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Total Ionizing Dose Effect and Failure Mechanism of digital signal processor

Chinese Journal of Electronics 2021年第5期30卷 986-990页

作者： YU Xin LU Wu LI Xiaolong LIU Mohan WANG Xin SUN Jing GUO Qi Xinjiang Technical Institute of Physics and Chemistry Laboratory of Solid State Radiation Physics

Ionizing radiation effect and failure mechanism of digital signal processor(DSP) is studied through test-board and automatic test equipment to find the relationship between system function failure and parameter degradation. Static bias is more sensitive than dynamic bias when DSP is tested on-line during radiation. Core current, high-Z leakage current and timing parameter are sensitive to ionizing radiation. No enhanced low-dose-rate sensitivity is found by comparing experiment results under high and low dose rate *** memory interface and Timer are deduced to be the sensitive module by step radiation and analysis basing full parameter test in Verigy 93000. The timing parameter degradation have a strong correlation to these module functions. And the degeneration mechanism is analysed on inverter through Hspice simulation which indicate the leakage circuit caused by radiation can lead a delay to the digital signal propagating. The parasitical capacitance among long connections make it worse to the data transmission around DSP, field programmable gate array and memory. Then an early function failure occurs in test board than Verigy 93000. This work provide support to systematic radiation hardness design and hardness assurance/lot acceptance testing in space applications.

关键词： Verigy 93000 analysis basing full parameter test digital signal propagating radiation effect radiation effects DSP external memory interface leakage currents early function failure leakage circuit test board sensitive module system function failure high dose rate radiation static bias automatic test equipment timing parameter degradation low dose rate radiation field programmable gate array enhanced low-dose-rate sensitivity digital signal processor degeneration mechanism systematic radiation hardness design radiation hardening (electronics) field programmable gate arrays integrated circuit testing ionizing radiation dynamic bias module functions step radiation digital signal processing chips failure mechanism test-board

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Enhanced Portable LUT Multiplier with Gated Power Optimization for Biomedical Therapeutic Devices

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Computers, Materials & Continua 2020年第4期63卷 85-95页

作者： Praveena R Faculty of Electronics and Communication Engineering Muthayammal Engineering CollegeRasipuram637408India

digital design of a digital signal processor involves accurate and high-speed mathematical computation *** units are one of the most power consuming and memory occupying *** are the common building blocks in most of the DSP units which demands low power and area constraints in the field of portable biomedical *** research works attempts multiple power reduction technique to limit the power dissipation of the proposed LUT multiplier unit.A lookup table-based multiplier has the advantage of almost constant area requirement’s irrespective to the increase in bit size of *** gating is usually used to reduce the unnecessary switching activities in idle circlet components.A clock tree structure is employed to enhance the SRAM based lookup table memory *** LUT memory access operation is sequential in nature and instead of address decoder a ring counter is used to scan the memory contents and gated driver tree structure is implemented to control the clock and data switching *** proposed algorithm yields 20%of power reduction than existing.

关键词： Lookup table digital signal processor SRAM FPGA FFT flip flop

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digital control of pulsed gas metal arc welding inverter using TMS320LF2407A

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China Welding 2008年第1期17卷 75-80页

作者：吴开源黄石生李星林吴水锋 School of Mechanical Engineering South China University of Technology

A digital control of pulsed gas metal arc welding inverter was proposed. A control system consisting of analogue parts was replaced with a new digital control implemented in a TMS320LF2407A DSP chip. The design and constructional features of the whole digital control were presented. The resources of the DSP chip were efficiently utilized and the circuits are very concise, which can enhance the stability and reliability of welding inverter. Experimental results demonstrate that the developed digital control has the ability to accomplish the excellent pulsed gas metal arc welding process and the merits of the developed digital control are stable welding process, little spatter and perfect weld appearance.

