Design Definition and 1000 Threads

You've finished with your garden planet and vacation planet, now you want to do something creative.

I am inspired to design civilian submarines for underwater tourism. I want to design a low-cost submarine that will increase accessibility of the underwater world to people who don't have too much money. I think that new materials are needed that will be cheaper but still serve their function...

HAI EVERYONE i have designed a circuit for emg detection but its not working perfectly. may i know the parameters that to be considered in each stages and what should be the value of each parameters in each stages. (e.g. gain at IN stage =20). thank you..

Hello :) (sorry for the bad english, but i really am in need of help) I currently attend a mechanical school in Austria and have to design a new clamping unit for a lid. The circular lid is loaded with a force of 60kN (the force acts on the center) and clamped with 4 units. The currently...

Hello everyone, I am Ashish, a mechanical engineering graduate from Arizona. I am doing a case study on some of the design related flaws in a high purity germanium detector. The information and pictures that I am posting is of an old detector from one of the manufacturers and it is currently...

Hey Everyone, I am starting a new job in a few weeks. I have EE background with strong academic and professional background in power electronics, digital hardware design, control systems and low frequency analog circuit design (<100 kHz). I always joke around that I am an full stack hardware...

Homework Statement [/B] I am to design a 600mL water bottle by drawing one side (bottle lying horizontally). Three types of functions must be included (different orders). The cross-sectional view would be centred about the x-axis, and the y-axis would represent the radius of that particular...

I would like to have some electronics magazines from about 2001 to present. When I was an engineer in the electronics industry I received EDN, Electronics Design, and Electronic Component News. Any of those would work. A few from each year would be fine. Let me know what you have and terms...

Hi, May someone helps me regarding this!? i have a controller which will control AC motor as attached. in this controller, a stage comes where I need to use a Derivative Block before point 'B' as shown in the attached picture " controller block diagram" [...

I want to to the same as in this master thesis but it doesn't work for me. In the Link on Page 76 you see 2 IDTs on YZ Lithiumniobat. It is cut through in the middle and an example of Lithiumniobat is put on top between the left and the right side, like in the picture. I just did the same but i...

What I meant in the title is Theoretical Physicist (character limit). A year ago, when I decided to get a Physics bachelor degree, I was 100% sure I'm going to do theoretical research. Since high school, I was always searching stuff about particle physics, relativity and other topics on the...

HI, i have a first order controller (ts/ks+k) which contain some oscillations and its settling time is very huge, i wanted the controller to have settling time of 10seconds and remove the oscillations. in order to remove the noise and get the expected settling time i added a filter ( s/cs+1)...

I'm trying to work out what velocity and magnetic field strength one needs to capture the charged particle in a circle of comfortable lab size - say 5cm ( 0.05m). For a sodium ion ( mass = 3.8175407 × 10-26 kg) with charge q = 1.60217653 x 10 -19 , velocity 183234 m/s, C in a magnetic field...

Homework Statement My problem deals with understanding why we substitute in the reaction kinetics equivalent into mass conservation equation instead of dealing with differentials Homework Equations From the conservation of mass law about an envelope: $$\frac{dm}{d t} = \sum m_{in} - \sum...

Homework Statement Homework Equations I made the calculation and i got an unrealistic solutions, I hope that someone could help me with it. ;)

I am building a Cockcroft-Walton accelerator for a science fair project, so how does this design sound? Starting from the top, there is a polished steel terminal, like a VDG terminal. Inside here is the proton source and power supply to the source (the source is a hydrogen discharge tube) . The...

Hello, is there anyone who knows how WEG managed to get IE4 efficiency rating for their motors while keeping Aluminum for cage on rotor? http://ecatalog.weg.net/tec_cat/tech_motor_sel_web.asp# Best regards

Hello guys. In the picture below can u help me with the problems! I cannot understand what exactly should I comment about the strengths. I t would be easier if it was asking about the types of welding :) . Please give some help! Thanks in advance!

