Questions
Categories
Tags
×
Welcome, guest
Login
Register
Lost Password?
hwmadeeasy
4
Menu
About
Questions
Answers
Reputations
Followers
Following
1
Find the total steady-state error due to a unit step input and a unit step disturbance in the system of Figure 4.
Solved
16 views
hwmadeeasy
Selected answer as best
2 days ago
Control systems engineering
steady state error calculation
1
Votes
1
Ans
Consider the signal x(t) with Fourier transform as shown 1) What is the minimum sampling rate for sampling this signal without causing aliasing? 2) Suppose the sampling rate is fs = 1.5 MHz . Plot the spectrum of the sampled signal. Give a precise plot. 3) Suppose the sampling rate is now fs = 4 MHz . Plot the spectrum of the sampled signal. Give a precise plot. Show how to recover the original continuous-time analog signal x(t). 4) Suppose we quantize the samples amplitudes (obtained with the sampling rate 4 MHz) to 128 levels. Find the resulting bit rate for the digital signal.
Solved
14 views
hwmadeeasy
Selected answer as best
2 days ago
Analog and digital communication systems
Sampling theorem solved problems
0
Votes
1
Ans
Problem 3: System type and steady state error Consider the system shown in Fig. 2. 00(s+2) s 5) 10 T Figure 2: A block diagram for Problem 3 (a) Find the system type. (b) Determine steady-state errors for a unit step input, u(t), a ramp input, tu(t), and a parabolic input, 1/2t2u(t). (c) Find the corresponding static error constants: K0, Ku, and K„.
21 views
hwmadeeasy
Asked question
2 days ago
Control systems engineering
steady state error calculation
0
Votes
0
Ans
Question 4: Steady-state error (8 marks). Consider the proportional control of a second order system subject to a torque disturbance D. The system parameters are./ = 1 kg • m2and b = 2 N • m/rad/sec. a. For a given gain Ic„ determine the system type, and the associated static position error constant ki„ static velocity error constant k„, and static acceleration error constant ka (when D(s)=0). b. Derive the transfer function between C(s) and D(s) (assuming that the reference input is zero or R(s) = 0). c. When the system has an unit-step input (r(t) = 1 or R(s) = !) and an unit-step disturbance torque D (d(t) = 1 or D(s) = !), the steady-state error of the system is e„ (D) = —0.2, determine the control gain K.
17 views
hwmadeeasy
Asked question
2 days ago
Control systems engineering
steady state error calculation
0
Votes
0
Ans
What is the fundamental period of the below signal? You need to find the fundamental frequency of e and e 5 separately. The fundamental period of [n] is the least common multiple of the se two numbers.
Solved
7 views
hwmadeeasy
Posted new comment
4 days ago
Signals and systems
Fundamental period calculation
1
Votes
1
Ans
A second-order control system has the closed-loop transfer function T(s)=Y(s)/R(s). The system specifications for a step input follow: (1) (15 pts) Percent overshoot P.O.≤5% (angle information is required) (2) (15 pts) Settling time Ts<4s (3) (15 pts) Peak time Tp<1s. Show the permissible area for the poles of T(s) corresponding to each of the desired response requirements. Use a 2% settling criterion to determine settling time.
Solved
13 views
hwmadeeasy
Selected answer as best
5 days ago
Control systems engineering
ECE 475 – Control System Analysis
0
Votes
1
Ans
3. (30) A feedback system is shown by the figure below a) (10 pts) Determine the feedback system transfer function Y(s)/R(s). b) (12 pts) Determine the steady-state error for a unit step when K=0.4 and Gp(s)=3. c) (8 pts) Select an appropriate value for Gp(s) so that the steady-state error is equal to zero for the unit step input.
Solved
18 views
hwmadeeasy
Selected answer as best
5 days ago
Control systems engineering
ECE 475 – Control System Analysis
0
Votes
1
Ans
4. (30+10 bonus) The block diagram for a wheelchair control system is shown below. Typical values for the time constants are:a) (10 pts) Determine the characteristic equation of the feedback system b) (10 pts) Generate the Routh array for the wheelchair control system c) (10 pts) Determine the limiting gain K=K1K2K3 for a stable system d) (10 bonus pts) When the gain K is set equal to half of the maximum limiting value, determine and explain whether the settling time (to within 2% of the final value of the system) is less than 4s.
Solved
18 views
hwmadeeasy
Selected answer as best
5 days ago
Control systems engineering
ECE 475 – Control System Analysis
0
Votes
1
Ans
2. (30) A feedback system with negative unity feedback has a loop transfer function 2( 8) ( ) ( ) ( ) ( 4) C s L s G s G s s s (a) (10 pts) Determine the closed-loop transfer function T(s)=Y(s)/R(s). (b) (10 pts) Using the figure on the right, determine the overshoot for a step input response. (c) (10 pts) Determine the steady-state error of the closed-loop system for a ramp input r(t)=t.
Solved
18 views
hwmadeeasy
Selected answer as best
5 days ago
Control systems engineering
ECE 475 – Control System Analysis
0
Votes
1
Ans
1. (30) A unity negative feedback control system has the loop transfer function: L(S)=Gc(s)G(s)= K/s(s+2k))(20 pts) Determine the closed-loop transfer function and percent overshoot due to a unit step input. (2) (5 pts) Determine the settling time (using a 2% settling criterion) due to a unit step input. (3) (5 pts) For what value of K is the settling time less than 1 second?