关键词： pulsed gas metal arc welding inverter digital control digital signal processor TMS320LF2407A

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Position Sensorless Control for Permanent Magnet Synchronous Motor Using Sliding Mode Observer

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Transactions of Tianjin University 2005年第5期11卷 338-342页

作者：陈益广傅涛李响 School of Electrical and Automation Engineering Tianjin University

An approach of position sensorless control for permanent magnet synchronous motor （ PMSM ） is put forward based on a sliding mode observer. The mathematical model of PMSM in a stationary αβ reference frame is adopted, and the system is controlled by the digital signal processor （ DSP; TMS320LF2407 according to the control achieve closed loop operation of the motor, the stator theory of sliding mode observer. In order to magnetic field should be vertical with the rotor magnetic field and be synchronous with rotor rotating, so the position and speed of PMSM is estimated in real time and the estimated position is modified continuously. The simulation results indicate that the proposed observer has high precision is more robust to the parametric variation and load in estimation of PMSM position and speed, and torque disturbance.

关键词： permanent magnet synchronous motor position sensorless control sliding mode observer digital signal processor

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Artificial Neural Network Maximum Power Point Tracker for Solar Electric Vehicle

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Tsinghua Science and Technology 2005年第2期10卷 204-208页

作者： Theodore Amissah OCRAN 曹军义曹秉刚孙兴华 Research and Development Center for Electric Vehicle Xi’an Jiaotong University Xi’an 710049 China

This paper proposes an artificial neural network maximum power point tracker (MPPT) for solar electric vehicles. The MPPT is based on a highly efficient boost converter with insulated gate bipolar transis- tor (IGBT) power switch. The reference voltage for MPPT is obtained by artificial neural network (ANN) with gradient descent momentum algorithm. The tracking algorithm changes the duty-cycle of the converter so that the PV-module voltage equals the voltage corresponding to the MPPT at any given insolation, tempera- ture, and load conditions. For fast response, the system is implemented using digital signal processor (DSP). The overall system stability is improved by including a proportional-integral-derivative (PID) controller, which is also used to match the reference and battery voltage levels. The controller, based on the information sup- plied by the ANN, generates the boost converter duty-cycle. The energy obtained is used to charge the lith- ium ion battery stack for the solar vehicle. The experimental and simulation results show that the proposed scheme is highly efficient.

关键词： artificial neural network maximum power point tracker (MPPT) photovoltaic module digital signal processor solar electric vehicle

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Structural design of morphing trailing edge actuated by SMA

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Frontiers of Mechanical Engineering 2013年第3期8卷 268-275页

作者： Qi WANG Zhiwei XU Qian ZHU State Key Laboratory of Mechanics and Control of MechanicalStructures Nanjing University of Aeronautics and Astronautics

In this paper,the morphing trailing edge is designed to achieve the up and down defection under the aerodynamic *** a detailed and accurate computational analysis to determine the SMA specifcations and layout programs,a solid model is created in CATIA and the structures of the morphing wing trailing edge are produced by CNC machining.A set of DSP measurement and control system is designed to accomplish the controlling experiment of the morphing wing trailing *** last,via the force analysis,the trailing edge is fabricated with four sections of aluminum alloy,and the arrangement scheme of SMA wires is *** of precise control integral has been performed to survey the control *** experiment consists of defection angle tests of the third joint and the integral ***,the ultimate defection angle is tested in these two ***,the controlling experiment of different angles could be performed within this *** results show that the defection error is less than 4%and response time is less than 6.7 s,the precise controlling of the morphing trailing edge is preliminary realized.

