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Questions tagged [systems-engineering]

Systems Engineering is a multidisciplinary field that combines lifecycle planning and risk analysis with core features of other engineering disciplines. It includes understanding physical systems, organizational planning, computer modeling, and information management. It is also commonly used to ...

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What are the necessary qualitative criteria for the existence of limit cycles

The literature on the existence of limit cycles is replete with complex and abstract mathematical analysis. Or for specific systems of specific structure, specific mathematical criteria that determine ...
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39 views

Finding constraint condition + Kinetic and Potential Energy

I am trying to find the Kinetic and Potential energy of the slider-crank mechanism shown in the fig. I am not sure what I have calculated is correct or not. I would be glad if somebody could confirm ...
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Eigen-Modes for a homogenous, non-conservative mechanical system

$$ M\,\ddot{y}+D\,\dot{y}+K\,y=0\\ y=\begin{bmatrix} y_1&y_2&\cdots&y_f \end{bmatrix}^\top\\ M=M^\top>0,\quad D=D^\top,\quad K=K^\top\geq0 $$ Equations show a homogeneous non-...
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Can a quadrotor track a perfectly horizontal and straight trajectory?

We know that the only control action provided by a quadrotor system is through the propellers. Now, assume that I want to track $x(t), y(t), z(t) = (t,0,0)$. Can we ever develop a controller which ...
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2answers
50 views

Frequency Response of a Discrete System

Let's say that I have the following continuous system: $$G(s)= \frac{2}{1+s}$$ I could convert it to a discrete system using for example the Tustin approximation https://en.wikipedia.org/wiki/...
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52 views

How do I calculate the velocity of the piston?

I have a system with a motor connected to the trapezoidal lead screw. The lead screw is connected to the tube which is connected to the piston. The piston has to pump 1000cc oil against a pressure of ...
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7 views

How do I design an experiment to measure torque in series DC motor which uses leadscrew to transmit power?

I am designing a variable buoyancy system in which trapezoidal lead screw is used to transmit power from motor to piston using a connecting tube.The piston is used to pump oil in and out of the ...
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58 views

How many Technical Rescue: Collapse Units are there in the US? [closed]

In a story about today's Miami bridge collapse, I saw this photo: In the upper left, there is a white box truck which seems to say "MIAMI DADE FIRE RESCUE / TECHNICAL RESCUE / COLLAPSE UNIT," even ...
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1answer
87 views

System Dynamics Modeling

I am trying to model this system but am having difficulties in setting up the equations of motion. This is a simplified model of a motorcycle suspension system, where P is the ground in the image ...
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1answer
98 views

How to design the right input to obtain a desired output for a linear system?

If I have a state-space model, so that the A, B, C and D matrices are known, how can I design the right input u, so that y is a custom signal, for example, a sine wave with constant amplitude? $\dot{...
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Is there a Practical Approach to Find the Right Settings for a Kalman Filter

System & Expectation The system is a climate control (indoors), so the values are pretty stable but if e.g. a window was opened the values decline/rise to a new level. Reality I have a few ...
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From an engineering point of view what are the downsides of a too accurate model?

I was wondering, from an engineering point of view, for what reasons can too much accuracy in modeling be detrimental? From a scientific point of view it seems like it's almost always a benefit, ...
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21 views

What methods exist to structurally redesign an existing machine?

In engineering I often encounter the situation where a machine/product needs to be redesigned to reduce cost, or improve the efficiency. For example: I am currently in the process of redesigning a ...
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1answer
82 views

How do I hook these components together to get my desired functionality?

I have a big button http://store.2xlnetworks.com/thebigbutton/ and a display counter Microframe Model 265 https://www.microframecorp.com/d0265-6-digit-rugged-computer-controlled-display . I want the ...
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0answers
29 views

How do I perform RM scheduling?

