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Parallel 3D Numerical Simulation of Continuous Detonation Engine on Graphics Processing Units

Procedia engineering 2013年 61卷 207-211页

作者： Liu Meng Zhang Shuang Wang Jianping State Key Laboratory of Turbulence and Complex System Department of Mechanics and Aerospace Engineering Peking University 100871 China School of Electronics Engineering and Computer Science Peking University 100871 China

Continuous Detonation Engine is a new concept of a supersonic combustion engine for aerospace. 3D numerical simulation of this engine determines the chemical combustion process and kinetic properties of reactive flow within the combustion chamber. To capture the Chapman-Jouguet detonation phenomenon, the grid size needs to be small than 250. The utilization of this fine grid requires a significant amount of computation workload to depict this combustion. With the help of NVIDIA's CUDA, the computation is discretized and distributed to multiple graphics processing units, which makes the computation time to be reasonable and tolerable. This paper introduces the architecture of NVIDIA's Tesla C1060 card and CUDA, showing the way to map our model into a CUDA programming and the performance of acceleration. It explicates the details of the movement within the engine. The result justifies that continuous detonation engine is a prominent propeller which releases massive impulse. Some problems of CUDA programming and future plan will also be discussed.

关键词： Continuous Detonation Engine 3D Simulation CUDA

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On variation of infinite horizon performance of model predictive control with varying receding horizon

On variation of infinite horizon performance of model predic...

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3rd IFAC Conference on Intelligent Control and Automation Science, ICONS 2013

作者： Cai, Xin Li, Shaoyuan Li, Ning Li, Kang Department of Automation Key Laboratory of System Control and Information Processing Shanghai Jiao Tong University Shanghai 200240 China School of Electronics Electrical Engineering and Computer Science Queen's University Belfast Belfast BT7 1NN United Kingdom

ISBN: (纸本)9783902823458

This paper investigates variation of infinite horizon (IH) performance of Model Predictive Control (MPC) without constraints as the optimization horizon changes. By exploring properties of the Difference Riccati Equations (DRE), an upper bound and a lower bound of the ratio between variation of IH performance of MPC and finite horizon (FH) optimal cost are obtained. The result shows the dynamic behavior of IH performance of closed-loop MPC systems as the optimization horizon varies. Copyright © 2013 IFAC.

关键词： Model predictive control

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A Novel Ground Bounce Reduction Technique using Four Step Power Gating

A Novel Ground Bounce Reduction Technique using Four Step Po...

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Students Conference on engineering and systems

作者： Yogesh kumar Shubham Paliwal Chandan Kr. Rai S. K. Balasubramanian Department of Electronics Engineering Indian Institute of Technology (BHU) Varanasi - 221005 India System Programmer in Computer Centre Banaras Hindu University Varanasi - 221005 India Department of Electronics Engineering Indian Institute of Technology (BHU) Varanasi -221005 India

ISBN: (纸本)9781467356282

The power gating is a technique to reduce leakage power in standby mode by using Sleep switch. In power gating, the circuit suffers the ground bouncing due to the switching of the Sleep Transistor from standby mode to active mode. In this paper, we have presented a four step power gating technique for further reducing the Ground/Power bouncing. This technique not only controls the bouncing but also controls the wake-up time and transition energy overheads in transition period. To control the wakeup time, pre-boosting and post-boosting current technique is applied by using two MOS transistors, limiting the discharge current and voltage swing in noise limiting stage. Application of proposed technique reduces 73% and 20% bounce noise as compared to conventional power gating and three step power gating techniques respectively. Simulations are carried out using 4-bit Ripple Carry Adder as low Vth logic circuit in Cadence Virtuoso simulation environment and UMC 0.18μm technology.

关键词： Novel Ground Bounce

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An efficient hybrid scheduling scheme for impatience user in eMBMS over LTE

An efficient hybrid scheduling scheme for impatience user in...