关键词： morphing wing trailing edge shape memory alloy digital signal processor PID algorithm

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TMS32010数字信号处理器的系统设计与应用

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东南大学学报(自然科学版) 1987年第4期 143-148页

作者：孙临秋汪茂南京工学院无线电工程系

一、TMS32010主要特点 TMS32010是一种新型的数字处理芯片,内部有16×16的硬件乘法器、32比特字长的算逻运算单元ALU、144个数据寄存器以及移位寄存器、辅助寄存器、堆栈和指令计数器等。TMS32010封装在40腿的DIP中,它的寻址能力为4K,... 详细信息

一、TMS32010主要特点 TMS32010是一种新型的数字处理芯片,内部有16×16的硬件乘法器、32比特字长的算逻运算单元ALU、144个数据寄存器以及移位寄存器、辅助寄存器、堆栈和指令计数器等。TMS32010封装在40腿的DIP中,它的寻址能力为4K,对外数据字长为16比特。 TMS32010共有60条指令,可归纳为6类,即累加器操作指令18条;辅助寄存器及数据器指针操作指令7条;程序分支指令13条;T寄存器、P寄存器及乘法指令8条;中断控制及状态寄存器控制指令9条;I/O及存贮器操作指令5条。TMS32010的机器周期为200ns。

关键词： vocoders real-time processing simulators digital signal processor assembler.

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Design and Development of the DTC Induction Motor Drive for Electric Vehicle

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Journal of Beijing Institute of Technology 2000年第4期9卷 415-421页

作者：孙逢春程夕明北京理工大学车辆与交通工程学院北京100081

The design and development of the traction controller for electric vehicle is introduced, which is based on the induction motor. This drive is developed by using a digital signal processor at low cost and carried out with the module design concept of both software and hardware. Nevertheless, a scheme of the sensorless direct torque control is based on the developed hardware, of which the feasibility is tested by a trial program. Additionally, both the interface function of the drive hardware and the feasibility of its software are proved to be good by the trail programs. A test motor can run about 18?r/min by a variable frequency program with the space vector pulse width modulation technology, of which the torque is visible pulsatile. In this presentation, based on the theoretical approach, the sensorless torque control is to be studied and applied to electric vehicles, of which the quick, smooth and stable torque response is emphasized because it quite benefits improving the drive performance of electric vehicles.

关键词： electric vehicle induction motor digital signal processor direct torque control

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Implementation of GPR signals De-Noising Based on DSP

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Wuhan University Journal of Natural Sciences 2005年第6期10卷 1005-1008页

作者： CHEN Xiao-li TIAN Mao ZHOU Hui-lin School of Electronic Information Wuhan University Wuhan 430072 Hubei China

An important issue of ground-penetrating radar （GPR） signals analysis is de-noising thai is the guarantee of acquiring good detecting effect. The paper illustrates a successful application of digital single processor （DSP） based on wavelet shrinkage algorithm. In order to realize real-time GPP, signals analysis, some key issues are discussed such as the realization of fast wavelet transformation, the selection of CPU chip and the optimization of data movement. Experimenial results show that the DSP based application not only basically meets the real-time requirement of GPP, signals analysis, but also assures the quality of the GPR signals analysis.

关键词： wavelet shrinkage de-noising GPR digital signal processor real time soft thresholding SNR

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A New Cochlear Prosthetic System with an Implanted DSP

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Journal of Semiconductors 2008年第9期29卷 1745-1752页

作者：麦宋平张春晁军王志华清华大学电子工程系北京100084 清华大学微电子研究所北京100084

This paper proposes a cochlear prosthetic system with an implanted digital signal processor （DSP）. This system transmits voice-band signals with a low data rate through the wireless link, free of the data-rate limitation and suitable for future development. By optimizing the speech processing algorithm and the DSP hardware design, the implanted DSP manages to execute the continuous interleaved sampling （CIS） algorithm at a clock frequency of 3MHz and a power consumption of only 1.91mW. With an analytic power-transmission efficiency of the wireless inductive link （40%）, the power overhead caused by the implanted DSP is derived as 2.87roW,which is trivial when compared with the power consumption of existing cochlear prosthetic systems （tens of milliwatts）. With the DSP implanted,this new system *** easily developed into a fully implanted cochlear prosthesis.

关键词： cochlear prosthesis low power algorithm optimization digital signal processor power-transmission efficiency

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