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 describe a position in information technology which involves managing multiple technology stacks and overseeing computer networks.

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Guides on developing procedures and checklists with human factors in mind

I work at a science facility where the software and physical configuration of a huge collection of instruments is modified to conduct some experimental research, and then must be returned to precisely ...
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Product Line Engineering Requirements

I am looking into product line engineering for a project. Previously I've used mostly requirements system engineering for projects. From looking at product line engineering, it appears that it has ...
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Design of the parameter of a transfer function so that output can reduce to zero

Here is a transfer function. $$G_2(s) = \frac{Y(s)}{F(s)} = \frac{M_1s^2+K_1}{(99s^2+30000+K_1)(M_1s^2+K_1)-K_1^2} = \frac{M_1s^2+K_1}{99M_1s^4+(99K_1+30000M_1+K_1M_1)s^2+30000K_1}$$ The output to the ...
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Forced vibration single degree of freedom system

so for the Single Degree of freedom system, I obtained the equation in blue, where I think the equation below in black is missing the ‘m*a’ from F=ma? So I see that there is one ‘m*a’, but is that ...
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Full state feedback with integral action - Matlab script

I made this Matlab script to implement a dynamical system with full state feedback and integral action. Maybe I'm wrong in implementing the integral action because the system diverges. First I ...
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Dynamical system problem

I have this dynamical system: A = [ -0.313 56.7 0 -0.0139 -0.426 0 0 56.7 0]; B = [0.232 0.0203 0 ]; C = [0 0 1]; D = 0; I'm ...
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Modelling a Simple Translational System

I posted this on stack exchange physics, sadly no one has answered so I thought I'd try my luck here. I am trying to model the following translational mechanical system in I/O form, however I am ...
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Control Systems: 3rd order system project [duplicate]

I'm in need of help finding a third-order or higher system in which I can derive a transfer function. We have a class project in which we need to find a real-life example of the system that equates to ...
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Do the functions or the system transform the data in a functional model?

With functional model diagrams like IDEF0 are the transformations of input to output performed by the system as a whole or by the transformation itself? For example, which of these two describes the ...
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Tranfer function of non-self regulating process

This system is non-self regulating process with mathematical model : dh/dt = (fi-fo)/C where fi = flow input, fo = flow output, C = tank capacity or volume tank. I want make tranfer function of this ...
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Mathematical model of an hydraulic jack

How to find a mathematical model of this hydraulic jack system? I'm confused about the part when the piston extender, check valve 1 opens and check valve 2 closes, then liquid from the bottom tank ...
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Transfer Function for Electro-Mechanical System

Can anyone please lead me in the right direction as to how to solve for the transfer function given this motor schematic
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Time Constant For Step Response First Order System

I ran several experiments where I attached my phone to a motor and collected the angular velocity at different step inputs( different voltage values). My question is, is it possible for the motors to ...
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Incorporating a dichotomous failure model for sustainment analysis

Disclaimer: I am a data scientist, not an engineer. I have been tasked with forecasting failures of a given part and seeing how it affects inventory. Suppose I have historical yearly failure data for ...
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How to design the interfaces between the components of a schematic block diagram?

From the diagram below, the interface between the "Intert Gas Pressurization Subsystem" and the "Oxidizer Storage Subsystem" is labelled as "Inert Gas Pressurant". This ...
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Need new pressure switch mechanism for a 3 phase compressor using a 220V AC Drive

I've bought a vintage Quincy 216 air compressor. Actually there are duel Quincy 216's - each has a separate 3 phase motor. One motor is 1.5 HP and the other motor is 2 HP. The compressors share a ...
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Unstable System. Error Trying to model the Red Bull Stratosphere Free Fall

I tried to model a problem months ago and still I can't solve, I don't want forget this problem so I would like to share what I tried and if you know what is happening with my graph. This is the ...
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Definition of BIBO stability of a nonlinear system

I am studying an electric motor whose state-space equations are nonlinear. I am trying to control the system through a closed loop and I would like to verify the BIBO stability. For linear systems, ...
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How does feedback implementation look like in a real word closed- loop process?

I'm looking for a generic term/process that explains how we can make a closed- loop control system. The typical elements of a closed loop systems are controller, actuator, plant and sensors. If you ...
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Transformers and systems with gears have similar computation when having quantities refer to different parts. What is the general concept?

In rotational mechanical systems, there is a common ratio used when transferring quantities to different shafts. $$ \frac{N_D}{N_S} $$ Let's generalize number of teeth into number of a physical ...
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Evaluating a developed system by application of a case study

I am looking to the evaluation of a developed system to provide validity to my research. The system consists of manufacturing processes, procedures etc. and the plan is to implement the system at an ...
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2 votes
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How are circular dependencies dealt with inside MBSE?

