RME40002: Mechatronics Systems Design Design Portfolio Guidelines - Engineering Assignment Help

Assignment Task:

Task:

An articulated robotic arm is mounted on a linear shuttle system, which expands the working range and allows for a smaller, lower-cost robot to be used. (Image from KUKA Robotics) In this design portfolio, you will aim to design and simulate such an automated linear shuttle system for a lightweight robotic arm. Design Requirements The linear shuttle system you design should satisfy the following requirements:

1) Carry a robotic arm vertically that weighs 5 kg and has its mounting base of surface area of 30 cm x 30 cm. (Note: you do not need to design the robotic arm)

2) Has an axial moving range of 2 meters.

3) Travel speed should be up to 0.5 m/s.

4) Driven by one brushed rotary DC motor only.

5) Positioning accuracy should be within ±5 mm. 

Design Tasks

1) Literature review Complete a survey on how the linear shuttle system is employed in industry. The survey should expand to other applications apart from being the carriage of robotic arms. Compare the pros and cons of the systems you find.

2) Mechanisms design Firstly, you should select appropriate drive mechanism that converts the motor’s rotational motion to linear paths. In terms of accuracy, ball-screw driven rail achieves the greatest accuracy, followed by rack-and-pinion systems and then belt-driven units. You may also use your own creative ideas. Design the component parts appropriately to fulfill the requirements such as gear trains, belt, rails, shaft support blocks, and so on. Note that the shuttle system must be designed and sized appropriately for the speed, length of travel, load, and accuracy. Create parts, assembly and drawings of your designed linear shuttle system using SolidWorks. Your assembly should also include the selected DC motor as required in the next design task, but no robotic arm.

3) Selection of DC motor Select a commercial brushed rotary DC motor. Note that the specifications of DC motor importantly change the achievable speed, load capacity, and accuracy of the linear shuttle system and thus should be carefully considered. You may also need to modify the mechanism design or re-select the DC motor in a recursive way to meet the design requirements ultimately. Commercial brushed rotary DC motors could be selected from the following recommended suppliers, but not limited to: https://www.maxongroup.net.au/ https://www.faulhaber.com/en/home/ You should justify your selection and attach a detailed datasheet of your selected DC motor in the design portfolio report.

4) System modelling Support your selected DC motor could be represented by a simplified model as follows: ????????????????? + ???????? = ???????? · ???????? where J and k denote the model parameters, ???????? denotes the angular speed of motor output shaft (unit: Revolutions Per Minute – abbreviated RPM) and u the input voltage (unit: Voltage). Use the information on the datasheet of your selected DC motor to determine the values of J and k in the above model. Justify your answer. (Hint: the parameter k indicates the static RPM value in response to a nominal input voltage; while the parameter J indicates the

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