I can't find equations for wall thickness or required temperature to generate steam at 6000psi. The goal here is a pressure vessel 'cylinder' 30" diameter, 36" long. It will be used to pump 42000psi hydraulics using a piston pump directly driven to a smaller series of pistons to allow the...

Hi. I'm working on a science fiction story about colonization of the solar system. Asteroid way stations are an important part of the story. I want to construct a realistic scenario about how we could convert the Eros asteroid into a shuttling habitat in it's current orbit (or something close...

What circuit design is used to ensure that the renewable energy source does not begin to absorb energy from the grid (for instance, when its terminal voltage drops below the distribution line voltage)?

im wanting to hang a cabinet off an I-beam (steel) in my basement looking at something like this http://www.standsandmounts.com/ionicofficeseriestiltswivelhingedextendingceilingmount-luna-ceiling102.aspx function wise, but also want an up/down (range of 2-3ft, from touching ceiling to droping...

Homework Statement Homework Equations The Attempt at a Solution [/B] Which is the correct frequency response graph for this question? The first graph or the second one?

If i have atm temperature around 32 deg Celsius, volumetric flow 6000m3/h, fluid temperature inlet 47 deg Celcius. How to get minimum possible dimension for my canal if its maximum possible length is 180 m and fluid temperature outlet at least 40 deg Celcius?

Homework Statement The block diagram of FIGURE 3 shows a three-stage asynchrononous counter that is used to count a series of randomly occurring input pulses. The ‘Q’ outputs of the counter are used to drive a logic circuit that gives the output shown in TABLE 1. (a) Design the counter using...

Hi there, we have a NMR spectrometer equipped with a standard bore 54mm cryomagnet working at 14.1 T (600 MHz Larmor Frequency) produced by Oxford. I would implement a special probe capable of generating a RF pulse and reading a NMR answer from a sample that is not standard for such...

In the above presented dynamo design, three snapshots taken during three instances during the rotor running. In fig 1 the approaching magnet builds an induced voltage across the coil, however the circuit is still open, hence no current flows. In fig 2 when the rotor reaches TDC (top...

Hello, I have metrology in my 4 semester in Bachelor's of Engineering in Mechanical Engineering. However, the books that we get (Engineering Metrology, R.K Jain,) give only a brief principle of how the instruments work. I want to further my study of this subject with an intention to design...

What i need are the ff: basic guidelines on how to create an outdoor antenna (you can send links :)) the most suitable type of antenna that can receive 70 MHz tv station frequency. The antenna will be mounted less that 3 m from the ground. computations that i need to know (you can also send...

Homework Statement Homework Equations Lens equation 1/f = 1/d_o + 1/d_i Minimum Gaussian beam spot 2*w_0 = ((4 * lamda * F)/(pi * D)) Where: w_0 = beam waist (half beam diameter) lambda = wavelength F = focal length of lens D = diameter of incoming spot Don't forget to match units. Let...

Hi everyone! I am a soon-to-be graduate of the Technical University of Munich and work in the field of Computer-Aided Engineering (CAE) – looking to exchange experience and ideas on CFD, FEA,Thermal Analysis and their applications in product design!

I am trying to make a EFT generator in low cost which can generate bursts specify by IEC61000-4-4. The circuit which I am working on is given as below. This is for making a high voltage of atleast 400V. I got this design from a paper. But it is not mentioned the values of R1 and R5. I am not...

Hello, Physics forum community.I have a project for an intro to engineering class in which I must design a system to solve an environmental problem. This class is only an introduction so I'm not sure how detailed and specific our work has to be. I must have been feeling very sci-fi at the time...

Hi everybody Does anyone familiar with this equation? Acceleration resistance, = {(load MOI/mech. efficiency) + (motor MOI) x rpm^2} / {3.65 x 10^5 x acceleration time} = {(kgm^2/ƞ) + (kgm^2) x rpm^2} / {3.65 x 10^5 x second} = final value unit is in kilowatt (kW) It used to calculate the...

