All Questions

Filter by
Sorted by
Tagged with
0
votes
0answers
8 views

How can i transmeat video feed along with control signals in my wireless CCTV system?

I am try to build wireless cctv camera system. in here, i want to use only one camera. and camera give live feed and camera must be rotatable.suppose, i intend to use android application that ...
0
votes
0answers
11 views

Calculation of reference vehicle speed using wheel speed sensors and longitudinal acceleration

I am curious why the speedometer in most passenger cars almost always uses the highest wheel speed, even if the rest of the wheels are stationary. Is this intended to be a safety feature of some sort? ...
0
votes
0answers
18 views

Want to modify my chainsaw, what things are most likely to break (or what things should I stick with first?) [on hold]

I'm very new to saws/2-strokes but have learned a ton and overhauled a few saws now, dissembled my new climbing saw, am wanting to eventually have all my saws performing as powerfully as possible (w/o ...
0
votes
0answers
8 views

Laminar flow hood/air straightener

I was looking at laminar flow filters to aid in my mycology work I'm doing. Most filters use an aluminum extrusion with fins. I figured the options out there are pretty expensive for what you get and ...
0
votes
0answers
2 views

Where to find spectral details like wavelength for hyperspectral GeoTIFF files?

I agree that GeoTIFF format doesn't store wavelength information. But for hyperspectral images spectral wavelength is important to know. I got to know that the GeoTiff files store these information in ...
0
votes
3answers
30 views

Steam cycle for a boiler / radiator system vs Rankine cycle

Everything I've read on the Rankine cycle indicates that the feedwater pump is necessary for the cycle to work. However the steam cycle used in traditional household boiler / radiator systems seems to ...
0
votes
1answer
24 views

Do you need to be a chartered engineer to submit structural calculations to building control in the UK?

I’m a graduate structural engineer with 4 years experience, working in the UK. A family friend is planning on doing a house extension which will require some structural calculations for steel beams. ...
0
votes
1answer
20 views

Where is the axis of bending for a box lifted by a crane?

A box is being lifted by a crane. Sometimes the box will be completely full, and sometimes it will only be partially full (indicated by the gray shaded regions). The question is, where is the axis of ...
0
votes
1answer
27 views

Does screed increase the slab tension capacity?

Does a screed applied over the slab increase the slab tension capacity? Somehow it's counter intuitive because adding weight on the slab should tension it, but do the slab and the screed behave as a ...
-1
votes
0answers
12 views

Heat transfer Chemical Engineering

could anybody please help me with these two questions, i have been stuck on them for a very long time Many thanks]2
0
votes
1answer
22 views

What pressure drop is needed to get 15-20 gpm?

Scenario: There's a 1 inch, rubber hose, with fluid flowing in it at 75 psi. The density of the fluid changes (but I'll just be calculating with a specific known density, 8.35). So, I want to get the ...
0
votes
0answers
12 views

How to write the equilibrium stress equations for a hollow, rectangular beam?

I have a system consisting of a hollow, rectangular cantilever beam (pictured below). I'd like to write the equilibrium stress equations à la the Cauchy Stress notation. How do I account for the ...
0
votes
1answer
15 views

ANSYS Design Modeller more significant figures

I need to just get the volume from ANSYS Design Modeller but I would like a higher number of significant figures rather than just 5 (See picture). How do I do this? Thank you for your help!
0
votes
1answer
44 views

Looking to design a cantilever support to hold up an 80kg projector

I need to make a support (preferably metal) for a projector to be fixed on the wall. The projector size is: Width: 0.7m Length: 1.1m Weight: 80kg If anyone knows how i can solve this please let me ...
0
votes
1answer
57 views

Impact of having flexible electrical hose buried into the reinforced concrete slab

Given: a reinforced concrete two-way slab at about 160 mm (supported in 4 edges) the electricians buried the flexible electrical hose into the slab (red lines in the image below) and then covered the ...
0
votes
1answer
27 views

Can a horizontal foundation safeguard against earthquakes?

