Questions tagged [system]

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71 views

How do I get the transfer functions of each channel for a control system?

Consider acontrol system with the following transfer matrix: \$G(s)=\begin{pmatrix} G_{11}(s) & G_{12}(s)\\ 0&G_{22}(s) \end{pmatrix}\$ and suppose I want to get the transfer functions ...
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2answers
67 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 ...
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0answers
24 views

Oscillation of a system with 2 degrees of freedom

I have a question regarding a two degrees of freedom system ronsponse, when the U matrix and Q hat matrix are known. My problem is that I don't know how y1 hat and y2 hat are supposed to be calculated ...
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24 views

Discrete time linear time-invariant system Problem, thinking of the questions for days, plz help!

Sorry guys I know this maybe a easy question for you guys, but I have tried days to figure out what happen but I just don't know how to do for part b and c Here is the question: Consider a discrete ...
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0answers
55 views

Simple Stability and Feedback

I have a question, my book says that for the system in this picture: If the system has G(s)*H(s) with a module of 1 (0dB) and a phase of -180°, the system is in Simple Stability, so it is like in ...
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0answers
36 views

FAT32 file system performace

I have a beagle bone black board and I'm using starterware to implement a fat32 file system on SD card. I used an standard sd card(2 GB) in High Speed mode(clock = 50 MHz). First i tried to read/write ...
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1answer
23 views

How can an IAR ODE system be dynamic and LTI at the same time?

I'm currently studying a course of systems and signals. we talked about IAR ODE systems and their properties, and I have a question about something I don't quite get - how can an Initially at rest ODE ...
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1answer
46 views

Hi Pot / Dielectric Pass/Fail Recording

I just graduated last year with an Electrical Engineering degree. Currently pursuing a Masters's Degree, so I am fairly new to design. We have several HiPot Testers we use on the manufacturing line. ...
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2answers
138 views

Difference between pid controller and on-off controller?

I want to know difference between pid controller and on-off controller especially in regards to the operation of both? The following link gives difference between pid controller and on-off controller ...
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1answer
77 views

Effect of three PID gains on each other? [closed]

Do the three PID gains - Kp, Ki and Kd relate to each other or are they independent?
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1answer
47 views

On-off controller open loop or close loop?

Are all On-off controllers used for close loop control systems or can also be used for open loop control systems?
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14 views

How can we simulate an AC position control system in simulink?

The final feedback loop which I got is the following How can I implement this using Simulink?
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1answer
71 views

Working of control system of an elevator? [closed]

I am interested in studying/learning how control system of an elevator works.?How its specs/parameters are controlled or adjusted? Especially rise time and steady state error.?to provide comfortable ...
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1answer
45 views

In practice, what is the difference between the “nominal plant model” and the “plant model”?

I am reading a book on nonlinear control and disturbance rejection, and in many examples, they distinguish between the "plant model" \$G_p(s)\$ and the "nominal plant model" \$G_p(s)\$. They also add ...
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1answer
134 views

Are electrical properties measured using the International system of units (SI)?

What measurement system is used to measure electrical properties such as voltage, current, etc.? I understand the units are defined by SI (at least according to this article), but is that considered ...
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2answers
75 views

Time-invariant system question

I seem to struggle with the notations and concepts used in signals & systems. The book states, given that x2(t) = x1(t-T), x2(2t-5) is equal to x1(2t-5-T). This might be a dumb question, but ...
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3answers
123 views

Can we connect Earth , Neutral and Digital Ground together in electronics system?

In our project has Digital Ground , Earth and Neutral. As per the requirement Digital Ground and Earth ground tied through Bead inductor. Is it advisable to connect Neutral with Chassis and Digital ...
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1answer
51 views

Power system fault analysis

I have been stuck in this problem for identify the fault location. Can anyone show me where to start on this? I'm not familiar with reading the curves so please just give me any hint. Thank you
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0answers
30 views

Find impulse response for given difference equation

I have trouble understanding this. I am given this difference equation: $$y[n+2]-3y[n+1]+2[n] = 2u[n+1] -2u[n]$$ and I need to find the response for Kronecker delta function. I can do z transform ...
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1answer
58 views

General expression for non-unity gain feedback system's steady state error with disturbance

Thanks in advance for having a look. I finally have some time on my hands to go back through my controls systems text and I want to understand how the general expression is derived; rather than just ...
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1answer
35 views

Is the following system time-invariant or time-varying?

I was wondering if the following system is time-invariant or time-varying $$ y(t)=e^{-t}\int_{0}^{t}e^{\sigma}x(\sigma+1)d\sigma$$ I know that it's not causal, and I think it's time-varying because of ...
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1answer
131 views

Why a system is causal if the impulse response is zero for \$t<0\$?

I was reading a definition that Suppose \$h(t)\$ is the impulse response of any system \$Y\$, then the system is causal if and only if \$h(t)=0\$ for \$\forall t<0\$ I know what a causal ...
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1answer
39 views

Contradiction while using the convolution sum for a non-LTI system

In a recent quiz, we were given the following problem: The cascaded LTI systems \$\mathcal{T}_1\$ and \$\mathcal{T}_2\$ respectively have impulse responses \$h_1 \lbrack n \rbrack = \delta\lbrack n ...
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1answer
1k views

Lithium Titanate Battery Pack(LTO)

I saw arguably new and interesting lithium battery which is Lithium Titanate Battery(LTO). It has high discharge and charge current characteristic. Also, it has lower degradation graph when comparing ...
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1answer
74 views

Can a finite state machine represent every possible discrete deterministic system?

Consider the two following definitions: Discrete Deterministic System: a system where inputs and outputs can have only a finite number of values, and is deterministic; Finite State Machine: an ...
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0answers
38 views

Modelling Power Source in LT spice

I am working to model a simplified power system on LT spice, normally it is going to be voltage source with series resistance and series inductance, I was able to model the source with series ...
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1answer
80 views

How do I convert 1/3 to signed float 8 bit?