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International Conference on computer Communication and Informatics (ICCCI)

作者： Rochak Sachan Navrati Saxena Abhishek Roy Department of Electrical and Computer Engineering Sungkyunkwan University Suwon South Korea System Design Laboratory Telecom Systems Division Samsung Electronics Suwon South Korea

ISBN: (纸本)9781467329064

The 3 rd Generation Partnership Project - Long Term Evolution (3GPP-LTE) is the best choice for multimedia data transmission in demanding situation. The 3GPP LTE provides high data transmission rate between the User Equipment (UE) and Evolved Node B (eNB) with lower latency and better throughput. However, with the advancement and increasing traffic of data load, it is necessary to have data scheduling with user requests. In real life situations, mobile users become impatient when they don't receive their desired data. Moreover, the LTE Enhanced Multimedia Broadcast Multicast Services (eMBMS) does not provide any type of scheduling to measure and manage the impatient user request in multimedia broadcasting scenario. So, we consider this situation in our proposed scheme and simulated a new type of hybrid scheduling scheme to overcome this problem. It also takes care of the server anomalies arising from multiple requests sent by the same user for the same data.

关键词： Optimal scheduling Multimedia communication Quality of service Data communication computers Servers Informatics

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Human interest oriented heterogeneous multi-robot exploration under connectivity constraints

Human interest oriented heterogeneous multi-robot exploratio...

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IEEE International Conference on Robotics and Biomimetics

作者： Han Zhang Weidong Chen Jingchuan Wang Kang Li Department of Automation Key Laboratory of System Control and Information Processing Shanghai Electronics and Electrical Engineering and Computer Science Queen's University Belfast Belfast UK

ISBN: (纸本)9781479927456

Human interest input could greatly enhance the efficiency of the multi-robot exploration. However, most of the previous work did not take the intention of the operator into account. In this paper, a human interest oriented multi-robot exploration system is designed. The system is composed of a mobile base station and several robot explorers. A human interest oriented task allocation method is developed to enable these robot explorers to coordinate based on the operator's intention. Furthermore, an optimization index is proposed to balance the obedience, connectivity and explorability of the system; and the optimization problem is solved to generate the movements of the mobile base station and the robot explorers. Simulations and real-world experiments have demonstrate the effectiveness of the system and the efficiency of the exploration process.

关键词： Robot kinematics Base stations Optimization Resource management Equations Mobile communication

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Dual-injection-locked ½ divider with optimized VCO loaded Q and current

Dual-injection-locked ½ divider with optimized VCO loaded Q...

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National Conference on Communications (NCC)

作者： Sanghun Lee Sunhwan Jang Cam Nguyen System LSI Division Samsung Electronics Company Limited Suwon South Korea Department of Electrical and Computer Engineering Texas A and M University College Station TX USA

A new ½ dual-injection locked frequency divider (dual-ILFD) with wide locking range and low-power consumption is proposed and developed together with a divide-by-2 current mode logic (CML) divider. ½ CML divider is connected at the output of ½ dual-ILFD for achieving constant output amplitude. The chip was fabricated using a 0.18-µm BiCMOS process. The ½ dual-ILFD enhances the locking range with low-power consumption through optimized load quality factor (Q L ) and output current amplitude (i OSC ) simultaneously, achieving a locking range of 692 MHz between 7.512 and 8.204 GHz, which is almost 10 times larger than a single-injection counterpart. The core of ½ dual-ILFD consumes 2.93 mA with 1.5 V supply.

关键词： Frequency conversion Q-factor Phase locked loops Voltage-controlled oscillators Frequency synthesizers Impedance matching Semiconductor device measurement

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Gain-scheduling Distributed MPC for Polytopic Uncertain systems subject to Actuator Saturation

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IFAC Proceedings Volumes 2013年第13期46卷 444-449页

作者： Langwen Zhang Jingcheng Wang Kang Li Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 School of Electronics Electrical Engineering and Computer Science Queen's University Belfast UK

In this paper, we present a gain-scheduling distributed model predictive control (MPC) algorithm for polytopic uncertain systems subject to actuator saturation. A large-scale system is decomposed into subsystems and sub-controllers are designed independently. An invariant set condition is provided and a min-max distributed MPC strategy is proposed based on the invariant set. The distributed MPC controller is determined by solving a linear matrix inequality (LMI) optimization problem. An iterative algorithm is provided to coordinate the sub-controllers. A numerical example is carried out to demonstrate the effectiveness of the proposed algorithm.