Afternoon every one. I am a first year engineering student in NZ, For my midterm break report I have to design and make a catapult that can meet these specifications. - hit one target within a 0.1 m radius of a target that is 1 m away horizontally from the base of the model catapult. - hit one...

Hi guys... appreciate if somebody can help me on the design calculation of the RTG crane... I am stuck to understand the following formulas, used by MITSUBISHI to calculate as follow: 1. Moment of inertia for hoisting = [Lifting weight (kg) x Lifting velocity^2 (m/min)^2] / [π^2 x motor rpm^2]...

I had read a few helpful forums on the pros and cons of going for a masters vs. phd in nuclear engineering. However, I am still confused about one thing. I am considering pursuing a career in reactor design (fission or fusion, will likely make another post to discuss this). Here are my...

I want to design the installation of a 500KVA Distribution Transformer to supply a neighborhood in Nigeria. The Existing National Grid voltage is 11KV. I want input from you guys to add to my sizing/costing. Inputs: 1. Sizing of XLPE Cable 2. Sizing of Transformer HV Protection ( Current Rating...

Homework Statement Design a series RLC filter for 10kHz using an 0.01mF capacitor. Homework Equations / 3. The Attempt at a Solution how would the circuit actually look if drawn out here? [/B]

I am working om multilayer hybrid plasmonic waveguide (Si-SiO2-Ag_SiO2-Si). I have to see effect of roughness on propagation length and other parameters. So in reference to that I am having some doubts: 1) I use CST microwave studio for numerical simulation. I am not getting any direct option...

Hey guys, I know this is a bad question but I would love to know how. Usually, in the examples, the loads are given as UDL where you can to find same reaction at both ends of beam. What if the beam loadings are with multiple point loads, (5 or 6 point load) and the reaction of the beam at both...

My background is in physics so I have a very basic understanding of circuit design. I was just wondering, If someone were to design a printed circuit board (from scratch) how do they know that it will function the way it should? and also how do they know that the printed circuit board will...

Hi, I'm trying to do a very simple analysis on Simulink where I am applying a speed to a Permanent Magnet Synchronous Generator with a purely resistive load. I'm not familiar with PMSGs so the results I'm getting don't really make any sense to me. Could anyone go through some simple design...

I would like to start building small electrical projects but it's been a very long time since I studied circuit analysis in college. I figured that there are probably some computer programs that would help people like myself to design simple circuits. A quick Google search led me to this site...

I am working on a switch mode psu in step down configuration with the key components being: LM2592 (adj) http://www.ti.com/lit/ds/symlink/lm2592hv.pdf 530-PC-24-1000 http://www.mouser.com/ds/2/643/PC-594199.pdf GSIB-25 http://www.vishay.com/docs/88646/gsib25xx.pdf Using a slightly modified...

how can i design a flyback transformer for the controlled charging of defibrillator capacitor(high voltage). The charging is controlled using PWM which controls the transformer switching using a MOSFET.

Hello everyone, I need the following but I am not sure if it is possible or not? I don’t have mechanical engineering background. Please advise me on feasibility of this project and any suggestion would be greatly appreciated. I am looking to design a horizontal cylindrical hollow turbine...

If I wanted a higher value for pitching moment due to a change in pitch rate, Mq, what are some design alterations I might make to an aircraft to incorporate this. I am guessing changes to the airfoil or maybe the tailplane but I am not sure what changes you would make to get a desired result.

Homework Statement I am designing a tripod which is for supporting a mass of 20kg at a height of 2m from the ground. The legs are cylindrical and hollow, dimensions are not set in stone, and would be made from an aluminium alloy. I do not want the legs to be bound at the bottom, they should...

Hi, I am planning on translating a vertical rack movement to a pinion rotary motion by a human footstep force. Any idea on how to obtain the rack linear velocity theoretically ?