The formula is as follows: (-1)^[signed bit] * (1.[significant bit]) * (2^[excess bit -3]) or (-1)^[s] * (1.[f]) * (2^[x-3]) It is a question posed by my signals and systems instructor, hence the ...
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2answers
52 views

total transfer function of a LTI System with feedback

I have calculated the transfer function of such systems many times, but now i feel like I`m going around in circles. I have drawn a few help-signals to help me solve it, but they are dependent of one ...
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2answers
92 views

Nyquist Stability Criteria

Find the stability where: Find the stability: \$ G(s)= \frac{(s+3)(s+5)}{(s-2)(s-4)}; \$ \$ H(s)= 1; \$ I run this code in matlab: ...
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3answers
272 views

z-Transform Methods: Definition vs. Rectangular Rule or Tustin's Rule

The definition of the z-transform is defined as \$z = e^{sT}\$ where "s" is complex frequency for continuous-time systems and "T" is the sample period. Why are rules such as the forward rectangular ...
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1answer
122 views

How to determine u(t+1) - u(t-1) as even, odd or neither?

x(t) = u(t+1) - u(t-1) is given. How do we determine if it is an even or odd signal or neither? Do we plot it out or do we use the condition and convert it. and also, is it even or odd?
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1answer
189 views

PIC 10F200 MCLR PIN as Output

I need To use MCLR pin to make led blinking using this configuration but I conn't write the code for that
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2answers
103 views

Define LTI system from a single input output pair

I am currently studying signals and systems, and am learning about LTI systems right now. I know any LTI system whose impulse response is known can be completely defined through the use of the ...
2
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1answer
52 views

Hamiltonian-inspired energy function for power grid stability

I'm looking at this paper which proposes an energy function for a 3-bus power system example. I'm trying to replicate the results in the paper but am uncertain about the ...
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2answers
57 views

What is image and video signal ?

Signal is something that carries information. Usually, something is a pattern of variations of physical quantity that can be manipulated, stored, or transmitted by a physical processes. I am wondering ...
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1answer
57 views

Why the distribution network have 4 wires ( not neutral)?

In a real network the distribution lines were 3 lines (ABC). At one pole the lines became 4 lines which are ( ABBC) the phase B split to two lines . Could you please illustrate why they split them to ...
2
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2answers
117 views

Temperature Controlled System using LM 35

The fan should start to rotate when the temperature is above the threshold temperature and stop when the surrounding becomes cool. But the fan starts rotating as soon as the power supply is connected ...
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4answers
162 views

Can this example prove that bode plot is not correct?

Bode plot implies that for a linear system, if the input is a sinusoidal signal, output of the system will also be a sinusoidal signal with same frequency but different amplitude and phase. Knowing ...
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1answer
126 views

How are op-amp gain vs frequency response curves generated?

I have been wondering this for a while. When we look at the electrical characteristics of a device such as an opamp there is a gain versus frequency plot. I have couple of questions regarding ...
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1answer
67 views

Should I add Capacitance on Switched High Side

Following from this question, which remains open... if I've got a microcontroller switching the high-side power to a sub-system, using a circuit like this: ... should I add bulk and/or decoupling ...
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1answer
47 views

Isolating Power in Communicating 5V Sub-systems

I have been plagued by a sensor sub-system which, when connected to my base micro-controller platform, intermittently causes issues that I would categorically associate with power sequencing issues at ...
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1answer
153 views

Create repeated pole/zero in transfer function---Octave

Say I have such a transfer function with a repeated zero $$ \frac{s^2}{s+2} $$ How do I enter this in Octave as a transfer function? Perhaps this question applies to Matlab as well. If the zero was ...
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1answer
171 views

Solution for a set of non-linear equations

I am trying to solve the following equations for \$\delta\$ and \$K\$. I have tried Matlab function fsolve, but unsuccessfully. I also tried Wolfram Alpha and, ...
2
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1answer
162 views

What is or what “fast-ramping batteries” means at this context?

I'm trying to do a economics report of Battery Storage, but I'm from Brazil, so I have to find especific words used in portuguese to describe certain things in electrical setor. I find this term "fast-...
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1answer
73 views

Addition of step disturbance to a microgrid state space model

If we are having a microgrid model in the state space form as \$\dot{x} = Ax\$ where \$A\$ is complete system matrix.The matrix \$A\$ includes all the active power , reactive power, load currents, ...
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1answer
474 views

Does Solar powered ventilation systems for parked cars really work? [closed]

Do anyone have experience with the efficiency of air ventilation cooling systems for idle parked cars? I know some cars in the more expensive range (Mercs, and BMW's and some Toyota's) have a built ...
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2answers
148 views

Creating circuit diagrams from verbal descriptions. (Digital Logic)

I have these two descriptions of systems: And I want to answer them correctly (comes from a book with no solutions). For #9, isn't that just going to be an AND gate? We all know the truth table for ...
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1answer
80 views

Multicard System Grounding

I am building a system with multiple PCB cards. The whole system has a Chassis Ground; connected to a main Power Supply reference. All cards will be powered in reference to Chassis Ground. Each ...
0
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1answer
97 views

Looking for an AC current sensor for less than 10A measurements

We are building a voltage and current acquisition system using NI hardware. While voltage measurements are done directly using the NI IO Module, current measurements need a sensor. We have a 100A (...
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1answer
287 views

Desing Problem with Single Axis Solar Tracking System

I'm second year Electrical-Electronical Engineering student (It's Electrical Engineering basically but naming issues I guess) and my knowledge about circuits is limited to capacitors, inductors, ...