The document describes the design of Eos III, a student-built paraffin-nitrous oxide hybrid sounding rocket. It discusses the rocket's propulsion subsystem, including the engine design which uses paraffin fuel and nitrous oxide oxidizer. Simulation tools and tests were used to optimize the engine design. The avionics subsystem provided sensor data and controlled launch sequences. A 1U CubeSat payload was also designed to be carried to 3km altitude and deployed. The rocket design was the result of careful simulation and testing as well as efficient organizational structure of the student team involved in its development.
Presentation by Clinton Dorris (Deputy Manager, Altair Project Office, NASA) at the Von Braun Memorial Symposium in Huntsville, Alabama, 21 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session2">http://astronautical.org/vonbraun/vonbraun-2008/session2</a>
Linear Static and Dynamic Analysis of Rocket Engine Testing Bench Structure u...IJERA Editor
This article presents a study of a testing bench structure for Rocket Engines, which is under development by the PUC-Minas Aerospace Research Group. The Bench is being built for civilian’s liquid bipropellant rocket engines up to 5 kN of thrust. The purpose of this article is to evaluate the bench structure using the Finite Element Method (FEM), by structural linear static and dynamic analysis. Performed to predict the behavior of the structure to the requests of the tests. The virtual simulations were performed using a CAE software with the Nastran solver. The structure is 979 x 1638 mm by 2629 mm, consisting of folded-plates (¼ "x 3¼" x 8") and plates of 1/4" and 1/2 ", both SAE 1020 Steel .The rocket engine is fixed on the structure through a set called engine mount. It was included in the analysis clearances or misalignments that may occur during tests. As well as, the load applied was evaluated with components in varying orientations and directions. It was considered the maximum size of the engine mount and the maximum inclination angle of load. At the end of this article it was observed that the worst stress and displacement values obtained were for the hypothesis with the inclination of five-degrees with load components in the positive directions of the axes defined and it was also obtained the first twenty frequency modes of the structure.
Presentation by Clinton Dorris (Deputy Manager, Altair Project Office, NASA) at the Von Braun Memorial Symposium in Huntsville, Alabama, 21 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session2">http://astronautical.org/vonbraun/vonbraun-2008/session2</a>
Linear Static and Dynamic Analysis of Rocket Engine Testing Bench Structure u...IJERA Editor
This article presents a study of a testing bench structure for Rocket Engines, which is under development by the PUC-Minas Aerospace Research Group. The Bench is being built for civilian’s liquid bipropellant rocket engines up to 5 kN of thrust. The purpose of this article is to evaluate the bench structure using the Finite Element Method (FEM), by structural linear static and dynamic analysis. Performed to predict the behavior of the structure to the requests of the tests. The virtual simulations were performed using a CAE software with the Nastran solver. The structure is 979 x 1638 mm by 2629 mm, consisting of folded-plates (¼ "x 3¼" x 8") and plates of 1/4" and 1/2 ", both SAE 1020 Steel .The rocket engine is fixed on the structure through a set called engine mount. It was included in the analysis clearances or misalignments that may occur during tests. As well as, the load applied was evaluated with components in varying orientations and directions. It was considered the maximum size of the engine mount and the maximum inclination angle of load. At the end of this article it was observed that the worst stress and displacement values obtained were for the hypothesis with the inclination of five-degrees with load components in the positive directions of the axes defined and it was also obtained the first twenty frequency modes of the structure.
Presentation by Phil Sumrall (Advanced Planning Manager, NASA) at the Von Braun Memorial Symposium in Huntsville, Alabama, 21 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session2">http://astronautical.org/vonbraun/vonbraun-2008/session2</a>
Presentation by Lawrence Williams (SpaceX) at the Von Braun Memorial Symposium in Huntsville, Alabama, 22 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session5">http://astronautical.org/vonbraun/vonbraun-2008/session5</a>
Design & Development of Articulated Inspection ARM for in House Inspection in...ijsrd.com
Magnetic confinement of plasma can be achieved using a device Tokamak. Concept of Tokamak confinement is also been tried to develop a fusion reactor. Reactor environment is of high hostile for human intervention due to radiation from activated atoms. For any kind of maintenance works Remote operation is necessary. An attempt was made to arrive at a concept of using articulated inspection arm to check the components if any damage or replacement required during shutdown operation of reactor machine. Proof of concept towards Design and development of articulated inspection arm for Torus Vessel was carried out & a robot having multi link joint with a camera mounted on the end point and also an arm having three degrees of freedom was attempted. The concept was materialized developing an articulated inspection robotic arm.
Presentation by Phil Sumrall (Advanced Planning Manager, NASA) at the Von Braun Memorial Symposium in Huntsville, Alabama, 21 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session2">http://astronautical.org/vonbraun/vonbraun-2008/session2</a>
Presentation by Lawrence Williams (SpaceX) at the Von Braun Memorial Symposium in Huntsville, Alabama, 22 October 2008.
