are used to achieve the real-time exchange of modeling operations between heterogeneous CAD systems. For the Neutral Modeling Commands, an object oriented representation is given and employed to support the translation between System Modeling Operations (SMO) and Neutral Modeling Commands (NMC). Moreover, two kinds of translators, SMO-to-NMC and NMC-to-SMO, are established, which can deal with modification/deletion operations and composite features and user-defined features besides common creation operations. The preliminary test results show that the proposed approach is promising.

Application of Variable Distance Photoelectric Sensor in Precision Automatic Sowing and Fertilization

2020 ◽  
Vol 15 (6) ◽  
pp. 707-713
Author(s):  
Hongchang Li ◽  
Fang Gao ◽  
Hehe Niu ◽  
Fang Chang
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
Single Chip ◽  
The Real ◽  
Modbus Protocol ◽  
Hardware System ◽  
Photoelectric Sensor ◽  
Variable Distance ◽  
Leakage Failure ◽  
Seed Metering Device

In order to realize the real-time monitoring of precision automatic seeding and fertilization, a monitoring system of precision automatic seeding and fertilization integrated machine based on variable distance photoelectric sensor is designed. In this system, STM32F103R8T6 single chip microcomputer hardware system is used as the lower computer to judge the running state of the machine. Through Modbus protocol, the received information is transmitted to the upper computer interface of MCGSTPC touch screen for real-time display. In the laboratory test, the designed seed metering device and fertilizer applicator can meet the requirements of wide precision sowing and wide uniform fertilization. All indicators can meet the requirements. In the field experiment, the phenomenon of seed leakage (fertilizer leakage) failure and response delay will occasionally appear. Moreover, the alarm accuracy of the monitoring system is more than 95%, and the response time of fertilizer missing, blocking and leakage is short. Therefore, the system designed in this study can realize the real-time and high-precision monitoring of precision automatic seeder, which is helpful to improve the quality of precision seeder.

Novel Method for ELISA Traces Pipetting System by Air Displacement Pipetting

2011 ◽  
Vol 103 ◽  
pp. 252-256 ◽  
Author(s):  
Lian Qing Zhu ◽  
Hong Li ◽  
Yun Xiao Na ◽  
Yang Kuan Guo ◽  
Ming Li Dong
Keyword(s):  
Real Time ◽  
Immunosorbent Assay ◽  
Pressure Sensor ◽  
Applied Pressure ◽  
Elisa Test ◽  
Liquid Level ◽  
Enzyme Linked Immunosorbent Assay ◽  
Test Results ◽  
The Real ◽  
Novel Method

In the Enzyme-linked immunosorbent assay (ELISA) test, many steps need traces pipetting. The ELISA test results will be different when we use different pipetting ways. Our traces pipetting system is based on the air displacement pipetting principle, comparable to the functioning of hand pipettes. It is applied pressure sensor to realize pressure-based liquid level detection (pLLD) and aspiration monitoring. The monitored system can distinguish the following situations: (1) a correct aspiration; (2) cup empty; (3) tip-blocked; (4) bubbles. Using the air displacement principle into traces pipetting can avoid contamination or dilution by system liquids, and problems with corroded tubing, pumps, etc. It applied pressure sensor to realize pLLD and aspiration monitoring. The results of the real-time monitor module on air displacement pipetting show that the traces pipetting system can agilely distinguish the different liquid pipetting situations. The method of air displacement pipetting offered an effective way for ELISA traces pipetting system.

A chess-playing robot control system based on Windows NT+RTX

Robotica ◽  
2004 ◽  
Vol 22 (3) ◽  
pp. 339-343 ◽  
Author(s):  
Jilin He ◽  
Ruqing Yang ◽  
Qunfei Zhao ◽  
Chunxiang Wang
Keyword(s):  
Control System ◽  
Real Time ◽  
Robot Control ◽  
System Software ◽  
Hardware Platform ◽  
Operation System ◽  
Windows Nt ◽  
Time Performance ◽  
Time Extension ◽  
Chess Playing

This paper presents the control system of a chess-playing robot developed by the Research Institute of Robots at the Shanghai Jiaotong University. Thanks to the Windows NT operation system and the RTX (Real-Time eXtension), the whole system can achieve good real-time performance. The control system, which is supported by a standard PC hardware platform and a modularized structure of system software, is open-ended and easily expansible.

