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The system of Figure has the following functions: move a work piece into position, clamp it, start the drill, move it down to drill a hole.
The temperature of water in a tank is controlled by a two-position controller. When the heater is off the temperature drops at 2 K per minute.
A floating controller with a rate gain of 6%/min and has a deadband. Plot the controller output for an input given by Figure. The setpoint is 60 gal/min.
For a proportional controller, the controlled variable is a process temperature with a range of 50 to and a setpoint of 73.5°C.
Develop the physical ladder diagram for a motor with the following: NO start button, NC stop button, thermal overload limit switch.
Construct a state variable description of the process shown in Figure. The timer output (TU) is initially low when its input (TM) is low.
Design a state variable solution to the system of Figure such as in below problem. Assume another binary input, R, that is 1 when the system is running.
Develop a flowchart to describe the event sequence for the running phase of the bottle-filling system of below example.
Insertion of a coin and pushing of buttons provides a paper cup with coffee that can be black, with sugar, with cream, or with both.
The stepper has per step. Design a system that accepts a 4- to 20-mA input to produce the 100- to 200-rpm speed. Use a V/F converter.
Define input variables, output variables, and the sequence of serial/parallel events Figure.
Suppose the worm gear of Figure 1 has a potentiometer attached as shown in Figure 2, so that the stem position is converted to resistance.
How long does it take to move the stem over the full range of travel? What is the minimum flow rate?
A control valve operates from a 3- to 15-psi control signal. To have a 40-gal/min flow rate, express the signal input.
The shaft is driven through a 10:1 reducer from a stepping motor of per step.
The level of water in a tank is to be controlled at 20 m, and the output flow rate is nominally through a control valve, as shown in Figure.
An equal percentage control valve has a rangeability of 32. If the maximum flow rate is , find the flow at 2/3 and 4/5 open settings.
Design a system by which a control signal of 4 to 20 mA is converted into a force of 200 to 1000 N.
The SCR in Figure requires a 4-V trigger. Design a system by which the gears are shifted when a CdS photocell resistance drops below 2.5 kO.
A hydraulic system uses pistons of diameter 2 cm and 40 cm. What force on the small piston will raise a 500-kg mass?
A feed hopper requires 30 lb of force to open. Find the pneumatic actuator area to provide this force from a 9-psi input signal.
A stepping motor has 130 steps per revolution. Find the digital input rate that produces 10.5 rev/s.
What is Programmatic Advertising? What is RTB?
Describe the difference between sentimentalism and intuitionism. Does one theory seem more plausible than the other? Explain.
This rope is strung over a massless, resistance-free pulley. The blocks are released from rest. Find the tension in the rope and the acceleration of the blocks.