Designing Definition and 577 Threads

Homework Statement Design, giving the necessary ratings and characteristics necessary for the transformer, bridge rectifier, reservoir capacitor and regulator, a 12 V, 2 A regulated power supply. Also identify any heat sink requirements. The available mains supply is 230 V ±10% @ 50 Hz...

110kg sounding rocket that runs on apcp im trying to understand the steps to building this rocket what equations do i use to find nozzle parameters and estimated burn time etc. initial surface area for the fuel block is 5020cm^2 burn rate is .6 to 1.2mm a second fuel weight is 100kg gamma for...

this is my very first project, and we haven't even tackled this lesson yet, but the time period is really short so i want to start ahead as early as i can and read some reference books about it. my proffessor wants me to design an AC to DC power supply with the specifications of ripple 5%, DC...

I am a quality control engineer in an automotive parts manufacturing company. One of our products is a rocker arm bearing which is essentially a cam follower. The OD and ID of the bearing is ground using CBN grinding wheels. The ID contains cylindrical rolling needles. Recently we have received...

Hi, I've had obtained a mathematical model for the slip controller issue. As you see I have the diffequation for the slip. and the input that force the system to zero error is provided as well. Now it's time to implement it in simulink or matlab. I took a look at the example provided on...

Hey everyone, I'm new here and I hope I can get some help with this! I recently decided to start the no doubt long and painful process of teaching myself physics in order to pursue a lifelong obsession of mine, that being outer space / planetary science. I don't seek a formal education in this...

Hi to all! I´m Kai from Finland and me and my step dad are working to make an OBD system for 1970´s Chrysler vehicles. The company itself made one during the era and we would like to have same kind of system, only with 2010 equipment. (so no fridge- size computer for my shop) We´ve solved most...

Hi everyone. I'm designing a steady state feedback H2 control system. Actually, my major is tribology and I have no experience in designing control system. So it is really big problem for me. Anyway, this is my simple model of tribometer which applies normal load on the surface. (is it...

Hello everyone! I want to design a rectangle vacuum chamber (12x12x72) out of 1/2 steel. I would be welding the sides together to form a seal. Would this work? any suggestions on what I could do? Thx! (I not great at this stuff so your help is much appreciated!)

Hi all, First post, be gentle... I'm trying to build a system based on the MIT Actuated Workbench. They used electromagnets with the following spec: 1.9cm (0.75”) diameter x 3.8cm (1.5”) length, wound with 32-gauge copper wire with a total length resistance of 120-122 ohms, with no metal...

As an electrical engineer, I am an amateur on optics, but I really could use some help. I am making a lens of PMMA, 2D. To 'convert' a rotary movement into a sweep. The lens needs to be 120mm long, with its focus at a max distance of 80mm the light traveling out of the lens needs to be parallel...

Hi guys, how do I design the haunch for the cantilever beam? The slab area is relatively small, with 125thk ( 4.39m x 1190m ). I've looked through everywhere but I can't find on how to design the haunch. I'm using BS 8110. Thanks.

I'm looking into how cryostats are designed. There's an absolute wealth of information on how they work; less about how design choices are made. So I'm giving it a go myself, but I'm stuck on pretty much the first hurdle. I'd like the cryostat to have a boil off rate of helium of ##50##ml/hr...

Homework Statement Draw the logic circuit to represent the following Boolean expression using only NAND gates: Homework EquationsThe Attempt at a Solution Is this correct? Thanks

Homework Statement You are asked to design an airplane propleller to turn at 2400 rpm. The forward airspeed of the plane is to be 75.0 m/s, and the speed of the tips of the propeller blades through the air must not exceed 270 m/s. What is the maximum radius the propeller can have? With this...

I love mechanical design engineering I think I'd love quantum physics when I get into it would like to completely reinvent how to produce radio waves by looking at the breakthroughs that created that technology

Homework Statement We have been asked to design an investigation into transformers. The equipment list given is: coils of wire, iron core, ammeter, voltmeter, loudspeaker, signal generator and an oscilloscope. Homework EquationsThe Attempt at a Solution I know that you could investigate how...

For my physics assignment we have to design and test a way to allow an egg to fall from a three storey building and not crack. The only requirments are the egg must be visible in atleast one place and the smallest design wins. I tried making a crumple area and then protecting the egg with...

I plan on going into the weapons engineering field and I want to design tanks. Either the armor or the gun. Both fascinate me and I was just wondering, what is the best minor to mechanical engineering for both career options? Materials for the armor and electronic for the gun?

Hello, me and other engineering students at my university are designing an electric aircraft and we are hoping to implement the technology that NASA is currently working on, http://www.nasa.gov/press-release/nasa-electric-research-plane-gets-x-number-new-name Basically how it works is you have...

Hello Guys, I'm building a vertical wave machine. I have a big bearing [2] (more like an eccentric) which is rotating by an electric motor with a constant speed of 0.359 rad/sec. When 3/4 of the bearing touches bearing [1] it supposed to rotate it a 1/4 turn, which as a result the ladder with...

Hey, didn't know where to turn and thought this might be a good start. I've been designing a world for the last six years based of the four Greek elements; earth, air, water, fire and H'teal. (Transfer and absorption of biological energy, life and death combined) The main three bad and good...

I want to design a digital butterworth lowpass filter of nth order, with only freedom of choice to user being order of the filter and the cut off frequency, i already have a 1st order low pass. Code: T = 1/(2*pi*this.fc); this.A = -1/T; this.B = 1/T; this.C =...