A Chess-Playing Robot Based on SERCOS

2012 ◽  
Vol 271-272 ◽  
pp. 1536-1540
Author(s):  
Ji Lin He ◽  
Zhi Xian Chen
Keyword(s):  
Operating System ◽  
Control System ◽  
Real Time ◽  
System Software ◽  
Hardware Platform ◽  
Windows Nt ◽  
Time Property ◽  
Time Extension ◽  
Chess Playing

This paper presents a chess-playing robot and its control system based on SERCOS. Thanks to Windows NT operating system and RTX real-time extension, the control system is excellent in real-time property. The whole system, supported by a standard IPC hardware platform and a modularized architecture of system software, is open-ended and expansible. In addition, the chess-playing software makes a contribution to the excellent interaction between players and the chess-playing robot.

Improving model-based compensation method for real-time hybrid simulation considering error of identified model

2020 ◽  
pp. 107754632096162
Author(s):  
Zihao Zhou ◽  
Ning Li
Keyword(s):  
Time Delay ◽  
Transfer Function ◽  
Real Time ◽  
Hybrid Simulation ◽  
Compensation Method ◽  
Test Results ◽  
Two Stage ◽  
The Real ◽  
Model Based ◽  
Real Plant

Time delay is a critical and unavoidable problem in real-time hybrid simulation. An accurate and effective compensation method for time delay is necessary for the safety of real-time hybrid simulation and the reliability of test results. Generally, a model-based compensation method can be adopted, which is derived from the identified transfer function by assuming the latter can accurately represent the real plant. However, there must be some differences between the transfer function and the real plant. To facilitate the development of real-time hybrid simulation, we proposed a two-stage feedforward compensation method considering the error between the transfer function identified and the real plant. The compensation strategy proposed in this study was not only based on the transfer function but also introduced an error model as a second-stage compensation into a compensator to realize the synchronization of command and measurement. To verify the efficiency of the proposed method, comparisons in time domain and frequency domain with the feedforward compensator in a model-based feedforward–feedback control method were carried out. Compared with the feedforward compensator, the two-stage method achieved better tracking performance, especially in the high-frequency bandwidth. The test results verified that for a band-limited white noise of 0–30 Hz, the phase lag of the actuation system can be limited to ±5°. Finally, the two-stage method was applied to a real-time hybrid simulation of a two-story frame to illustrate its compensation effect on time delay.

scholarly journals Real-Time Production and Logistics Self-Adaption Scheduling Based on Information Entropy Theory

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4507 ◽  
Author(s):  
Wenchao Yang ◽  
Wenfeng Li ◽  
Yulian Cao ◽  
Yun Luo ◽  
Lijun He
Keyword(s):  
Real Time ◽  
Job Shop ◽  
Job Shop Scheduling ◽  
Cloud Manufacturing ◽  
Practical Significance ◽  
Shop Floor ◽  
Practical Case ◽  
Entropy Model ◽  
Time Model ◽  
The Real

In recent years, the individualized demand of customers brings small batches and diversification of orders towards enterprises. The application of enabling technologies in the factory, such as the industrial Internet of things (IIoT) and cloud manufacturing (CMfg), enhances the ability of customer requirement automatic elicitation and the manufacturing process control. The job shop scheduling problem with a random job arrival time dramatically increases the difficulty in process management. Thus, how to collaboratively schedule the production and logistics resources in the shop floor is very challenging, and it has a fundamental and practical significance of achieving the competitiveness for an enterprise. To address this issue, the real-time model of production and logistics resources is built firstly. Then, the task entropy model is built based on the task information. Finally, the real-time self-adaption collaboration of production and logistics resources is realized. The proposed algorithm is carried out based on a practical case to evaluate its effectiveness. Experimental results show that our proposed algorithm outperforms three existing algorithms.

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