Systems Definition and 1000 Threads

Hello I am currently an aerospace engineer at university and was beginning to wonder whether it was the best idea to be an AE engineer. The curriculum involves courses on propulsion systems and the different methods as well as other courses about the actual structure of aircraft and...

I have a question that i been trying to solve which seam simple but been having trouble. Today I thought about rotation matrix and how the following problem would be solved. Initial Coordinate system (x,y,z) a rotation is desired about x let's say α=30 degrees so that a new coordinate...

Does anyone know which type of orbit is most likely to result in habitable worlds in a binary star system -- a planet orbiting one of the two stars, or orbiting both of the stars, or are they both very likely/unlikely? Wikipedia quotes a paper that simulated binary stars and found that 50-60%...

I've stumbled upon a system of equations that involves trig functions... 100cos(θ) + 200cos(ω) = 250 100sin(θ) + 200sin(ω) = 0 How do you go about solving a system like this? It's nonlinear, so linear algebra won't work...

hello, does anyone know if lagging a turbo and exhaust system would cause failure of the turbo. my thought is that on the lagged turbos the heat can not disperse causing early failure due to expansion of the casing, bearings and shafts. could it also effect the oil viscosity ? any thoughts...

I'm having problem with task (a) in this problem The question My attempt The solution Why don't I get the same after I take the partial fraction using my calculator? And where does this R(s)=1/s^2 come from

Homework Statement A tubular column supports a mass as shown in the diagram below. A strain gauge is placed transversely on the outside diameter of the bar to act as a load measuring device. The column has an outside diameter of 50 mm and an inside diameter of 40 mm. The modulus of...

I am familiar with the idea of pump head and system pressure losses, pump curves etc. However, a friend was asking about the relationship between static pressure, force and acceleration. For example, if the pump supplies a certain pressure (P) at a given flow rate, is there not a force...

Hi! I have a question concerning solving a system of linear equations. I know that the pseudoinverse matrix by using SVD is useful for this, but haven't gotten the pieces together yet. Let's assume I have this system of linear equations with each equation having one 3-component vector (V1)...

Does probability necessitate an underlying deterministic foundation in order to offer a degree of prediction? Thank you in advance!

Heyo, I'm not sure if this is the proper place to post this question, but as far as I could tell it's the closest place to appropriately do so. Anyways, here's the question; Are all isolated, deterministic systems inherently recursive? Keep in mind by isolated, I mean completely closed...

I came up with this question while studying for an upcoming exam. I had a design problem, my solution gave me a gain of about 5500 with a PI compensator. Does having that high of a gain screw with my system? It gives me the desired results in MATLAB, but are there any drawbacks to doing that?

Linking "Lower" Voltage and "Higher" Voltage systems? I'm an undergraduate in EE (entering sophomore level) and I have been wondering about how a low voltage control system is connected to a relatively higher-in-voltage system. (An example would be how a thermostat turns off and on a heater or...

I was wondering how people ran computers before operating system. Since there is no OS to load our program, run it and then show the result, was it all done manually? What was the procedure to load your program into the memory? I have heard something called dumb terminals. Was that used...

Homework Statement When converting from one coordinate system to another, you cannot just use standard conversion formulas, but have to compensate using a special factor term. What is the name of that special compensation factor? I'm having no luck with finding the name.

Hello folks, I am having hard time to decide which class to take in my senior year. I have two choices: Embedded Systems with primary focus on FPGA and VHDL and another class is Control Systems design. I like both of them, but the problem is that they are offered almost at the same time, so I...

I would like to ask if anybody knows something about the methods of solving infinite linear autonomous systems of first-order differential (or possibly difference) equations. There is a well-known method for solving finite-dimensional systems based on the computation of eigenvalues of the...

Hi friends, I have two different questions. 1. I search information about development new automation systems, not regular development that develop a new algorithm or new control method or search after the dynamics of the system but development without research and without to take out new...

Heyo, Finally taking my first senior level course in Mechanical Engineering - Dynamic Systems and Controls. I find it incredibly interesting and was hoping someone could suggest an easy to medium difficulty project I could do on my own. This is for my own edification. The book that my class...

This is an image of Classical Dynamics of Particles & Systems, chapter 1 In deriving the equations for the rotation of a coordinate system I understand the equations 1.2a & 1.2b b, but why is the projection of x2 on the x'1 equal to ab +bc and why is the vector de equal to the vector Of? I...

Hi all, Can linear algebra used to deal with non linear systems? and why linear algebra is 'linear'? :( -Devanand T

Homework Statement Hi, this is not a homework question per se, but something I'm wondering. Let C be a circulant n x n matrix, let x, b, be vectors such that C x = b. We would like to find a solution x. One way is to use the DFT: According to section 5, In Linear Equations, in the wikipedia...

I am reading 'Classical Dynamics: A Contemporary Approach' by J. Jose, and I am confused about a step in the author's development of potential energy for a system of many particles. He begins by writing down a term equivalent to the total change in kinetic energy of the system: \sum_i...

I'm confused regarding the phase diagrams of binary systems. Let's suppose we mix 2 liquids, A and B at a given pressure P that won't change during the whole experiment. I raise the temperature until I observe that some of the mix of liquids vaporizes. What boggles me is that it seems I can...

Hi all, I'm in a bit of a dilemma. I have an opportunity to take Signals and Systems over the summer. However, I have not taken Differential Equations yet. A course on Electric Circuits is a prerequisite for this class and I ended up taking that last semester without any DE knowledge LOL...