I have not taken any course in civil engineering. What I was taught was that a broad base would prevent something from toppling. So it makes me wondering instead of nailing the foundation of a ...
0
votes
0answers
15 views

Heating hot air within a 2 inch tube

Background So I am working on a project to where I am trying to heat up air within a 2 inch tube, with high air flow. I am using 2 inch tri clamp stainless steel tubes where I basically have a fan ...
0
votes
0answers
15 views

Auto-tuning PI controller with maximum sensitivity

I am trying to design an auto-tuning controller in matlab with the help of the paper from Astrom and Hagglund: Design of PI Controllers based on Non-Convex Optimization* (1998). They use the maximum ...
1
vote
0answers
29 views

Can I use a single stator coil to actuate/rotate two rotors inside and outside of the stator

I want to design a motor system where a single stator coil is responsible for two rotors of neodymium magnets on its outside and inside, will this work, and what are the downsides I should be ...
0
votes
0answers
16 views

CAD software recommendation for Aerospace [on hold]

I am undergraduate in Aerospace engineering and I want to learn CAD so can you list some good CAD software (free and paid) helpful for airplane designing?
-1
votes
0answers
14 views

How to simulate the penetration of a liquid between two contact surfaces using Comsol Multiphysics?

I am facing a problem to simulate the penetration of a liquid inside a hyperelastic structure. I have used a predefined model of a water balloon based on FSI simulation I found on Comsol's website, ...
0
votes
1answer
43 views

Identify plant transfer function to design PID controller

I am trying to find the transfer function of a plant that contains numerous equipment including a heater, several tanks, pumps, membranes etc. I need to design 2 PID controllers: the first one to ...
0
votes
0answers
23 views

water pump problems

I am presently facing a problem in water plant . In a tank there are four pump placed at equal distance named A B C D .in this arrangement A and D positioned at near corner of the tank . I started ...
0
votes
1answer
51 views

Can an enclosure be water tight and NOT air tight?

I am trying to create an air tight cable exit system for a fuel tank. Basically, an instrument is to placed in the tank, with its cable exiting through the top of the tank. This exit point needs to ...
0
votes
1answer
22 views

off-scale torque measured - what is my torque arm?

I have assembled a benchtop torque measurement stand for evaluating electric motor and controller efficiency. The motor is 49kV , 5kW brushless outrunner. Input power reading is taken from motor ...
0
votes
0answers
13 views

Where to purchase a high pressure electrochemical cell [on hold]

I want to purchase a high pressure cell that's corrosive resistant and can perform impedance spectroscopy tests. Is there any company out there that can make this cell? Specs: volume: 10ml pressure: ...
0
votes
1answer
43 views

Wire heating and heat transfer in a cylindrical pattern

I have a series of copper coils with ¼” cooling plates between each coil. The cooling plates will be manufactured from aluminum and cooled using copper tubing. There are seven in series, and a plate ...
0
votes
1answer
26 views

How to calculate airflow in m3/min on a gas turbine outlet?

I'm currently trying to figure out the airflow of a gas turbine in m3/min. I thought that i would be able to measure the windspeed over a known cross section on the intakte of the turbine and then ...
2
votes
4answers
62 views

When reaming a hole to fit a bearing, can I get an underfit by icing the workpiece?

It's my first time working with bearings, but this is a necessary part of my robotic arm project. I have some $10 bearings that are 24mm OD. I want to fit these tightly in a hole, ideally getting a ...
3
votes
1answer
31 views

What's the most practical way to measure angular velocity for small rotations?

I'm looking to measure the angular velocity of an arm as it moves. It seems to be a difficult thing to research, since the term 'angular velocity/frequency' is usually reserved for other areas of ...
2
votes
0answers
32 views

How do old wind turbine towers pickup magnetism overtime?

I was conducting some robotics tests on a old wind turbine today, and noticed strong magnetic fields around the steel tower. This magnetic field does not exist on other modern wind turbines at the ...
0
votes
0answers
8 views

Custom User Models in Aspen Plus

I'm trying to simulate a purifier in Aspen Plus in a cryogenic system. This purifier is just meant to change the pressure of the outlet stream based on the inlet flow and pressure (we are using the ...
0
votes
2answers
29 views

Would a cross correlation between vibrations in the X and Y directions help determine vibrations in the Z direction?

I have a 2D vibration sensor that can only measure in the X and Y directions, and it is mounted on top of a motor that is fixed into place, as shown in a rough sketch below. Would I be able to work ...
0
votes
0answers
15 views

How to calculate the temperature rise in a PCB with 24 DIMMs?

