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Closed-Loop Propulsive Control For Very Low Perigee Orbit Energy Management And Stabilization, Tyler J. Gardner 2020 Utah State University

Closed-Loop Propulsive Control For Very Low Perigee Orbit Energy Management And Stabilization, Tyler J. Gardner

All Graduate Theses and Dissertations

Within the past decade, the United States Air Force has begun exploring options for using smaller satellites, known as SmallSats and CubeSats, to decrease the time it takes to design and build new satellites. If used properly, a rapid development environment for satellites could improve the Air Force's ability to respond to new technologies and threats. Other organizations such as NASA and universities have been using SmallSats and CubeSats for research and development missions.

While smaller satellites are usually much cheaper to develop and require less time to create, limited volume strictly constrains the size of instrumentation and avionics ...


Finite-Strain Scale-Free Phase-Field Approach To Multivariant Martensitic Phase Transformations With Stress-Dependent Effective Thresholds, Hamed Babaei, Valery I. Levitas 2020 Iowa State University

Finite-Strain Scale-Free Phase-Field Approach To Multivariant Martensitic Phase Transformations With Stress-Dependent Effective Thresholds, Hamed Babaei, Valery I. Levitas

Aerospace Engineering Publications

A scale-free phase-field model for martensitic phase transformations (PTs) at finite strains is developed as an essential generalization of small-strain models in Levitas et al. (2004) and Idesman et al. (2005). The theory includes finite elastic and transformational strains and rotations as well as anisotropic and different elastic properties of phases. The gradient energy term is excluded, and the model is applicable for any scale greater than 100 nm. The model tracks finite-width interfaces between austenite and the mixture of martensitic variants only; volume fractions of martensitic variants are the internal variables rather than order parameters. The concept of the ...


Celebrating 90-Orbits Around The Sun, Stafford Air & Space Museum 2020 Southwestern Oklahoma State University

Celebrating 90-Orbits Around The Sun, Stafford Air & Space Museum

Programs

In celebration of the 90th birthday of Oklahoma astronaut and aerospace legend, Gen. Thomas P. Stafford, the Stafford Air & Space Museum in Weatherford, Oklahoma is offering free admission on September 17th, 2020.


Dynamic Interaction Between Manipulator And Omni-Directional Platform, G. R. Nikhade, DR. VISHWAS S. DESHPANDE, S. S. Chiddarwar 2020 Department of Mechanical Engineering, Shri Ramdeobaba College of Engg. and Mgmt., Nagpur, India

Dynamic Interaction Between Manipulator And Omni-Directional Platform, G. R. Nikhade, Dr. Vishwas S. Deshpande, S. S. Chiddarwar

International Journal of Applied Research in Mechanical Engineering

Recent advancements in mechatronics has led to tremendous development of application of robots for industrial applications involving high health hazards, rough working conditions and difficult to reach locations. Robot assisted welding is one such high risk operation for human being. The industrial arc welding robots are either mounted on the floor, table or on overhead rails. In this scenario, the jobs to be welded are brought to shop floor. However, the on-sight joining of big pipes and structures with precision and speed, demands for mobility of welding robot. In this research work, a novel concept of mounting 5-dof welding robot ...


Optimization Of Edm Parameters Using Integrated Approach Of Rsm, Gra And Entropy Method, SANJAY KUMAR MAJHI 2020 Department of Mechanical Engineering, Gyan Ganga Institute of Technology & Science, Jabalpur, India

Optimization Of Edm Parameters Using Integrated Approach Of Rsm, Gra And Entropy Method, Sanjay Kumar Majhi

International Journal of Applied Research in Mechanical Engineering

This paper presents a hybrid optimization approach for the determination of the optimal process parameters which maximize the material removal rate and minimize surface roughness & the tool wear rate. The input parameters of electrical discharge machining considered for this analysis are pulse current (Ip), pulse duration (Ton) & pulse off time (Toff). The influences of these parameters have been optimized by multi response analysis. The designed experimental results are used in the gray relational analysis & the weight of the quality characteristics are determined by the entropy measurement method. The effects of the parameters on the responses were evaluated by response surface ...


