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Consider the heat exchanger of Example 2.15 with the open-loop transfer function
(a) Design a lead compensator that yields PM ≥ 45° and the maximum possible closed-loop bandwidth. (b) Design a PI compensator that yields PM ≥ 45° and the maximum possible closed-loop bandwidth.
Example 2.15
A heat exchanger is shown in Fig. 2.35. Steam enters the chamber through the controllable valve at the top, and cooler steam leaves at the bottom. There is a constant flow of water through the pipe that winds through the middle of the chamber so that it picks up heat from the steam. Find the differential equations that describe the dynamics of the measured water outflow temperature as a function of the area As of the steam-inlet control valve when open. The sensor that measures the water outflow temperature, being downstream from the exit temperature in the pipe, lags the temperature by td seconds. Solution. The temperature of the water in the pipe will vary continuously along the pipe as the heat flows from the steam to the water. The temperature of the steam will also reduce in the chamber as it passes over the maze of pipes. An accurate thermal model of this process is therefore quite involved because the actual heat transfer from the steam to the water will be proportional to the local temperatures of each fluid. For many control applications it is not necessary to have great accuracy because the feedback will correct for a considerable amount of error in the model. Therefore, it makes sense to combine the spatially varying temperatures into single temperatures Ts and Tw for the outflow steam and water temperatures, respectively. We then assume that the heat transfer from steam to water is proportional to the difference in these temperatures, as given by Eq. (2.62). There is also a flow of heat into the chamber from the inlet steam that depends on the steam flow rate and its temperature according to Eq. (2.65),
Complete the printMonth(int numDays, int startDay) method below to print a calendar month. The parameters numDays and startDay show how many days are in the month, and which day of the week the month starts on
Cores on Computer Systems
It is expected that each student will creatively design and author a unique system based on individual choices that fit with the requirements listed in each task. Before you begin, read over the entire assignment and understand all the tasks. You are..
Using JAVA create a basic coin-flip guessing game. The game should prompt the player to choose heads or tails, flip a virtual coin and then display the results to the player.
Discuss the above statement and the role and responsibility of the Engineer Project Manager in advising the client through the overall strategic decision process in order to select the most appropriate procurement system for either a private or pu..
a.Discuss the computational environment for your tests, including the compiler, operating system, machine MHz and cycle times for appropriate instructions and whether pipelining affects your execution time.
What suggestions would you make to your colleague to fix the protocol? Assume the sequence numbers are properly sized.
Is the proposed technique a promising, practical approach which can be effectively implemented into an existing platform? Clearly explain your answer. What are the strengths and weaknesses (limitations) of this technique?
A. Write code that sums each row in the array and displays the results.
create 3 files date.h, date.cpp, date_main.cpp that will create a birth date and a graduation date in the form MM/DD/YYYY
The topic of your site can be any of your choosing. Pick something you have an active interest in, a hobby, a sport you play, a group or club you belong to, or any similar topic. Once you have selected your topic YOU MUST CONFIRM THIS WITH YOUR TU..
Design and implement a class called Bulb
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