Homework Statement You have been employed but(sic) the Mathematics Football League (MFL) to design a football. Using the volume of revolution technique, your football design must have a capacity of 5L ± 100mL. You must present a statement considering the brief below. Just a quick side note, I...

25 years experience of machine design and manufacturing, not research.

Hello, i am a junior mechanical engineering student and i was given the task of designing (on paper) a gearbox. I chose to design a worm gear single speed reduction gearbox. I know the basics of what composes it which are the worm, worm gear, input and output shaft bearings and the housing the...

Homework Statement I have a math project due in a month. The topic i chose to present was second order differential equations, so i felt like making a driven spring mass system to demonstrate resonance and nice things like that. I have a few questions about materials and design and such and...

Hello, My aim is to build a small reflecting sundial as designed by Sir Isaac Newton. I found from a website that it consists of a ceiling and a small mirror. What I want to know is how it works, the concepts behind it and how to build one. It's for an undergraduate project that I've got...

I have a signal that comes from a computer of phone line-out and I would like to amplify or apply analog filters. I am not sure what considerations I need to make in the design. What type of load should I present to the phone? What are the signal levels? Input or output impedance? Is there a DC...

Hello, I want to design a mechanism for tilting an air hose (not more than 10 kg) to a desired angle (anywhere between 0 and 90 degrees depending on operating conditions) and holding it there. I've tried googling this up but just can;t find what I was lookin for. Then I searched for...

im stuck on figuring out how to design a capacitor bank i have nothing to start with, its part of a project, and i want its input to be 12v (storage). im trying to google capacitor banks and trying to simulate my own using pspice but i keep getting floating nodes and missing resistors or...

Hello everyone, I am designing a ship for my sci fi story and I need input regarding the shield. I am trying to make my story as hard sci fi as I can get away with. The story takes place a few centuries from now and details the first expedition to Alpha Centuri. The ship will have a cruising...

Hi All I'm designing a pneumatic filling machine and I'm looking for this parts in the photo attached so please can anyone knows where can i found it? Thank You

I was wondering how to approach building a bridge which must lie across to points of differing points (one end is elevated 5 cm off the ground), meaning the bridge lies at an angle across a 35cm expanse. How would you calculate the forces exerted on each member if the bridge does not lie...

Autodesk Inventor, Solidworks, and CATIA. I don't know which one are better to design an aircraft ? Which one should i pick for a beginner ?

Hello all, This might sound very optimistic for a project but I want to design a thermonuclear fusion reactor. Does anyone know how I can calculate the required plasma current I need in order to start a thermonuclear fusion process? I am using a mixture of Deuterium-Tritium gas. Thanks!

I need to trigger an electric imp to wake from deep sleep on the event that a liquid level sensor is exposed to water and send an alert to a user. This device periodically wakes up out of a deep sleep state and connects to a server to log sensor data (temp, humidity, light, water level in the...

Hi, Can anybody suggest a good book that discuss low voltage electrical switching hardware like circuit breakers, motor starters, automatic tranfser switches..etc? I can't seem to find any book that focuses on this.

Hi again, just curious as to whether it is possible to use DDL (Data definition, i.e., non-GUI ); more specifically to add something to the usual create table statements to express the relation between tables, i.e., these tables being either in 1:1, M:1 or M:N relation (so that a new, bridge...

So, I'm building an rc plane for school that has to theoretically be able to fly on Mars. What differences/limitations are there compared to designing a regular remote controlled plane? This is for a terraformation project, so at this point Mars would have an atmospheric pressure of 50kPa.

Homework Statement A rule often used in shaft design states that the angle of twist shall not exceed 1° on a length equal to 20 diameters. What stress in the material does this imply if the modulus of rigidity is equal to 80 × 103 N/mm2 ? Homework Equations T/J=Gθ/L=τ/r J=π?32(D^4-d^4)[/B]...

hello, I'm designng a f1 car,,, we are using a duke 390 engine...we are using a chain differential... now I'm trying to make the sprockets. to make this sprockets i need to know its dimensions.. that is sprocket teeth diameter width etc... so, I'm very much confussed with it. how to get this...

Hi everyone: I wanted to design a 2-dimensional gravity simulator as part of a larger research project. I wrote it in Python using numpy to store positions, velocities, and accelerations, and matplotlib to display the trajectories; code is available upon request. In order to solve the problem...

Hi, i am a student of bachelors of mechanical engg. (2nd year). I want to build a go cart. But i don't know the basics. I don't know a thing about automobiles. I am learning the catia software for designing. But i don't know what kind of "calculations for go cart" must be required to design the...

I am working in a group for designing a LED interactive Screen. My part of the project is the design of the music visualization system. I am new in this area, but I know I need to use some op-amps to filter the input signal from the mp3 player. Could anyone give me any suggestions on how to...

I want guideline to design house wiring. Also need an application by which the design diagram can be digitized.

I have troubles for designing a 3 phase inverter, and I cannot find the formula everywhere...

My name is Vamsi and I am from India. I am currently pursuing Ms in ME at University of Houston-Houston-Texas-USA. I have taken a course called "space vehicle design" in which we need to form a team and do a project of our choice. My team project is "Designing a space capsule to carry...

Homework Statement I need to design a steel pole in 3 segments.The base segment needs to be 25 ft high , the second segment needs to be 15 ft and the third one 10ft high.So that when mounted on top of one another their total height will be 50 ft.Their diameters need to be within 1.6-7 inches...

Hi guys, My science teacher gave me a project to design a robot for a specific planet. I must also include what materials the robot were to be made of. Unfortunately the planet I received has very hostile conditions 1. Temps of -1000 degrees C. Do not ask my why my planet is colder than 0K (3...