ECET 365 Week 4 Complete DeVry

Description

ECET 365 Week 4 Complete DeVry

ECET 365 Week 4 Power Systems DeVry

ECET 365 Week 4 Discussions

WEEK 4: ALTERNATE BATTERY TYPES

What are the advantages and disadvantages of using NICAD, NIMH, lithium, or sealed lead-acid rechargeable batteries?

WEEK 4: SUBSYSTEM POWER REQUIREMENTS

Compare the power requirements for the subsystems of your project to the power requirements for the motors.

ECET 365 Week 4 HOMEWORK

Page 242, Problem 4.10. Page 586, Problem 11.5c,g. Page 589, D11.20, D11.21

Don’t forget to submit your assignment.

ECET 365 Week 4 COURSE PROJECT (DUE IN WEEK 8)

Review the Course Project Overview under the Introduction & Resources area for an overall description of the Course Project, grading rubric, and deliverables.

The Lab is focused on tasks required to develop a power supply system for the project.

ECET 365 Week 4 Lab

Lab 4: Converting Requirements to a Work Schedule

Objectives

1. Test the main power supply of the Smart Car or robotic system.
2. Test the subsystem power supplies and determine if a separate battery system is required for the subsystems.

Parts List

1. Robotic Car Kit
2. Freescale Tower Kit with S12G128 CPU board
3. PC with IDE software (e.g. CodeWarrior Development Studio V5.1)
4. Alternative Robotics Kit or other kit if applicable

Introduction

1. A project system contains several subsystems that require power. The Robotic Car Kit, for example, has a visual sensor subsystem, a steering subsystem, a CPU board subsystem, and a motor control subsystem. It may be possible to run the subsystems from one main power supply (e.g. a 9V or 12V rechargeable battery). Warning: DO NOT POWER DC MOTORS USING THE POWER FROM THE DRAGON BOARD OR POWER BOARD. USE A SEPARATE POWER SUPPLY.
2. The Robotic Car uses 4 AA batteries. The power supply on the Primary elevator board accepts a 5 V input to produce 3.3V for the Tower. Four new alkaline AA batteries have a starting voltage of 1.61 X 4 = 6.44 V.  This is a bit too much for the power supply. The power supply was tested at this voltage for a short time, but the current drain was 100 ma.  The current drain was much less, as the voltage input approaches 5 V.A rechargeable NiMH battery has a peak voltage of 1.35 V. This gives a total voltage of 1.35 x 4 = 5.4V. This is much better. If you don’t see the wisdom of rechargeable batteries, you could drain the non-rechargeable batteries using a resistor (greater than 10 ohms) until the voltage is 1.35 V.
3. It is also possible that the subsystems might require a separate battery system to avoid interference from the large motor pulses powered by the main power system.
4. This lab will evaluate the power provided to the subsystems to determine if a separate battery is needed.
5. Similar procedures would be used for a robotics project with subsystems.

Deliverables

Answer all questions in Week 4 Lab Cover Sheet here (Links to an external site.)Links to an external site..

Submit your Week 4 Lab Assignment.

You can also download the cover sheet for Week 4 Lab in the Files section of the Course Menu.

Required Software

CodeWarrior Development Studio for S12(x) V5.1

Access the software at http://www.nxp.com/ (Links to an external site.)Links to an external site..

