Engineering Commons^™

Research On Interoperability Between Tena And Certain Command & Control System, Zhihua Dong, Yuanchang Zhu, Yanqiang Di, Xianguo Meng

Journal of System Simulation

Abstract: The heterogeneity prevents systems from the interoperability between C2 system and TENA for inter-connection in test community. Message Transfer Service contains End-to-End deployment mode and Cross-Network deployment mode, respectively there being two Inter-architecture with TENA system. Gateway can be designed to be single-threaded or multi-threaded. From the perspective of interoperability Gateway realizes the interoperability between communication protocols, object models and supporting services. Cooperation mechanism is designed to achieve the interoperability between the communication mechanism of pull mode in TENA and in C2P; meta-model of Message with OWL, and the object model interoperability is realized through model conversion; self-defined …

Research On Simulation Of Manufacturing Grid Resource Allocation Based On Scale Free Network, Xiangbin Zhang, Yanyan Li

Journal of System Simulation

Abstract: In order to study the variation of resource allocation efficiency in manufacturing grid, the manufacturing grid resource allocation network model was established based on scale free network theory taking the manufacturing resource characteristics such as distribution and diversity into account. By calculation of the statistical indicators of complex networks and attribute functions, the appropriate resource allocation scheme was selected to realize global optimal resources allocation. Using this model and evaluation index of resource allocation, the variation rule was figured out that explained how resource allocation efficiency varied with structural evolution of manufacturing grid through analyzing the data from simulation …

Modelingrandom Kelvin Cell Micro-Structure For Open-Cell Foam And Its Application On Compression Response Of Open-Cell Aluminum Foam, Minju Qi, Guangfa Gao

Journal of System Simulation

Abstract: It is very difficult to model an applicable microstructure for the open cell foams. Using the Python scripting language and the commercial code ABAQUS, the structures for regular Kelvin cell, regular Kelvin open cell foams and random Kelvin open cell foams were designed and modeled automatically. The methodology for modeling, the design and implement for the key algorithms in the process of modeling were presented. For the open cell Aluminum foam, the regular Kelvin cell open cell model and the random Kelvin cell open cell foams model were developed, respectively, and the mechanical responses of them under quasi-static …

Design Of Micro-Strip Antenna Based On Step-Like Electromagnetic Band-Gap Structure To Improve Bandwidth And Gain, Zhigang Xiao, Jiang Yao, Shaoquan Yin

Journal of System Simulation

Abstract: Design of a micro-strip antenna based on electromagnetic band-gap structure can significantly improve the bandwidth and gain of the antenna. EBG structure is used to suppress the surface wave propagation and increase the radiation gain of the antenna. At the same time, the antenna substrate thickness increase is beneficial to expand the bandwidth of the antenna. According to the actual need, the EBG and the antenna can use diffident substrate. The method can replace the traditional choke ring antenna and significantly reduce the antenna size without sacrificing the performance of the antenna.

Man-Machine Coordinated Intelligent Flight Path Planning Algorithm, Ren Peng, Xiaoguang Gao

Journal of System Simulation

Abstract: Man-machine coordinated flight path planning of UAV low-altitude penetration is a key technology achieving manned and unmanned aerial vehicles cooperative combat. The algorithm of man-machine coordinated intelligent flight path planning was proposed, combining artificial auxiliary decision with novel intelligence algorithm, a chromosome integer code with changeable length based on angle was used to represent flight path. Human’s wisdom and experience could make up for the lack of intelligence algorithm. In the most dangerous environment, it made the best possible use of the human brain to guide solution procedures of the flight path planning on pop-up threats. A …

Research On Model And Simulation Of Bullwhip Effect In Supply Chain Based On Pid, Hebing Zhang

Journal of System Simulation

Abstract: Under the uncertainty of market demand, the method exponential smoothing was utilized to forecast the real demand, coupled with information sharing and PID control theory. Four kinds of ordering models were established under different backgrounds, including the ones with or without information sharing, further on, based on the PID control respectively. A comparing of values was obtained by the simulation examples of corresponding bullwhip effect. Through the research, it is found the impact of PID control is better than that of information sharing on weakening the bullwhip effect, which is fit for the condition without information sharing. PID …

