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.
64
questions
0
votes
2
answers
38
views
Euler's formula with different coefficients and constants
Hi and thank you in advance. I understand that one of Euler's formulas states:
cos(x) + isin(x) = e^ix
I know that if you were to have the same coefficient ...
- 3
0
votes
1
answer
31
views
State Space Model of a transfer function
where we will attempt to stabilize it using the proportional
control law u(t) = Ke(t).
My Question is, how do I obtain the open-loop transfer function from this dynamics system ? I assume that the ...
- 1
0
votes
0
answers
22
views
visualise state machines including timing dimension
On a communication link, Unit A and B are supposed to be handshaking either in fast mode or slow mode. They are waiting in a predefined mode for a predefined time, until the same mode is matched on ...
2
votes
2
answers
42
views
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 ...
- 121
0
votes
1
answer
62
views
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 ...
- 1
0
votes
1
answer
152
views
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 ...
- 5
0
votes
1
answer
130
views
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 ...
- 5
0
votes
0
answers
41
views
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 ...
- 1
0
votes
1
answer
731
views
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 ...
- 1
1
vote
0
answers
22
views
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 ...
- 11
-1
votes
2
answers
193
views
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 ...
- 11
0
votes
0
answers
71
views
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
- 23
0
votes
1
answer
28
views
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 ...
- 103
0
votes
0
answers
120
views
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 ...
- 101
0
votes
1
answer
79
views
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 ...
- 101
0
votes
1
answer
62
views
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 ...
- 115
0
votes
0
answers
131
views
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, ...
- 101
0
votes
2
answers
42
views
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 ...
user14407
2
votes
3
answers
660
views
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 ...
- 135
1
vote
0
answers
21
views
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 ...
2
votes
0
answers
37
views
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 ...
- 21
0
votes
2
answers
105
views
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 ...
- 1
0
votes
0
answers
32
views
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 ...
- 1
1
vote
0
answers
131
views
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 ...
0
votes
0
answers
32
views
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 ...
- 1
1
vote
0
answers
121
views
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 ...
- 11
0
votes
1
answer
2k
views
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 ...
- 225
0
votes
1
answer
77
views
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 ...
- 225
1
vote
1
answer
56
views
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 ...
- 225
-1
votes
1
answer
179
views
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 ...
- 225
-1
votes
1
answer
71
views
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 ...
- 111
1
vote
1
answer
55
views
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:
...
- 225
1
vote
0
answers
86
views
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 ...
- 225
0
votes
0
answers
62
views
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 ...
- 225
0
votes
0
answers
72
views
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 ...
0
votes
1
answer
451
views
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 ...
- 103
-1
votes
2
answers
52
views
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 ...
- 169
-2
votes
1
answer
48
views
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 ...
- 99
1
vote
1
answer
29
views
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 ...
- 228
3
votes
2
answers
237
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/...
- 268
2
votes
0
answers
139
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 ...
- 21
3
votes
0
answers
149
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 ...
- 139
8
votes
2
answers
455
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 ...
- 461
4
votes
1
answer
141
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 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?
$$\...
- 41
24
votes
11
answers
8k
views
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, ...
- 241
2
votes
1
answer
95
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 ...
- 121
2
votes
0
answers
36
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 ...
- 21
3
votes
1
answer
4k
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 ...
- 31
3
votes
2
answers
3k
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 ...
- 87
1
vote
0
answers
232
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? ...
- 213