Lab Steps

STEP 1: Procedures

1. Robotic Car Subsystems
   1. The interacting subsystems are the visual sensor subsystem, the steering subsystem, the motor subsystem, and the CPU board subsystem. We need to ensure that the motor subsystem does not affect the other systems.
   2. Set the assembled car on blocks so that the motor wheels can move freely. Consider that the front wheels must have room to move.
   3. Load the Robotic Car program into the CPU board. Ensure that the visual sensor inputs and outputs are connected to the CPU board.  Also, ensure that the H-Bridge inputs are correctly connected.
   4. In a previous lab, we have tested the steering of the front wheels with an index card that has a 1-inch-wide stripe down the center of the card. This time, we will test the system with the wheels powered.
   5. Test the system with the subsystems powered, but the motor power to the H-bridge disconnected. Single-pole single-throw switches are recommended, but you can just disconnect the appropriate wires.  Troubleshoot the system if it does not operate satisfactorily. Once the visual system works correctly, proceed to the next step.Note: These procedure steps can be performed whether the Tower system has been mounted on the Robotic Car chassis or not. It is recommended that the Tower be mounted on the chassis. Otherwise, the system is a confusing pile of wires. Nevertheless, it can be tested in such a manner. See the Robotic Construction Notes in the Files section of the Course Menu.
   6. Again, test the steering system, but turn the motor power on. The H-bridge is sending large pulses to the motor. If the subsystems are connected to the same battery as the motor power subsystem, the motor pulses may interfere with the steering subsystems. The Robotic steering works by stopping the motor on one side when the sensor on the other side detects the white background of the foam board track.
   7. If there is no interference, proceed to step 8.  If there is interference such that the steering is not working correctly, use the oscilloscope to observe the power going to the subsystems. First, try the power going to the CPU board. The power supply on the Tower primary elevator provides the 3.3V to the protoboard and CPU board. Check the 3.3V bus for interference.It may be that a few more capacitors on the subsystem power lines may reduce the noise enough for the steering to work correctly. Note that you can add filter capacitors (tens of microfarads) before and after the voltage regulators. Consider the filter shown in the Robotic Construction Notes (see the Files section of the Course Menu).If not, you may consider a separate battery for the subsystems.  The batteries are heavier than the capacitors.  If a separate battery does not work, go back to step 5 and verify that the system works without the motor running.  If running the motor with separate batteries for motor and subsystem, check for wiring and connection errors.  Again, the oscilloscope is very useful for tracking noise pulses.  When you have a correctly working system, proceed to step 8.
   8. If the steering works correctly with the motor running, and you haven’t done so already, mount the tower system on the Smart Car chassis. See the Robotic Construction Notes document in the Files section of the Course Menu.
   9. Observations
      1. For each subsystem, determine the actual current draw. If a sensitive ammeter is not available, use a small (0.1 or 1 ohm) resistor in series with the power lead. Measure the voltage across the resistor and calculate the current using Ohm’s Law (I = V/R).
         1. Video sensor  _____
         2. Servo              _____
         3. CPU board     _____
         4. Motor             _____
      2. Sketch the subsystem power voltages displayed by the oscilloscope. If noise was discovered and reduced, sketch the display before and after the noise was reduced.
      3. Calculate the expected operating time for the system. Ensure that the motor power operating lifetime will not exceed the CPU board operating lifetime

Motor System Lifetime _____
CPU Board Lifetime     _____

1. Let the system run until either the CPU board or the motor stops running. If the CPU board stops before the motor does, increase the capacity of the CPU board power supply.

ECET 365 Week 4 Quiz

Instructions

Here is some information about your Quiz.

• This quiz covers CO 5 and Chapters 4, 11.
• This quiz is worth 20 total points, which include the following questions:
  • 3 multiple-choice questions at 5 points each;
  • 1 short-answer question at 5 points each; and
• You have 60 minutes to finish the quiz.
• Here is a reminder to SAVE frequently, because when the time limit is reached, you will automatically be exited from the exam.
• This quiz contains one page.

By submitting this work, I am attesting that it abides by the Student Honor Code.

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ECET 365 Week 4 Complete DeVry

ACCT 553 DeVry, BIAM 500 DeVry, CIS 500 STR, CIS 558 STR, ENG 105 GCU, FIN 390 DeVry, FIN 504 GCU, HCA 545 GCU, HCA 699 GCU, HLT 306 GCU, HLT 362 GCU, HLT 555 GCU, HLT 610 GCU, HLT 665 GCU, HOSP 594 DeVry, HRM 600 DeVry, MAT 144 GCU, MGMT 600, MGT 599 STR, MGT 655 GCU, MKT 373 GCU, PSY 362 GCU, PSY 565 GCU, PSY 575 GCU, PSY 665 GCU, SOC 102 GCU, SOC 320 GCU, SOC 372 GCU, SOC 412 GCU, NSG 6440 SU, HIM 515 GCU, NSG 4029 SU, HIM 615 GCU, NSG 3029 SU, NSG 4055 SU, NSG 6630 SU, NSG 6005 SU, CRMJ 310, PSY 510 GCU, CRMJ 300 Devry, CRMJ 425, SPD 200 GCU, HLT 490 GCU ,ECH 340 GCU , ECH 440 GCU , ECH 355 GCU ,ECH 350 GCU ,LDR 461 GCU ,ECH 425 GCU ,REL 212 STR ,SCI 115 STR ,CIS 505 STR ,JUS 652 GCU, MGT 640 GCU, CIS 527 STR, SOC 436 GCU,ACC 502 GCU, FIN 504 GCU , MATH 260 DeVry ,ETHC 445 DeVry ,ECET 220 DeVry , CARD 405 DeVry, NETW 203 DeVry, NETW 205 DeVry, ECET 365 DeVry