Controller Design For Hypersonic Vehicle Based On Kalman Filter, Tao Chao, Jianliang Ai

Journal of System Simulation

Abstract: For a generic hypersonic vehicle with unstable longitudinal and lateral-directional mode, considering the three dimensional turbulence and their gradient, all states linear dynamic equations were established. All states H_∞ feedback control was proposed based on the discrete Kalman filter when three dimensional turbulence and system measurement noise were taken into consideration. In this way, state estimation created by the Kalman filter to the H_∞ controller was delivered. This method could guarantee the robustness when external atmospheric turbulence and itself parameter matrices perturbation caused by the flight condition variation existed. The results show that for both the nominal …

Non-Uniform Axial Force Precise Modeling And Simulation Of Recycled Aggregate Concrete Confined By Steel Tube Column, Wenxian Feng, Yunchao Tang, Zhang Ye, Cai Yang, Dingjing Bao, Jinmu Hu

Journal of System Simulation

Abstract: According to the complexity of non-uniform axial force on recycled aggregate concrete confined by steel tube column, precise modeling and simulation on non-uniform axial force were put forward, mechanic properties of axial force under uniform and non-uniform conditions were analyzed, and its three-dimensional model and force model were established. Then impact of load capacity was analyzed, such as geometric diameter, loading condition, and deformation during production. Force simulation and experimental results fit relatively well. It turned out that uniform axial load capacity was greater than concentrated eccentric axial load capacity. Besides, eccentric axial load capacity was related to eccentricity. …

Simulation Of Grid-Connected Solar Micro-Inverter Based On Fuzzy Pi Controller And Feed-Forward Compensation, Weiliang Liu, Changliang Liu, Huichao Zhang, Yongjun Lin, Liangyu Ma

Journal of System Simulation

Abstract: Grid-connected solar micro-inverter is a highly nonlinear and time-varying system, so it is difficult to achieve good control effect using traditional PI controller. Small signal analysis model of micro-inverter was established, grid-connected current control strategy composed of fuzzy PI controller and grid voltage feed-forward was put forward, and the initial parameters of PI controller was optimized using the genetic algorithm. Simulation results show that the control strategy has the virtues of good robustness, small dynamic deviation, and could reduce the harmonic content of grid-connected current.

Research On Component-Based Modeling Of Combat Simulation Entity, Guohong Du, Wei Wei, Luyao Li

Journal of System Simulation

Abstract: According to the fact that combat simulation entity models built by traditional modeling method lack of standardization and reusability, based on analysis and induction of combat simulation entity factors, component-based modeling method of combat simulation entity was brought forward. Meanwhile, entity management mechanism of using “scheme-unit-entity-component” and model interaction mechanism of message-derived, event-subscribed and event-dispatched were discussed. The component-based modeling method will provide technique support to build excellent combat simulation entity model and standardizing the development of combat simulation entity model to avoid low-level duplication.

Error Correction Methods In Numerical Simulation For Unilateral Constraint Dynamics, Haitao Gao, Yali Han, Youxiong Xu, Songqing Zhu, Zailuo Wu

Journal of System Simulation

Abstract: Aiming at problem of calculation errors and constraint violation in numerical simulation for dynamics of unilateral constraint such as contact and collision, the error projection correction methods were put forward. On the basis of dynamical behavior of unilateral constraint described by linear programming model, mixed linear complementarity dynamics was built. Numerical simulation methods for the mixed linear complementarity dynamics were derived. In order to reduce calculation error and constraint violation caused by this error in the numerical simulation, an error correction method was built for correcting position and velocity error of numerical solution on the base of bilateral …

Improved Strategy To Reduce Common-Mode Voltage For Matrix Converter, Weizhang Song, Li Xi, Minyuan Li, Yanru Zhong

Journal of System Simulation

Abstract: Aiming at the large instantaneous common-mode voltage in traditional space vector modulation strategy for two-stage matrix converter (TSMC), on the basis of analyzing the laws of common-mode voltage, an improved modulation strategy to reduce common-mode voltage was proposed. To suppress common-mode voltage effectively, in this strategy, the rectification stage sector was subdivided into twelve sectors from six sectors, according to the sector of the reference current vector and dc-side voltage, the switching points of inverter stage were redefined and reallocated, and zero vector of inverter was selected and distributed reasonably, instantaneous maximum value of common-mode voltage was reduced to …

