Questions tagged [system]

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2answers
40 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
116 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
47 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
27 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
40 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
34 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
77 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
38 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
569 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
73 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
36 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
78 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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1answer
39 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
87 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
139 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
95 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
136 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
63 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 ...
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1answer
50 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
54 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
56 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 ...
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0answers
35 views

Question about time invariant systems

So, as per projectrhea Going x[n] -> System -> Delay results in what I would expect. However, going ...
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2answers
108 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
158 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
90 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
64 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
105 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
137 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, ...
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1answer
132 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
437 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
112 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
63 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 ...
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1answer
96 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
274 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, ...
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1answer
104 views

understanding compensator's transfer function

Referring to the link http://www.analog.com/media/en/technical-documentation/data-sheets/AD2S90.pdf page no 9 states that RDC chip implements a type2 servo loop and the compensation is provided by the ...
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1answer
532 views

Can anyone please help me with this ETAP Project?

I'm trying to run the load flow study, but instead I'm getting this error. Error 101-01: [Bus 2] Bus base kV is out of 40% range from bus nominal kV. Error 722: [XFMR 1] 2W transformer secondary kV ...
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1answer
60 views

DC current injected into DR (Distributed Resources)

I was reading the IEEE 1547 standard, and under power quality topic there was Limitation of DC injection which stated "The DR and its interconnection system shall not inject dc current greater than 0....
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1answer
527 views

Are transient response, natural response, impulse response same thing? [closed]

According to wikipedia, they are equivalent. Is this correct?
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1answer
55 views

Form differential equation pair from discrete time system block diagram

I have a discrete time system block diagram. And my question is what is the output y(k) I managed to get what is V(k) $$V(k)=\frac{1}{2}*V(k-1) +U(k) $$ But now i can't form y(k) because ...
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2answers
391 views

Calculating total torque of stepper motor to lift and rotate some weight

I am going to design a system that would be control remotely. The system consist of stepper motor and solid cylinder rod of about 30 inches long and needs to lift about 0.5 lb/0.223 kg mean up to 90\$^...
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1answer
267 views

A question on the response of an RC circuit and pole of its transfer function

Below is an excerpt from an introductory level book about poles and zeros: The transfer function of the RC circuit system above for the output voltage is: H(s) = s/(s+10) The book claims that this ...
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1answer
59 views

How to determine a system is stable without knowing the input?

I was doing some exercises for an upcoming exam and ran into this. I am not sure how to find if the system is stable without knowing the actual input (since Routh array is the only method I'm familiar ...
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1answer
329 views

Is sinking mode and open drain the same concept in electronics?

I'm reading a few manuals about I2C , SPI where it says I2C ports are open drain,which I don't know what it is. I know about sinking mode and sourcing mode of ports in electronic circuits.
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2answers
248 views

Oscilloscope sensors (as a system) [closed]

Today in Introduction to Engineering class my teacher picked me to name what components are in the Oscilloscope, in terms of: Input Components, Display Components, Actuators, Sensors, and Controllers. ...
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1answer
224 views

IEEE 4 machine system: Need help in computing the bus admittance matrix

I need help in computing the bus admittance matrix for the following Kundur's 4 machine 2 area system: ...
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1answer
164 views

Basic Memory Sytem for ARM-based system

I am studying ARM Architecture and there is a slide which I didn't understand and can't find anywhere on the internet (Google, YouTube) - I've also looked for ARM homepage but they don't display any ...
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1answer
337 views

Selecting correct current limiting device [closed]

Requirement: During an external test 20W of power will be drawn from my supply circuitry for 1 minute. My mission is to implement a solution that limits the power draw to a level below 20W in under ...
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1answer
46 views

Impulse response of a LTI TD system

Why the impulse response of this system: \$y(n)=\sum_{|k|\leq3}^{}x(n-k)\$ is: \$h(n)=\sum_{|k|\leq3}^{}\delta(n-k)\$ and the impulse response of this one: \$y(n)=\sum_{k=0}^{+\infty}x(n-k)\$ is:...