Multi-Objective Optimization For Design Of Single Row Layout In Flexible Manufacturing System With Scheduling Constraint:An Approach Of Nontraditional Optimization Techniques, K. MALLIKARJUNA 2020 BITM, Bellary

Multi-Objective Optimization For Design Of Single Row Layout In Flexible Manufacturing System With Scheduling Constraint:An Approach Of Nontraditional Optimization Techniques, K. Mallikarjuna

International Journal of Applied Research in Mechanical Engineering

Single row layout is one of the most usually used layout patterns in industries, particularly in flexible manufacturing systems. Here actual sequencing of machine and arrangement of parts, no doubt, have a great influence on the throughput of the flexible manufacturing system i.e., (F.M.S). This paper discusses the single row layout design in flexible manufacturing system (F.M.S). This paper furnishes the design, development and testing of simulated annealing technique and genetic algorithm to solve the single row layout problem by considering multi-objective i.e., minimizing the make span of jobs on all machines and minimizing ...


Analytical Modeling Of Planetary Gear And Sensitivity Of Natural Frequencies, MAJID MEHRABI 2020 Department of Mechanical engineering –Islamic Azad University-Takestan Branch

Analytical Modeling Of Planetary Gear And Sensitivity Of Natural Frequencies, Majid Mehrabi

International Journal of Applied Research in Mechanical Engineering

This work develops an analytical model of planetary gears and uses it to investigate their natural frequencies and vibration modes. The model admits three planar degrees of freedom for each of the sun, ring, carrier and planets. Vibration modes are classified into rotational, translational and planet modes. The natural frequency sensitivities to system parameters are investigated for tuned (cyclically symmetric) planetary gears. Parameters under consideration include support and mesh stiffnesses, component masses, and moments of inertia. Using the well-defined vibration mode properties of tuned planetary gears, the eigen sensitivities are calculated and expressed in simple exact formulae. These formulae connect ...


Vibration Analysis Of Planetary Gear System, MAJID MEHRABI 2020 Department of Mechanical engineering –Islamic Azad University-Takestan Branch

Vibration Analysis Of Planetary Gear System, Majid Mehrabi

International Journal of Applied Research in Mechanical Engineering

In this work a dynamic model of a planetary gear transmission is developed to study the sensitivity of the natural frequencies and vibration modes to system parameters in perturbed situation. Parameters under consideration include component masses ,moment of inertia , mesh and support stiff nesses .The model admits three planar degree of freedom for planets ,sun, ring, and carrier. Vibration modes are classified into translational, rotational and planet modes .Well-defined modal properties of tuned (cyclically symmetric) planetary gears for linear ,time-invariant case are used to calculate eigensensitivities and express them in simple formulae .These formulae provide efficient mean to determine the ...


Heat Transfer Enhancement Using Different Geometry Of Twist Tape Turbulators: A Review, INDRAKANT SINGH, DR. NILESH DIWAKAR 2020 Deptt. of Mechanical Engineering, Truba Institute of Engg. & Information Technology, Bhopal, MP, India- 462038.

Heat Transfer Enhancement Using Different Geometry Of Twist Tape Turbulators: A Review, Indrakant Singh, Dr. Nilesh Diwakar

International Journal of Applied Research in Mechanical Engineering

The development of high-performance thermal systems has increased interest in heat transfer enhancement techniques. The high thermal performance enhancement of heat exchanger systems is needed to use energy source efficiently due to the sky-rocketing prices of petroleum and coal fuels. Heat exchangers are widely used in industry both for cooling and heating. Insertion of turbulators in the flow passage is one of the favorable passive heat transfer augmentation techniques due to their advantages of easy fabrication, operation as well as low maintenance. The purpose of this review presents the effect of twisted tape turbulators on the heat transfer enhancement, pressure ...


An Intelligent Permeability Optimization System At Sinter Plant Of Rourkela Steel Plant, Ayan Goswami 2020 RDCIS, SAIL, Rourkela-769011

An Intelligent Permeability Optimization System At Sinter Plant Of Rourkela Steel Plant, Ayan Goswami

International Journal of Applied Research in Mechanical Engineering

The permeability of sinter mix is one of the vital parameters that affect the performance of sintering process. The amount of water added in the granulation drum has a significant effect on the permeability of the sinter bed and sinter machine productivity. Considering the variation in input feed materials and the parabolic nature of permeability-moisture curve, the optimum level of water addition is a difficult task for the operator to determine. Therefore a mathematical model based intelligent permeability measurement system is developed which determine the required amount of water to be added in granulation drum to achieve the optimum permeability ...


