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Welding processes have been automated over the past decades. Weld quality features, such as final metallurgy and joint mechanics, typically are not measurable online for control. Therefore, some indirect way of controlling the weld quality is necessary. A comprehensive approach to in-process control of welding includes both geometric features of the bead (such as the cross-sectional features of width, depth, and height) and thermal characteristics (such as the heat affected zone width and cooling rate). The weld bead depth, which is the key geometric attribute of a major class of welds, is very difficult to measure directly, but a method to estimate the depth using temperature measurement has been developed [26]. A model of the weld control system is shown in Figure AP9.3.
(a) Determine the phase margin and gain margin for the system when K = 1. (b) Repeat part (a) when K = 1.5. (c) Determine the bandwidth of the system for K = 1 and K = 1.5 by using the Nichols chart. (d) Predict the settling time (with a 2% criterion) of a step response for K = 1 and K = 1.5.
describe some benchmarking performance metrics for the airline
the number of items rejected daily by a manufacturer because of defects was recorded for the past 30 days. the results
a certain colege has 490 of the 584 freshman return as sophomores. does this college have a right to brag that it has
The customers arriving between 0 and 1 have to wait until the store opens. Suppose X is the total times that these customers have to wait. Calculate Var(x).
Find the indicated percentage for the normally distributed variable. Round your answer to two decimal places, if necessary.
Sample standard deviation s=4.8. what is a point estimate off the difference between mean annual consumption in Webster City and the national mean?
The athletic director claims that the atendance is the same as last year. What is the test value needed to evaluate the claim?
Solve for the following items: The point on the x-axis that is equidistant (equal distance)from (10,4) and (6,2).
a local unemployment office keeps track of the number of new claims filed each day. based on data collected it
Based on p=.60, probability that a randomly selected homeowners will say no to newspaper subscription.
A study was conducted with 35 people that resulted in a mean of 22.1 minutes with a standard deviation of 1.9 minutes. Using a .05 significance level, test the claim that the mean amount of time relief will be felt is less than 25 minutes.
A survey of 800 women shoppers found that 17% of them shop on impulse. What is the 98% confidence interval for the true proportion of women shoppers who shop on impulse?
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