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The block diagram for an elevator controller for a two-floor elevator follows. The inputs FB1 and FB2 are 1 when someone in the elevator presses the first or second floor buttons, respectively. The inputs CALL1 and CALL2 are 1 when someone on the first or second floor presses the elevator call button. The inputs FS1 and FS2 are 1 when the elevator is at the first or second floor landing. The output UP turns on the motor to raise the elevator car. The output DOWN turns on the motor to lower the elevator. If neither UP nor DOWN is 1, then the elevator will not move. R1 and R2 reset the latches (described below); and when DO goes to 1, the elevator door opens. After the door opens and remains open for a reasonable length of time (as determined by the door controller mechanism), the door controller mechanism closes the door and sets DC = 1. Assume that all input signals are properly synchronized with the system clock. Please apply the following guidelines to your design. If you were to realize an elevator controller that responded to all of the inputs FB1, FB2, CALL1, CALL2, FS1, FS2, and DC, you would need to implement logic equations with nine or more variables (seven inputs plus at least two state variables). However, if you combine the signals FBi and CALLi into a signal Ni (i = 1 or 2) that indicates that the elevator is needed on the specified floor, you can reduce the number of inputs into the control circuit. In addition, if the signal Ni is stored so that a single pulse on FBi or CALLi will set Ni to 1 until the control circuit clears it, then the control circuit will be simplified further. Using a D flipflop and a minimum number of added gates, design a storage circuit that will have an output 1 when either input (FBi or CALLi) becomes 1 and will stay 1 until reset with a signal Ri. (a) Using the signals N1 and N2 that indicate that the elevator is needed on the first or second floor (to deliver or pick up passengers or both), derive a state graph for the elevator controller. (Only four states are needed.) (b) Realize the storage circuits for N1 and N2 as describe in the design specification.
A lot of size N= 30 contains three nonconforming units. What is the probability that a sample of five units selected at random contains exactly one nonconforming unit what is the probability that it contains one or more non conformances
In the presentation, the presenter, Mr. Rob Tucker discussed three types of disturbance mitigation responses or measures. List the three mitigation types and give a short definition of each of the mitigation type.
A 200 hp, 2300V, three phase, 60Hz, wound rotor induction motor has a blocked rotor voltage of 104V. The shaftspeed and slip speed, when operating at rated load are 1775 r/min and 25 r/min, respectively.
A south-facing collector at latitude 40%u25E6 is tipped up at an angle equal to its latitude. Compute the following insolations for January 1st at solar noon: a. The direct beam insolation normal to the sun's rays.
An infinitely long shell with a cylinder shape extends between r = 1m and r =3m has a uniform charge density ρ. Apply gauss's law to find D in all regions.
calculate the convolution (x1[x]*x2[k]) for the following pairs of sequences: a-) x1[k]=u[k+3]-u[k-2] and x2[k]=u[k+5]-u[k-4] b-) x1[k]=0.5^k u[k] and x2[k]=cos Pi*k u[-k]
a) Starting from an initial count of 0000, list the countingsequence after each shift until the count returns to 0000b) Beginning with an initial count of 00..0, what is the length ofthe count sequence of an n-bit Johnson counter
A continuous-time signal x(t)=cos(2πt) is sampled every T seconds, resulting in a discrete-time signal x[n] = x(nT) . Determine whether the sampled signal is periodic and if the signal is periodic, determine the number of samples in the fundamenta..
An ADSL signal uses 250 channels, each of 4 kHz bandwidth. Assume the maximum signaling rate to be 1 symbol/Hz. QAM is used within each channel with up to 64 point constellations. What is the bit rate/channel
An LVDT is used in an accelerometer to measure seismic-mass displacement. The LVDT and signal-conditioning output is 0.31mV/mm with +/-2cm maximum core displacement.
a low pass first order instrument has a time constant of 20ms. Find frequency in hz of the input at which the output is 93% of dc output. Find phase angle.
A pinecone falls straight down from a pine tree growing on a 20 degree slope. The pinecone hits the ground with a speed of 10 m/s. What are the components of the pinecone's impact velocity: a. parallel and b. perpendicular to the ground
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