There is an article I am reading, http://authors.library.caltech.edu/38643/1/PhysRevLett.110.174301.pdf I don't quite understand a lot of where this guy is coming from. I do not have much background in Lagrangian and Hamiltonian formulations, but it is vital that I can formulate some sort...

My book describes a linear system with "m equations in n unknowns." Maybe this is a subtle detail but this confuses me. Shouldn't it be the other way around, "n unknowns in m equations?"

Hi! I want to write a code in Matlab for the Backward Euler Method for 2x2 systems, using the fixed point iteration to find the yn+1. y1n+1=y1n+h*f(tn+1,y1n+1,y2n+1) (1) y2n+1=y2n+h*g(tn+1,y1n+1,y2n+1) (2) Could you tell how I use the fixed point iteration?? At (1) the fixed point iteration...

Previously, before getting into relativity, I've always thought of a 'reference frame' of basically an "observer carrying a coordinate system" - where I thought of an observer as anything which could record information of positions and velocities of particles etc. Now, however, I'm reading a...

Homework Statement A boy finds £2.10 in 20p, 10p and 2p coins. If there are 17 coins in all how many of each can he have? Homework Equations Row ops. The Attempt at a Solution I'm trying to come up with a few equations with which I can create a matrix. x1 = amount of 20p. x2 =...

1. When taking an object and the Earth as a system, its change in potential energy is given by a. m*g*change in height b. (-m)g*change in height c. either a or b d. there is not potential energy due to gravity 3. I think it is c because the sign of energy does not matter?

What would be the prerequisites for an operating systems course or for a compiler course? I am well-versed in C programming and digital circuit design but have very little knowledge of computer architecture. Would I be recommended to go through a text on comp arch before starting a text on...

Hey everyone I am having problems with a pulley system. I think that my motor is too fast now I am not sure if that can affect the pulley system and actually result in it not rotating the belt on the pulley.

In the mathematics of Calculus, a basic requirement is that the system or function should be continuous. Until the discovery that matter is discontinuous, applying Calculus in Physics was reasonable. But why is it still applied almost everywhere in physics ? Won't such applications produce...

Homework Statement Water is retained in a 1.25 rectangular section channel by a sluice gate. This gate can pivot about its base, the depth of the water is 1.5m and the density of the water is 1000kgm^-3. You must find the tension in the horizontal retaining cable attached to the top of the...

Hi, if a load is given in MVA and I work out the Real and reactive power, is the equivalent complex impedance per phase the values of real and reactive power divided by three in the following form: Z (per phase) = Real power/3 + j Reactive power/3 Im not sure how to work out whether the...

Homework Statement Choose an even number in the interval [100,199] and compute its orbit under the proper divisor function. Homework Equations Proper Divisor Function = σ(n) = Sum of all divisors of n, excluding n The Attempt at a Solution I am unsure what it means by "compute the...

I understand this type of field can involve many different specializations, and people who work in this field often work as part of a team to focus on very specific parts of a weapon/defense system, etc. With that said, I am not necessarily looking to work in this field, but rather I want the...

Imagine a blob of continuous charge in vacuum, the fluid elements will exert a force on each other and thus radiate away energy to infinity and thus be forever lost, does this mean that charged continuums will always lose all of its energy?

I've drawn the following FBD (using D'alembert prinicple) [The N in my drawing is the F_A stated in the question] ---------------- Assuming my FBD has nothing wrong, am I right to say that I am free to choose my torque equation about ANY POINT? somehow my solutions vary depending on my point...

So I've recently came into a few dirt cheap piezo actuators. Was considering turning them into a x-y-z positioning stage then maybe a micromill or something. My one issue is I'm unsure of what is best to use for feedback control in the sub-micrometer range. Only thing I know that accurate is...

I've been asked to approximate a dollar amount for heating and cooling an occupied tenant space in a commercial office building. We've looked into installing a temporary gauge on each unit to give us a good approximation, but the cost to gauge up all the electrical and gas was beyond the scope...

I'm currently a physics major with a year left, and deciding whether to switch into mathematical physics, mathematics or applied mathematics. I'm definitely switching into one of them, as I can meet the requirements for either in my last year and all of them align better with my interests...

Ordinary photovoltaics work by depleting phosphorus un boron doped silicon in eatch other and creating a permenant electric field, which then separates any pair of hole and electron induced to the conducting band by a incoming photon, creating an aditional elekctric potential difference, which...

my knowledge of time-space is limited, so my question might be poorly/wrongly constructed/verbalized: Do we have two sets of co-ordinate systems when space-time is bent (by say, mass)? in one system the circle becomes, say, an ellipsoid while in other it remains a circle? in one...

Hi everyone! Design of electrical systems for buildings is the field I want to engage in the future. I have already basic concepts learned about this. But I want to improve myself in this field. I am looking for a reliable and organized reference. Please help me choose the book/reference I...

I have attached an image of a ''brick-wall'' band pass filter. Can someone please help me find the expression of frequency response for it? Homework Statement Homework Equations The Attempt at a Solution

How would you interpretate this image about LTI systems and convolution?

Homework Statement Oscillation in mechanical structures can often be described by the function: y(t)=(e^(-t/τ))*sin(ωt+θ) Where t is time , ω is oscillation frequency in radians per unit time. The oscillations have a period of 2*π/ω and their amplitudes decay in time at a rate...

Hi all, I'm taking a systems modeling class and as such a portion of the class consists of a differential equations review, mostly centered around Laplace transforms and some functions I've never had to deal with before so I was hoping for a bit of help if you'd all be so obliged! I have quite a...