Target Hit Interceptor Mid-Course Guidance Scheme For Ballistic Missile Interception, N. PRABHAKAR, K. CHANDRA SEKHAR, V. VAIDIYANATHAN 2020 Defence Research & Development Laboratory, Hyderabad- 500 058

Target Hit Interceptor Mid-Course Guidance Scheme For Ballistic Missile Interception, N. Prabhakar, K. Chandra Sekhar, V. Vaidiyanathan

International Journal of Applied Research in Mechanical Engineering

A Mid-course guidance algorithm has been developed for an exo-atmospheric interceptor to neutralize an incoming high speed ballistic Target. The guidance scheme positions the interceptor ahead of the target so that the velocity vectors of the target and interceptors are in the same direction. As the interceptors used in ballistic missile defence have a lower velocity than the incoming target, the target approaches the interceptor. The guidance scheme reduces the closing velocity compared to a head on approach thereby increasing the homing time for a given terminal sensor detection range. The guidance law is validated through numerical simulation.


Formulation Of Mathematical Model For Maintenance Cost Of A Stone Crushing Plant Based On Dimensional Analysis And Multiple Regression, ANJALI J. JOSHI, DR. JAYANT P. MODAK 2020 Department of Mechanical Engineering, MIT Academy of Engineering, Alandi, Pune, India,

Formulation Of Mathematical Model For Maintenance Cost Of A Stone Crushing Plant Based On Dimensional Analysis And Multiple Regression, Anjali J. Joshi, Dr. Jayant P. Modak

International Journal of Applied Research in Mechanical Engineering

This paper presents the approach for the mathematical modeling of maintenance cost for the set up of new Stone Crushing Plant based on the dimensional analysis and multiple regression. Presented maintenance cost mathematical model is derived based on the generated design data. Design data is generated from actual design of all stone crushing plants followed by static and dynamic analysis. Estimation of design data is carried out based on the assumed plant layout. Dimensional analysis is used to make the independent and dependent variables dimensionless and to get dimensionless equation. Later, multiple regression analysis is applied to this dimensionless equation ...


Numerical Study On The Sensitivity Analysis For Strength And Stiffness Of Regular Cellular Solids, H.M SILVA 2020 Department of Mechanical Engineering, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal

Numerical Study On The Sensitivity Analysis For Strength And Stiffness Of Regular Cellular Solids, H.M Silva

International Journal of Applied Research in Mechanical Engineering

The aim of this study is to present a sensitivity analysis of geometric variables on the mechanical behavior of regular cellular solids. The cellular solids studied are named “spherical” and “elliptical”, if there is part of an empty sphere inside or if there is part of an empty revolved ellipse, respectively. Pure loads are applied separately, namely compression and shear, in order to study the influence of the variables on axial stress and axial displacement (compression) and shear stress and shear strain on shear. The sensitivity analysis is useful to establish limits for the studied variables in an optimization process ...


Fabrication Of Micro-Well In Pmma By Pcm And X-Ray Lithography, SACHIN BHOSALE 2020 Department of Mechanical Engineering, SVERI’s College of Engineering, Pandharpur, Pandharpur, 413304, India

Fabrication Of Micro-Well In Pmma By Pcm And X-Ray Lithography, Sachin Bhosale

International Journal of Applied Research in Mechanical Engineering

During the last decade there has been a rapid development in Micro-Fabrication Technology driven by the need for low-cost Micro-Components and Micro-Systems. Micro-Components will be required in a range of new products such as medical devices, Micro-Well, Micro-Pillar Micro-Fluidic Systems. Applications for Micro-Systems have stimulated innovative developments, created new markets and a demand for low-cost components. These are particularly important in manufacturing industries such as the automotive, chemicals, medical instruments, computer parts and telecommunication sectors. The drive towards miniaturization places is increasing demand for new techniques and novel processing technologies. This paper describes the Manufacturing of X-ray Mask with Photo-Chemical ...


Guided Pump-As-Turbine: Design And Development For Pico-Level Energy Generation, RITESH SINGH 2020 Mechanical Dep’t, IIT Delhi

Guided Pump-As-Turbine: Design And Development For Pico-Level Energy Generation, Ritesh Singh

International Journal of Applied Research in Mechanical Engineering

The Project- “Guided Pump as Turbine” aims to further research in the field of Pico Hydel Projects. This has been accomplished by building a prototype “Pump as Turbine” apparatus consisting of a centrifugal pump running as turbine to generate power. Along with these apparatus the centrifugal pump is converted to guided-pump where stator is appropriately introduced into the system. The purpose of this is to enhance the efficiency of the system. The project holds tremendous benefit by way of providing power/electricity to small communities dwelling in regions having potential for pico-scale hydel power exploitation. The development of the prototype ...