Control Law Research And Design Of Large Commercial Civil Aircraft For Oscillatory Failure, Ziyu Yao, Jianliang Ai

Journal of System Simulation

Abstract: The oscillatory failure often occurs because of the electronic equipment failure or the structure vibration in the modern commercial civil aircraft. The solution to the problem needs lots of sensors and control controllers and it make the control structure complex and leads to further fault. The mathematical model including the servo loop was built and the analytical redundancy was used for the fault detection. A combined control law was designed based on the detection result that was the residual of the servo signal and the state quantities. The design improves the control structure of the EFCS feedforward channel …

Research On Motion Control Technology Of Virtual Human’S Lower Limb Based On Optical Motion Capture Data, Liang Feng, Zhili Zhang, Xiangyang Li, Zhibo Tang, Ma Chao

Journal of System Simulation

Abstract: As passive-optical motion capture equipment could only capture the motion information of human’s key joints, a simplified skeleton structure model of virtual human was introduced; and then the error sources of motion data of virtual human were analyzed according to the acquisition process of optical motion capture data based on the skeleton structure model. Focusing on the problem of poor continuity of motion process of virtual human’s lower limb caused by continuity deficiency of motion capture data, a motion control method was proposed to strengthen the control of motion process of virtual human, which included data smoothing of motion …

Servo Load Simulator Based On Improved Wavelet Neural Network, Wang Chao, Rongzhong Liu, Yuanlong Hou, Gao Qiang, Wang Li

Journal of System Simulation

Abstract: In order to prevent the surplus torque of servo load simulator which had influence in the performance of the torque load, an intelligent controller was put forward based on the improved self-learning functional expansion wavelet neural network. The Bang-Bang control is used when the error is big, and if the error is small, function expansion based on wavelet neural network and fuzzy compensation control is used; At the same time, the improved differential evolution algorithm is for estimating the parameters of the controller. Considering the computational complexity and performance of the control system, the number of hidden neurons …

Modeling And Simulation For Target Tracking System Based On Dual-Pan-Tilt Camera, Kaishun Xiahou, Shanxing Chen, Yilin Wu

Journal of System Simulation

Abstract: Mathematical model of each component of target tracking system based on dual-pan-tilt camera was established. The rotation angles both in horizontal and vertical direction of each pan-tilt and the relative position of two cameras were adopted to estimate the real-time position of moving target with Extended Kalman Filter (EKF) tracking algorithm. A new real-time calibration method for pan-tilt camera was proposed to deal with the calibration problem that the external parameters of camera changes as the pan-tilt rotates in the process of camera modeling. In addition, the target’s image feature, extracted from the projected point on the camera image …

Attribute Reduction Algorithm On Balancing Profit And Risk, Dexing Wang, Jielong Xu, Hongchun Yuan

Journal of System Simulation

Abstract: Usually it is taken for granted to achieve the maximal profit at the cost of the minimal risk. It is an important problem of how to balance profit and risk, considering introducing profit and risk to attribute reduction so as to find practical algorithms in decision-making process. A decision-theoretic model was built, which could balance profit and risk combining with decision-theoretic rough set model and minimum risk of Bayes decision and find optimal combinations of risk in a certain level of expected profit, then a heuristic algorithm of attribute reduction was proposed, which took the function of balancing …

Fractional Order Internal Model Control Of Pmsm Speed Servo System, Zhicheng Zhao, Sang Hai, Jinggang Zhang

Journal of System Simulation

Abstract: A design method of fractional order (FO) internal model controller for permanent magnet synchronous motor (PMSM) speed servo system was proposed. The simplified mathematical model of speed servo system was built. Based on internal model control (IMC) principle, the FO internal model controller was deduced by using the FO filter to replace the integer order one. The proposed controller contained only two adjustable parameters, and the defects of the fractional PI^λD^μ controller tuning method were effectively overcome. Moreover, the dominant pole was selected according to the time domain performance indicators of the system, and an analytical …