The question says, "Perform RM scheduling for the following task set: T1=(2, 0.5, 4), T2=(3, 1, 10), T3=(5, 1, 10) and T4=(7, 0.45, 15)". Here the standard notation (Period, execution time, relative ...
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1answer
503 views

What are the Singular Values of a dynamic system and how are they calculated in the *sigma* function in Matlab?

According to Matlab documentation: sigma plots the singular values of the frequency response of a dynamic system. bode creates a Bode plot of the frequency response of a dynamic system. I am ...
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2answers
598 views

Square wave transfer function?

I made a mathematical model (transfer function) of a rlc circuit. I simulated it in matlab simulink with step input and square wave input and observed the result. I can also calculate this system with ...
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226 views

How many controllers of output or state are available? [closed]

Im in daily basis see a lot of controller. Sliding mode PID. Fuzzy, adapttive. Controller based on lyapunov etc. But how many are they that are actually in use in industry and when do we use them? ...
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1answer
78 views

Control System Question - spectra and their degrees of excitation

What is the difference between impulse, step and sum of sinusoids signals in terms of their spectra and their degrees of excitation ?
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1answer
42 views

What is the name of my feedback procedure in control system that I am using?

I have created a self balancing robot. It uses PID control to control its pitch angle and gets the feedback from gyroscope and accelerometer. But I have not used any sensor to feedback the ...
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1answer
144 views

How do I convert this mechanical system into a mechanical network?

How do I convert this into a mechanical network? like a circuit network. my attempted work is this: is this schematic correct?
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3answers
94 views

Harmonic systems, system linearity

I have a bucket full of water with a hole in bottom, lying on a spring like in the picture I have attached. Is this system considered to be linear or not?
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1answer
639 views

Mechanical System Transfer Function - Systems Modelling

First of all my english writing is not so good, but I can read it without problems. I've got this mechanical system and I need to get some transfer functions. We made all the force diagrams and got ...
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Sketching an engineering system in healthcare

I am about to do a project about engineering systems in a Systems Engineering course. I need to sketch an engineering system in which clinical decision support systems are being used to diagnose ...
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1answer
1k views

MIMO (multi input - multi output) system decoupling method

A MIMO system with 2 input and 2 output decoupling method to a SISO system is described in many articles and books. How about m*n size transfer functions systems? How can we generalize the method for ...
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What is micro-electromechanical systems (MEMS)?

I know definition but how would you explain to complete layik ( as me ) what is MEMS and how it is used. Examples: Silicon nanopore membranes (SNM) have been prototyped from silicon substrates by ...
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628 views

Fan Sensors (Tachometer vs Locked Rotor)

With regard to Fan Sensors, there are two very common methods for detecting whether the fan is doing what it's supposed to or not. Locked Rotor- Detects when the fan is working, or when it has ...
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1answer
987 views

What kind of signal is the signum function? A power signal or an energy signal?

I'm studying "signals and systems". We can indentify two kinds of signals: power signal and energy signal. The definitions are: Energy of a time-continous signal $$ E_x = \int_{-\infty}^{+\infty}{|x(...
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2answers
683 views

Is there a term for a circular dependency in system design and engineering

Is there a term used in systems engineering that describes a situation in which the design of one subsystem (call it "A") affects the the requirements for another subsystem (call it "B") while at the ...
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1answer
369 views

Simulation of First Order System (Matlab & Simulink)

Yesterday, I tried to find constants $k_1$ and $k_2$ for the following system: $$\frac{\mathrm d RH}{\mathrm dt}=k_1+k_2(RH_{ext}-RH).$$ Now, I have some first computations for $k_1$ and $k_2$ and ...
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1answer
144 views

Parameter Estimation for First Order System

I would like to get a simple estimation of the parameters for a humidity chamber system. The humidity chamber has one constant inflow ($k_1$) and and outflow which depends on the humidity of a ...
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5answers
2k views

Is systems engineer an IT profession or an interdisciplinary field of engineering?

The term Systems Engineer has always interested me as it generally involves many different fields of engineering. Systems Engineer - Interdisciplinary The definition I'm familiar with is usually ...