Design And Prototyping Of Envelope Pasting Machine, P.M. NIKHIL 2020 School of Mechanical Engineering, SASTRA University, Thanjavur, Tamilnadu-613401

Design And Prototyping Of Envelope Pasting Machine, P.M. Nikhil

International Journal of Applied Research in Mechanical Engineering

Envelopes are the basic means used for communication. They come in different shape and size. These are used for sending letters, parcel, admit cards for entrance exams, telephone bills, electricity bills, etc. Before sending these envelopes they have to folded and pasted which is done manually due to which lot of effort and time is wasted. This paper discuss the development of a machine that folds and paste the envelope thereby minimizing the human effort and time.


Thrust Force Analysis Of Spike Bell Nozzle, V. GOPALA DEVA KOWSIK 2020 Department of Aeronautical Engineering, Jeppiaar Engineering College, Chennai – 600119.

Thrust Force Analysis Of Spike Bell Nozzle, V. Gopala Deva Kowsik

International Journal of Applied Research in Mechanical Engineering

Aerospike nozzle is often described as an inside-out bell shaped nozzle and named for its prominent spike located at centre. This project mainly focuses on design of various types of nozzles such as aerospike, truncated aerospike and spike bell nozzles. In theoretical approach, the efficiency of rocket nozzles is calculated with design parameters such as throat area, exit area, chamber pressure and so on. From theoretical approach it is inferred that the spike bell nozzle has an increased value of thrust when compared to other nozzle types. So meshing and internal flow analysis is carried out for spike bell nozzle ...


Euler Angle Error Computation And Thrust Vector Control Scheme For Initial Turning Phase Of A Vertical Launch Surface To Air Missile, RAM B. SANKAR 2020 Directorate of Systems, Defence Research and Development Laboratory, Hyderabad, India

Euler Angle Error Computation And Thrust Vector Control Scheme For Initial Turning Phase Of A Vertical Launch Surface To Air Missile, Ram B. Sankar

International Journal of Applied Research in Mechanical Engineering

A vertical launch missile requires to be turned towards the Predicted Interception Point (PIP) with the target within few seconds from the launch. The autopilot used for the same requires the error in Euler Angles between the missile and the target to be supplied, which is generally computed using Error Quaternions approach [1]. For some kinds of engagement scenarios, say a Near Boundary Low Altitude target, the turn angle required in the pitch plane during the initial phase can become more than 90 degrees. In such cases, the conventional 3-2-1 frame transformation method fails to compute the Euler Angle errors ...


Evaluation Of S.I.F For Crack Emanating At 450 Orientation From A Hole In Pressurised Cylinder Using Fea, D.A AKASH. 2020 Department of Mechanical Engineering, S.J.C Institute of Technology, Chickaballapur, INDIA

Evaluation Of S.I.F For Crack Emanating At 450 Orientation From A Hole In Pressurised Cylinder Using Fea, D.A Akash.

International Journal of Applied Research in Mechanical Engineering

The use of fracture mechanics techniques combining with Finite Element Analysis [F.E.A] in assessment of performance and reliability of pressure vessel structure is on demand .The machine elements with cylindrical profile such as cylindrical shells, which are used extensively as the structural configuration in aerospace and shipping industries needs to be leak proof. But during their service life, a crack may initiate on internal/external boundary of circular cylinder which influences on stress distribution in the structure. All flaws in a physical structure may not always have the same orientation relative to boundaries and material interfaces. In fracture ...


Analysis Of Flow Through A Double-Acting Impeller With A Straight Radial Blades Using Cfd, SUTHEP KAEWNAI, Somchai Wongwises 2020 Department of Mechanical Engineering, Faculty of Engineering, King Mongkut’s University of Technology Thonburi, Bangmod, Bangkok 10140, Thailand

Analysis Of Flow Through A Double-Acting Impeller With A Straight Radial Blades Using Cfd, Suthep Kaewnai, Somchai Wongwises

International Journal of Applied Research in Mechanical Engineering

This study aims to analyze water flow through a centrifugal pump with straight radial blades double-acting impeller using computational fluid dynamics (CFD). The impeller analyzed was designed with the following conditions: a volume flow rate of 33.5 m3/h, head of 100 m, rotational speed of 2,950 rpm, and specific speed of 9. The first stage began with calculations for various dimensions of double-acting isolated impeller and impeller-collector assembly, followed by three-dimensional drawing and domain specification. In the second stage, grids for the isolated impeller and impellercollector assembly were generated. In the third stage, the initial conditions and ...


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