How are circular dependencies (best) managed inside of MBSE environments? Let's say I have two properties that are linked to each other / they are linked to properties that affect each other. How is ...
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How to calculate frequency response of the system? and find missing values [duplicate]

I can convert the H(s) into the frequency response which is: 𝐻(𝑗𝜔) = 𝜇(𝑗𝜔/(1+ 𝑗𝜔𝜏)) and the output in the steady state is: 𝑦(𝑡) = |𝐻(𝑗2)|sin(2𝑡 + ⟨𝐻(𝑗2)) The phase: ⟨𝐻(𝑗2), has to ...
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DC Motor stops working for a couple if time at cold start every time

We have a DC motor that is connected to the track with couplers. Every day at cold start (when it hasn't run for sometime), when we start the motor while moving up (Z-axis) the motor stops (brakes ...
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Reference book for hydraulic systems design

I'm looking for a good reference book on the topic of fluid dynamics/hydraulics systems engineering. I'd like a reference for simlpe/estimate calculations on things like major losses (pipes), minor ...
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Best way to go about "HiPot" testing setup

What is the best way to set up a dielectric strength test? I am planning on using two threaded copper rods for adjustable movement that will receive the voltage. In between the two rods will be the ...
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Calculating reliability of a parallel redundant system

I'm trying to calculate the reliability of a system that has proven to be a bit more complicated than I thought. Here is the block diagram for the system: Every single component in this diagram is a ...
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1 answer
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What are the drawbacks of inceasing the bandwidth of the system?

I have a doubt concerning the closed loop frequency responce of a control system. Suppose I have the following situation: in which is plotted the frequency response of a system with different ...
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Problem finding value of the gain such that the closed loop is stable

I have the following transfer function: $G(s)=\frac{-s^3 +s}{s^4+3s^3+2s^2}$ and this is a transfer function of a plant with two poles in the origin. So I want to desing a controller with two poles ...
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1 vote
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Problem with RHP zero in transfer function

I have a transfer function with a RHP zero in $s=+1$, and I am trying to show in Matlab thath this limitation is present. In particular, initially I had a MIMO system, which I decoupled and then I ...
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Doubt on bandwidth of a control system

Consider this image of a loop shaping design: here which is the bandwidth of the system? I have a doubt because until now I have considered as bandwidth to the system the one of the complementary ...
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Nyquist stability criterion for positive feedback

it is known that the stability of a system with negative feedback may be analized through the Nyquist stability criterion, which is based on observing the number of turns around the point (-1;0) in ...
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Doubt on zero pole cancellation

I am looking at a control system which has an unstable pole in the process. The transfer functions of process and controller are the following: ...
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Why a zero too close to the imaginary axis gives bad berformances?

I am studying control systems, and I have found that if I consider I control scheme where I filter the reference , if the zero of the pre-filter is too close to the imaginary axis, we have a ...
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effect of coupling in MIMO systems

I have a MIMO system with a 2x2 transfer matrix, for example consider: $\begin{pmatrix} \frac{2}{s+1} & \frac{1}{(s+1)(s+2)}\\ \frac{1}{(s+1)(s+2)}&\frac{2}{s+2} \end{pmatrix}$ I would ...
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Help with Engineering Mathematics, Struggling to determine coefficients using methods detailed in this research paper

I am struggling with a curve fitting calculation below. the part I am stuck with is arguably the simplest part, which is determining the coefficients $\\K_3$ and $\\K_4$. It seems like it should be ...
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How to model projectile motion using dynamical system matrices

I'm trying to figure out how to model projectile motion which can be defined using a simple [quadratic] equation which defines projectile parabola: $$y = y_0 + v_{0y}t - \dfrac{1}{2} gt^2$$ I came ...
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-1 votes
2 answers
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What is the engineering way to describe a factory / manufacturing plant system in a formel and mathematical way

I am interested in mathematically describing as well as formalising a manufacturing plant so that other people in the engineering field understand how the system works. I am not from the engineering ...
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In what way the object-oriented methodology model an information system? [closed]

Answer briefly how the object-oriented methodology transforms an information system. I really do not know how to answer that question. I know what is an information system ("System capable of ...
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2 votes
1 answer
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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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3 votes
2 answers
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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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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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3 votes
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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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8 votes
2 answers
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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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4 votes
1 answer
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How to design the right input to obtain a desired output for a linear system?

If I have a state-space model, so that matrices $A$, $B$, $C$ and $D$ are known, how can I design the right input $u$, so that $y$ is a desired signal, say, a sine wave with constant amplitude? $$\...
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24 votes
11 answers
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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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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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2 votes
0 answers
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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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3 votes
1 answer
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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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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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