<a href="http://astronautical.org/vonbraun/vonbraun-2008/session5">http://astronautical.org/vonbraun/vonbraun-2008/session5</a>
Design & Development of Articulated Inspection ARM for in House Inspection in...ijsrd.com
Magnetic confinement of plasma can be achieved using a device Tokamak. Concept of Tokamak confinement is also been tried to develop a fusion reactor. Reactor environment is of high hostile for human intervention due to radiation from activated atoms. For any kind of maintenance works Remote operation is necessary. An attempt was made to arrive at a concept of using articulated inspection arm to check the components if any damage or replacement required during shutdown operation of reactor machine. Proof of concept towards Design and development of articulated inspection arm for Torus Vessel was carried out & a robot having multi link joint with a camera mounted on the end point and also an arm having three degrees of freedom was attempted. The concept was materialized developing an articulated inspection robotic arm.
Lawrence Livermore National Laboratory
المحرك الصاروخي المعدل بقي حقيقه وقفزة علمية
بدأ اعتمادا علي المحاكاة فقط وصلا للنجاح وطبعا تحت مظلة وزاره الدفاع الامريكيه لتأمين الدعم اللازم و...
اضافة مؤثرة فعلا في تلك الصناعة
وأهم حاجه فيه ان الثرست زاد مع زياده الكفاءه ايضا ده غير ان الثرست نفسه بيعتمد علي الارتفاع
ده هيطور رحلات الذهاب >> والعوده!! كمان بشكل كبير
https://str.llnl.gov/november-2015/burton
Design improvement of mobile emulsion tankerLaukik Raut
The present investigation is an approach to enhance the outline of tanker. Thicker tanker builds the vehicle weight
because of this the quantity of shipments required to transport a similar measure of item. The fundamental target is to make the
ideal plan and enhance its capacity to withstand the powers. By giving the filet shape stresses will be disseminate all through and
configuration will safe. Initially the Cad model of existing tanker will be modeled after that FEA investigation will be perform
and plan of tanker will altering. Limit of the tanker has been keeping same (12,000 Ltr). After the examination might be the
thickness of tanker can be diminished because of this material cost of the tanker will decreased. By limiting the material same
measure of item might be transport.
Engineering Science and Technology, an International Journal 2TanaMaeskm
Engineering Science and Technology, an International Journal 22 (2019) 346–352
Contents lists available at ScienceDirect
Engineering Science and Technology,
an International Journal
journal homepage: www.elsevier.com/locate/jestch
Full Length Article
Design optimization of industrial robot arm to minimize redundant
weight
https://doi.org/10.1016/j.jestch.2018.11.009
2215-0986/� 2018 Karabuk University. Publishing services by Elsevier B.V.
This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
⇑ Corresponding author.
E-mail address: [email protected] (M. Karali).
URL: http://www.konya.edu.tr (M. Karali).
Peer review under responsibility of Karabuk University.
Mustafa Bugday, Mehmet Karali ⇑
Necmettin Erbakan University, Engineering and Architectural Faculty, Mechatronics Engineering Department, Konya, Turkey
a r t i c l e i n f o a b s t r a c t
Article history:
Received 6 January 2018
Revised 6 November 2018
Accepted 19 November 2018
Available online 8 December 2018
Keywords:
Robot arm optimization
Industrial robot
Finite element method (FEM)
In industrial robots, projected torque increases depending on the extending reach length and payload.
This requires selection of powerful motors particularly on the second axis. Since arm rigidity becomes
more important as the expected positioning precision increases, less flexible materials are used.
Therefore, during operation conditions, 70% of motor’s energy is used for redundant weight. In this study,
analyses conducted on five different robotic arms belong to different brands. Arm’s payload distribution
in terms of region and amount is examined, alternative designs are analysed and compared with each
other. Geometry and materials are changed in alternative designs. In this way, redundant weight is min-
imized (without increasing the share amount) at the same positioning precision. Results of this study
demonstrated a 10% decrease in inert payloads.
� 2018 Karabuk University. Publishing services by Elsevier B.V. This is an open access article under the CC
BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
1. Introduction deformations formed on the robotic arm. From those studies, Kur-
Servomotors are used in industrial robots because of their pre-
cise positioning control and stable structures and the cost of those
motors increases in proportion with their torque. A robot with a
lifting capacity between 5 and 7 kg has about 300 kg average
weight. Especially the second axis motor carries 70–75% of the
robot’s total weight. Considering the high acceleration of robot
arms, it will be better to use a more powerful motor. Therefore,
it is important to select a different material with same strength
or to change the geometric structure of the same material to get
a reduced motor load.
There are some other studies analyzed performance or effi-
ciency of robots by employing different criteria and methods
Pupaza et al. [1] r ...
This paper gives description about fuel used for various spacecraft.Spacecraft propulsion is based on jet propulsion as used by rocket motors. Propulsion in a broad sense is the act of changing the motion of a body. Propulsion mechanisms provide a force that moves bodies that are initially at rest, changes a velocity, or overcomes retarding forces when a body is propelled through a medium. Jet propulsion is a means of locomotion whereby a reaction force is imparted to a device by the momentum of ejected matter. The burning rate of the solid rocket propellants is one of the most important factors that determine the performance of the rocket. The burning rate of rocket motors running with solid propellant is called flame regression, which occurs with the ignition in the fuel grain perpendicular to the burning surface. This study investigates the effects of the addition of metal-based high-energy matter (Aluminium) into the content of the propellant produced within the scope of development project. The study starts with the manufacture of propellant samples.