I've designed a motherboard sized PCB (.8sqft) with 24 DDR2 DIMM modules running on it. I'm having trouble figuring out how to calculate the temperature rise. My calcs come out to 128F temp rise over ...
0
votes
0answers
10 views

Facing problem in simulating Combustion in ANSYS IC Engine Fluent

I am working on the project of Modelling of Combustion Process of Internal Combustion Diesel Engine Using Ansys ICE Fluent, in Which I am facing problem to obtain the Desired Result. My Objective: ...
0
votes
0answers
21 views

How to detect milk spillage or milk boil?

In my country we generally boil milk before we drink. Often the milk heats up and spills from the pot. I want to detect milk boil before it spills off.I am thinking of a thermal camera solution that ...
1
vote
2answers
100 views

What does it mean that the mass of a propellant tank is at premium?

I am reading the rocket propulsion elements book by sutton and I came across the following statement: "Because the propellant tank has to fly. its mass is at a premium and the tank material is ...
0
votes
0answers
8 views

How does Milkor MGL Granade Launcher's trigger and cylinder mechanism work

I want to know how does Milkor MGL's trigger and cylinder work. In particular, I am interested in how exactly the trigger action switches the cylinder among the cartridge chambers. As far as i know, ...
0
votes
2answers
50 views

Designing a 1-button system allowing for a differentiated control of 2 different valves?

I'm in the processes of building something which requires I'll be able to control the independent opening/closure of two (small, ~10mm in diameter) different adjacent holes using one finger, and I'm ...
0
votes
0answers
15 views

How does a digital controller's sampling period dictate the system's actuation requirements?

When selecting an actuator for a controls application - e.g. choosing a servo motor for a self-balancing robot - I understand that it's important for the actuators to have fast enough dynamics that ...
0
votes
0answers
15 views

How to calculate compressive yield strength of a composite material or a fgm?

I know the volume fractions of HAP and titanium in a functionally graded material. How can I find yield strength of it?
0
votes
0answers
17 views

Robotics Performance Requirements - Autonomous Vehicle [closed]

Say we are developing an autonomous vehicle. Our vehicle must detect and respond to stop signs. How do we define performance requirements for this safety critical task in regards to correctness?
0
votes
3answers
53 views

Fastening a Nut on threaded rod from the middle

Does there exist any type of Nut, that can be screwed on a threaded rod that can slipped in without having to go to the ends of the threaded rod? I can sort of imagine a Nut that was a ...
1
vote
2answers
29 views

How do maglev trains turn given that they seem to have more than two bogies per car?

All of the images of maglev trains that I've seen seem to have a continuous drive mechanism along the entire length of each car: I assume this must be articulated some how, or the train wouldn't be ...
1
vote
0answers
13 views

How to minimize temperature increase caused by compression of a cryogenic liquid in a multistage high pressure turbopump?

The cryogenic fuel I'm using is methane at 100 K and 300,000 Pa. Based on my calculations, after compression, the pressure is 55 MPa and using the ideal gas equation the temperature is approx. 800 K. ...
0
votes
0answers
37 views

Why does DSG have low torque capacity?

Why does DSG have low torque capacity? They are very simillar to manuals but manual transmissions can handle greater torque. Why js that? What determines the torque capacity of transmission?
1
vote
0answers
19 views

Generating random samples for some concrete structural characteristics [on hold]

I want to test a program that performs FRP concrete structural strengthening calculations according to a particular design code. As inputs for these calculation, there is existing concrete cross ...
0
votes
0answers
27 views

Software to find the common volume of intersecting cylinders?

I would like to find the common volume between cylinders for different radii and at different angles (3-D). Can I do this using ANSYS design modeller? Or what can I use (preferably a free download for ...
0
votes
0answers
17 views

Simple Thermal Analysis for sealed Aluminum box with 3.7 Watts of heat generation internally

I am looking for a starting back of the envelope calculation to determine if an aluminum box with just free convection can dissipate 3.7W of internal heat generation or if I need to think about adding ...
3
votes
0answers
32 views

What kind of professional(s) build/design factories? [closed]

I have a small self-built food processing unit (500sqft) but it is very labor-intensive. I want to make a larger unit (45,000sqft) with 100x more output using factory machinery (automation, conveyor ...

15 30 50 per page