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Sub-μs Synchronization Accuracy in Distributed Measurement system by PDA and PC triggers realignement

Sub-μs Synchronization Accuracy in Distributed Measurement ...

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IEEE International Instrumentation and Measurement Technology Conference

作者： F. Lamonaca D. Grimaldi R. Morello A. Nastro Dept. of Computer Science Modeling Electronics and System Science University of Calabria Rende - CS Italy Dept. of Computer Science and Electrical Engineering University "Mediterranea" of Reggio Calabria Italy Chemical Department of University of Calabria Rende - CS Italy

ISBN: (纸本)9781467346214

This paper deals with the synchronization of the measurement instruments cooperating in the distributed measurement system interfaced to the network node by wireless devices, Personal Digital Assistants or PC. The different hardware and software architecture of the wireless devices and PCs delays the triggering of the measurement instruments in unpredictable wide range that introduces a new problem respect to the case the node interfaces are all PCs or all wireless devices. The paper proposes the use of the Embedded Synchronizing Hardware (ESH) as middleware between the node interfaces and the measurement instruments to align the trigger signals. Suitably setting procedure of the ESH is pointed out based on the probability reduction that the unpredictable wide range of the delay occurs. Experimental results validate the suitability of the ESH to reach the sub-μs synchronization accuracy without dependence from the node interface.

关键词： PDA Synchronization Wireless Distributed Measurement Instrument Embedded Hardware

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Minimum energy multicast in static Wireless Ad Hoc Networks using swarm intelligence

Minimum energy multicast in static Wireless Ad Hoc Networks ...

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IEEE International Advance Computing Conference, IACC

作者： Sunita Prasad Zaheeruddin D. K. Lobiyal School of Electronics Centre for Development of Advanced Computing India Department of Electrical Engineering Jamia Millia Islamia University New Delhi India School of Computer and System Sciences Jawaharlal Nehru University New Delhi India

ISBN: (纸本)9781467345279

Energy is a scarce resource in WANETs (Wireless Ad Hoc Networks) since the nodes are powered by non-renewable batteries. Traditional multicast routing protocols are not energy aware and thus do not take energy conservation into consideration. One approach for energy conservation is to send the messages of a communication session along the routes which minimizes the total sum of the transmitter powers. Ant Colony Optimization (ACO) is swarm intelligence based method widely used for network routing. The main objective of this paper is to minimize the energy in multicast routing using the ant colony approach. The experimental results are very promising and show that the proposed algorithm is capable of finding minimum energy routes for most of the problems considered which are comparable to the state-of-art algorithms.

关键词： Mobile ad hoc networks Wireless networks Routing Energy efficiency Multicast communication Heuristic algorithms Conferences

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Hump phenomenon in transfer characteristics of double-gated thin-body Tunneling Field-Effect Transistor (TFET) with gate/source overlap

Hump phenomenon in transfer characteristics of double-gated ...

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IEEE International Nanoelectronics Conference (INEC)

作者： Hyun Woo Kim Min-Chul Sun Sang Wan Kim Byung-Gook Park Department of Electrical Engineering and Computer Science Inter-University Semiconductor Center (ISRC) Seoul National University Seoul South Korea TD Team System LSI Business Samsung Electronics Company Limited Yongin South Korea

Most of research groups have studied on Tunneling Field-Effect Transistors (TFETs) with assumption that there are no gate/source overlap and abrupt source/channel junction. In this work, we study the electrical characteristics of double-gated thin-body TFET with gate/source overlap and no abrupt source/channel junction. From transfer characteristics, hump phenomenon occurring with increasing gate bias is observed. This phenomenon affects the threshold voltage (V TH ), which worsens device matching and also makes it difficult to design logic circuits. The reason why tunneling current is suddenly increased is due to tunneling components in a direction normal to the channel. Theses hump phenomena are not seen in the previous TFET study using unidirectional nonlocal band-to-band tunneling model.

关键词： Nanoelectronics Conferences

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