Solved
20 views
hwmadeeasy
Selected answer as best
5 days ago
Control systems engineering
ECE 475 – Control System Analysis
0
Votes
1
Ans
Exa) Calculate the output 𝒚𝒌of LTID system with the following input, 𝒙𝒌, and impulse response, 𝒉𝒌 𝑥𝑛=(0.4)^𝑛*𝑢[𝑛] ℎ𝑛=(0.8)^𝑛*𝑢[𝑛]
Solved
40 views
hwmadeeasy
Posted new comment
6 days ago
Signals and systems
discrete convolution
1
Votes
1
Ans
Determine the DTFT of the following signal 𝑥𝑛=4(1/2)^𝑛*𝑢(𝑛)
Solved
19 views
hwmadeeasy
Selected answer as best
6 days ago
Signals and systems
DTFT calculation
0
Votes
1
Ans
1. Find the most compact form of Fourier Transform X(f) of the time-domain signals x(t) below (both part (a) and (b)) using Fourier Integral. [Should show the result by the calculation of Integral !]
Solved
11 views
hwmadeeasy
Selected answer as best
October 12, 2021
Analog and digital communication systems
Fourier transform
0
Votes
1
Ans
2. (a) For the time domain signal x(t)= 4Cos(2π200)t +8 Sin2(2π200)t, Find All Complex (Exponential) Fourier Series Coefficients Cn . (5) (b) For the given signal x(t) in Part (a), Find X(f), then Sketch its Magnitude Spectrum in frequency domain.[Sketch both positive and negative frequencies too] (3) (c) Determine the required Minimum Bandwidth [in Hz] of the ideal LPF to pass the signal x(t) without losing any power. (2)
Solved
14 views
hwmadeeasy
Selected answer as best
October 12, 2021
Analog and digital communication systems
Fourier series coefficients
0
Votes
1
Ans
. This problem is on the AM-DSB modulation using single tone message m(t) using carrier c(t), where, m(t) = 2Cos(20πt) and C(t)= 10Cos(100πt). The Modulated Signal is generally written as S(t)=Ac[1+kam(t)] Cos2πfct. Hence Ac =10, and fc=50Hz from C(t) given above. (a) For Ka =0.1, decide the value of modulation index. (2) (b) Decide the maximum value of Ka to avoid envelope distortion. (2) (c) In case of (a), decide the maximum and minimum absolute values of the envelope of the signal S(t). (2) 4 (d) Among the total power of S(t), Decide the Portion of the Power (in %) due to Carrier frequency fc for ka=0.1 assuming 1Ω load. (4)
Solved
15 views
hwmadeeasy
Selected answer as best
October 12, 2021
Analog and digital communication systems
Amplitude modulation solved problems
0
Votes
1
Ans
1.LetF⃗=xˆz+yˆx+zˆyandevaluatetheintegral F⃗·d⃗lwhereCisthecirclex2+y2=a2in C the z = 0 plane. (Hint: Use Stokes’ theorem.) 2. A cylinder is filled with a uniform volume charge described by K, ρ≤a, ρv= 0, ρ>a, where K and a are given constants. In addition, a line charge having uniform density λ0 resides along the axis of the cylinder. What is the value of λ0 if E⃗ vanishes for all ρ > a?
Solved
28 views
hwmadeeasy
Edited question
October 10, 2021
Electromagnetics and waves
EEE3414
stokes theorem
0
Votes
1
Ans
Design an impulse response (h[n]) for the following system using above-mentioned commends in MATLAB:nynynyny [][][][]302.0236.0144.08.0−+−+−−=nxnxnxnx The input sequence (x[n]) is given as: []()2010sin− =nunnxπ with n = 0: 1:40. Find the outputs sequence (y[n]) using conv and filter functions. Please plot the impulse response (h[n]), the input sequence (x[n]) and the outputs sequence (y[n]) in one figure using subplot function.
Solved
64 views
hwmadeeasy
Selected answer as best
October 5, 2021
MATLAB simulations
matlab filter output
0
Votes
1
Ans
Matlab Assignment I. Generate 1200 samples of the AM signal x[n] with modulation index equal to 1. a. Use the sampling frequency fs = 20 kHz; carrier frequency fc = 1000 Hz; and a 50 Hz sine wave as your message signal. b. Generate the AM signal according to the equation x(t) = [A + m(t)]cos(ωct). Since, modulation index μ = 1/A, the DC amplitude is A = 1/ μ. c. Plot your generated AM time series. II. Rectify the signal x[n] (convert all negative samples to positive ones) and LPF the resulting signal (use the digital LPF design from Lab 3). Use 150 Hz as the bandwidth of the LPF and 63 as filter order. Plot the filtered output. This should look like the message sine wave after an initial transient. –
Solved
57 views
hwmadeeasy
Selected answer as best
October 4, 2021
MATLAB simulations
am modulation and demodulation in MATLAB
EE458L COMMUNICATION AND DSP LAB
Matlab simulation of AM wave
0
Votes
1
Ans
Problem 5.11 An infinitely long wire carrying a 25-A curent in the positive r-direction is placed along the r-axis in the vicinity of a 20-tum circular loop located in the r-y plane as shown in Fig. 5-37 (P5.11(a). If the magnetic field at the center of the loop is zero, what is the direction and magnde f tent owing n t loop? 1 im d-2m Figure P5.11: (a) Circular loop next to a linear current (Problem 5.11)
27 views
hwmadeeasy
Asked question
October 4, 2021
Electromagnetics and waves
Faradays law of induction
0
Votes
0
Ans
Find the information content of a message that consists of a digital word 12 digits long in which each digit may take on one of four possible levels. The probability of sending any of the four levels is assumed to be equal, and the level in any digit does not depend on the values taken on by previous digits. Please calculate it’s entropy?
Solved
1.04K views
hwmadeeasy
Selected answer as best
October 1, 2021
Analog and digital communication systems
entropy of the digital message calculation
0
Votes
1
Ans
Loading Comments...
Write a Comment...
Email (Required)
Name (Required)
Website