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The objective of this problem is to use the Ziegler and Nichol approach to develop the PI controller equations that allow an embedded system to control a DC motor. The state variable is speed, which is measured using 16-bit input capture and has a measurement resolution of 1 rpm. The input capture device driver repeatedly updates a global variable, called Speed. This 16-bit unsigned variable has units of rpm and a range of 0 to 20000. The microcontroller uses pulse-width modulation to control power to the motor. The controller software writes to a global variable, called Duty, which ranges from 0 (0%) to 10000 (100%). The following plot shows an experimental measurement obtained when Duty is changed from 2500 to 5000. The desired speed is stored in the global variable, Desired, which has the same units as Speed. Design a fixed-point PI controller that takes Speed and Desired as inputs and calculates Duty as an output. From the response graph in Figure 13.30, estimate the L and R parameters of the Ziegler and Nichol method. How often should the controller be executed? Show just the equations (no software or hardware is required), calculating Duty as a function of Speed and Desired.
Figure 13.30
What is the synchronous speed of a 400-Hz eight-pole, single-phase motor? How many individual poles does it have?
Generate the Bode frequency response plots for your filter. Verify that your filter has the correct cutoff frequency - Find the pole locations and plot the pole locations in the s-plane.
Design a 4-bit decrementer using Half-adders and inverters as building blocks. The circuits impleents A-1=S. Draw the circuit diagram. Hint: consider addtion of the 2s complement of -1 =1111. Begin with a 4-bit adder circuit constructed with 1-bit..
One way to measure TC is a square wave generator having a frequency of about 1/10 of the inverse of the time constant. Assuming I apply a voltage of 1 volt across a capacitor of 1uF, and a resistor of 1k
create a circuit of three level-sensitive d latches connected in series the output of one is connected to the input
an electric field of 3.10times105 is desired between two parallel plates each of area 36.0 and separated by 0.620
In a balanced three-phase system, the abc phase sequence source is wye connected and Van=120
Using an ideal op amp, design an ideal integrator whose output will reach 5V in 200ms after a -0.1V dc input is connected.
How Automatic UPS system wiring circuit diagram for Home or Office works in both cases when the supply is available and when its not .
A finite state machine has one input, X, and one output, Z. The output becomes 1 and remains 1 thereafter when, starting from reset, at least two 1s and one 0 have occurred as inputs, regardless of the order in which they appeared.
Addition of two numbers in IEEE 754 format A) a=3f200000, b=be600000 B) a=3f200000, b=ff800000 C) a=01100000, b=80e00000
How to Wiring of the Distribution Board with RCD , Single Phase, (from Energy Meter to the main Distribution Board) Fuse Board Connection. ??
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