Modeling And Simulation Of Urination Assist System Driven By Ultrasonic-Vaporized Steam, Li Xiao, Huaizhou Zhou, Zhichao Shi, Ting Guan, Yuansong Xiao

Journal of System Simulation

Abstract: Aiming at the problem of assisting the neurogenic bladder micturating, a novel urination assist system driven by ultrasonic-vaporized steam was proposed. The mathematical model of the multi-field coupling relation between the external ultrasonic controlling parameters and the urine flow rate of urinary bladder was built using ultrasonics, thermodynamics and fluid mechanics theories. The simulation analysis of the influence of the controlling parameters on the urine flow rate performance of the system was conducted. The results show that the urine flow rate are mainly affected by the ultrasonic sound intensity, frequency, radiation area and time, as well as the system …

Gpu-Accelerated Simulation For Class Of Multi-Agent Based Models, Zhao Yuan, Jiachang Cheng, Wang Lu, Yueming Hu

Journal of System Simulation

Abstract: A parallel agent-based model of Von Thünen Model was proposed driven by graphics processing units (GPUs). The Von Thünen Model often involved the simulation of large numbers of geographically located individual decision-makers and a massive number of individual-level interactions. This simulation required substantial computational power. GPU-enabled computing resources provided a massively parallel processing platform based on a fine-grained shared memory paradigm. This massively parallel processing platform held considerable promise for meeting the computing requirement of agent-based models of spatial problems. A dynamic relationship table rebuilding method was proposed to enable the use of GPUs for parallel agent-based modeling of …

A Scoring Model To Evaluate Offshore Oil Projects: Case Of Eni And Mellitah Oil & Gas, Abdulhakim Giadedi

Dissertations and Theses

Offshore oil projects have many different and unique characteristics, such as larger project size, higher number of scopes, and higher complexity. In fact, offshore oil projects described as mega projects are ones that require significant assessment and acquisition methods in order to reduce risks and failures. Traditionally, cash flow analysis and return on investment are the most known factors to evaluate offshore oil projects. However, there are several other internal and external factors that affect the overall performance of offshore oil projects. A comprehensive approach and advanced tools are required to evaluate these factors that can have a significant impact …

Analog Statistical Design For Manufacturability, Yu-Shan Wang

Dissertations and Theses

The manufacturing yield, overkill, and defect level limit the feasibility of analog circuits in SoCs. The conventional method of handling process and environmental variation is to assign a design margin such that the design meets specifications at several processes and environmental corners. However, checking only extreme corners limits performance in comparison to the more rigorous statistical approach of the computing manufacturing and quality figure of merit. The statistical approach requires transistor-level simulation of hundreds or even thousands of samples, not just a few corners, and thus is very time consuming.

This research offers a method for reducing the time required …

Theoretical And Experimental Validation Of A Cubesat's L-Band Communication System, Evangelos Mastrogiannis

Dissertations and Theses

An L-band uplink communication system was designed and validated in the lab for a CubeSat satellite operating in low Earth orbit (LEO). This paper investigates communication link analysis, discusses the design strategy for an inexpensive CubeSat receiver operating in L-band with a moderate power Earth station transmitter, and validates the link budget with prototype hardware using an anechoic chamber.

A receiver's required carrier-to-noise ratio (CNR) establishes the basis for a link budget. The requirement for a digital communication link is set by the bit-error-rate (BER) requirement of a chosen communication protocol which is inversely related to the energy per bit …

Application Of Industrial Red Mud, Shubhajit Bala

Manipal Institute of Technology, Manipal Theses and Dissertations

Red Mud is solid waste, brick red in colour is a by-product of Bayer process of alumina production. About 1 to 1.5 tonne of red mud is produced from production of 1 tonne of alumina. The waste generation is in huge quantity and methods for management of waste is not followed properly. It leads to spreading & leakage of Red Mud in environment. Hence, conversion of red mud to a valuable product was especially important. The main aim was conversion of Red Mud into valuable product. The potential of red mud for various applications like Magnetic Slime, Car batteries & …

"Identification And Characterization Of Genetic Determinants In Bacteria Involved In Froth Formation At Natural Water Bodies", Swathi A

Manipal Institute of Technology, Manipal Theses and Dissertations

Industrialization, modernization, rapid urbanization, and unscientific disposal of inadequately treated sewage and effluent from the various source into surface water bodies has been a major concern leading to water pollution. Frothing of lakes and foam related issues is one such emerging environmental concern in South India. Although several researchers have dealt with the characterization of physical and chemical parameters to understand the mechanism of foam formation, the role of biotic factors has been largely ignored. The main objective of this project is to identify the bacteria present in the froth forming lakes, to identify and characterize the biosurfactant of the …

Cost Effective And Non-Intrusive Occupancy Detection In Residential Building Through Machine Learning Algorithm, Chenli Wang

Engineering Ph.D. Theses

Residential and commercial buildings consume more than 40% of energy and 76% of electricity in the U.S. Buildings also emit more than one-third of U.S. greenhouse gas emissions, which is the largest sector. A significant portion of the energy is wasted by unnecessary operations on heating, ventilation, and air conditioning (HVAC) systems, such as overheating/overcooling or operation without occupants. Wasteful behaviors consume twice the amount of energy compared to energy-conscious behaviors. Many commercial buildings utilize a building management system (BMS) and occupancy sensors to better control and monitor the HVAC and lighting system based on occupancy information. However, the complicated …

Efficacy Of Enzymatically Induced Calcium Carbonate Precipitation In The Retention Of Heavy Metal Ions, Arif Ali Baig Moghal, Mohammed Abdul Lateef, Syed Abu Sayeed Mohammed, Kehinde Lemboye, Bhaskar C. S. Chittoori, Abdullah Almajed

Civil Engineering Faculty Publications and Presentations

This study evaluated the efficacy of enzyme induced calcite precipitation (EICP) in restricting the mobility of heavy metals in soils. EICP is an environmentally friendly method that has wide ranging applications in the sustainable development of civil infrastructure. The study examined the desorption of three heavy metals from treated and untreated soils using ethylene diamine tetra-acetic acid (EDTA) and citric acid (C₆H₈O₇) extractants under harsh conditions. Two natural soils spiked with cadmium (Cd), nickel (Ni), and lead (Pb) were studied in this research. The soils were treated with three types of enzyme solutions (ESs) …

Effects Of Solid Lubricants On Properties Of Al-Si-Sic Composite Powderproduced By Gas Atomization Technique, Haris Rudianto, Sang Sun Yang, Yong Jin Kim, Ivo Dlouhy, Wahyu Caesarendra

Journal of Metals, Materials and Minerals

Al-Si-SiC composites powder was analyzed in this research. The powder was made by gas atomizing process. Powder characterization was done to observe its morphology, particle size distribution and thermal properties. Effects of lubricants were intensively investigated in this research with compositions and pressure variables. It is assumed that higher amount of solid lubricant put into the powder, the lower ejection force needed to take out compacted powder. Finding appropriate solid lubricant is necessary to improve green and sintering properties. EBS (ethylene bis stearamide), aluminum stearate, zinc stearate and paraffin wax were used for investigation. Sintering under ultra high purity nitrogen …

Evaluating The Potential Of Drone Swarms In Nonverbal Hri Communication, Kasper Grispino, Damian Lyons, Truong-Huy Nguyen

Faculty Publications

Human-to-human communications are enriched with affects and emotions, conveyed, and perceived through both verbal and nonverbal communication. It is our thesis that drone swarms can be used to communicate information enriched with effects via nonverbal channels: guiding, generally interacting with, or warning a human audience via their pattern of motions or behavior. And furthermore that this approach has unique advantages such as flexibility and mobility over other forms of user interface. In this paper, we present a user study to understand how human participants perceived and interpreted swarm behaviors of micro-drone Crazyflie quadcopters flying three different flight formations to bridge …

Me-Em 2019-20 Annual Report, Department Of Mechanical Engineering-Engineering Mechanics, Michigan Technological University

Department of Mechanical and Aerospace Engineering Annual Reports

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