Oct 182018

Evaluation criteria

List of Criteria

Evaluation criteria should be informed by the list of assets which is already in place. One key characteristic of the list of criteria is the requirement should be written so that the evaluation results in either “yes” or “no”. Criteria should include buildability, reliability, and maintainability in case anything goes awry. Design concepts should also be evaluated based on buildability, technical feasibility, and functional feasibility. At this point in the design process, our team can write informatively on the technical and functional feasibility, and we can speculate on the buildability of design concepts. Furthermore, the list of evaluation criteria should be developed from customer requirements and cover all aspects of the device. The table containing the criterion should also be divided by demands and wishes when appropriate. When constructing a list of evaluation criteria, it is helpful to look at the requirements list and make sure the evaluation criteria includes anything pertinent from the requirements list.

Oct 152018

Critical Evaluation of Concepts generated

Concept 1-SonarFor Figure 2.1 below shows Concept 1-Sonar, a turbine will collect the wind, an electric motor will propel the vehicle forward, and multiple motors will be used to turn and navigate the track. To convert the collected wind energy, this design will use a generator turned by the turbine to create DC electrical energy, which can then be stored in a battery. The electrical energy stored in the battery will be converted to motion through the use of a DC electrical motor, that form of motion will be converted to a more useful type of motion by a gear system, and wheels will transfer the motion to forward motion by the vehicle. This design will use a button to activate the device, sonar sensors to read data, and programming to determine the executable-that is, whether it should turn or drive forward.

Oct 112018

Concept Creation

Concept 1 – Sonar

For Figure 2.1 below shows Concept 1-Sonar, a turbine will collect the wind, an electric motor will propel the vehicle forward, and multiple motors will be used to turn and navigate the track. To convert the collected wind energy, this design will use a generator turned by the turbine to create DC electrical energy, which can then be stored in a battery. The electrical energy stored in the battery will be converted to motion through the use of a DC electrical motor, that form of motion will be converted to a more useful type of motion by a gear system, and wheels will transfer the motion to forward motion by the vehicle. This design will use a button to activate the device, sonar sensors to read data, and programming to determine the executable-that is, whether it should turn or drive forward.

Reality Check: This design concept meets all the criteria for the Requirements List. The battery, gear system, and motor ensure that the device is able to propel itself forward, and it has a mechanism to facilitate forward motion, I.e. the wheels. The parts selected for this design can all be purchased, making them standardized and easy to replace. Furthermore, this does not place any restrictions on the requirement that parts can be replaced with little effort. The turbine-generator-battery combination makes it possible for this concept to fulfill the requirements that the device can convert the moving wind into another form of energy and store it. Lastly, using programming and sonar sensors, this device will be able to complete the tasks recognizing when it needs to turn, and turning itself in a controlled manner will be accomplished by a gear system.

Figure 1: Concept 1-Sonar

Oct 042018

Morphological Charts

Chart 1 – Materials

The first morphological chart, shown in Table 2.1 shows the options for controlling material in the system.

Oct 012018

Function Structure

A function structure is a tool to show the flow of materials, energy and information within a system. The material flow represents the device, the energy flow is how the device is powered, and the information flow is what controls the device. A complete function structure should have a clear boundary, with both inputs and outputs crossing the boundaries, and it should show where material, energy, and information flows intersect, demonstrating how they interact with one another. Furthermore, a function structure must be solution neutral, and sub-functions must be represented by verb-noun tuples. Figure 2.1 below shows Team Breaking Wind’s function structure for Project WindBAG.

Sep 202018

House of Quality

Going through the exercise of house of quality (HOQ), we have learnt numerous aspects of getting started with building our requirements. At first, we were able to determine the expectations and determine who are customers are. This step is important in designing products that are user-focused rather than designer focused. Since we were able to identify 14 different requirements after an intensive brainstorming session (see picture 1.5), we feel quite prepared to try to meet all of those customer requirements. By looking at all of these customer’s wants, we can definitely confirm that we are building a robot that is user-centered towards satisfying them to the best of our capability. Using the HOQ, we were also able to find a way to quantify all of the above qualitative wants of the customers.

Sep 152018

Problem Statement  

We are tasked with creating a device that is capable of collecting energy from moving air, converting it to a form that can be stored, and storing that energy. The device must then use that stored energy to propel itself forward and have systems in place to allow it to steer itself around a particular track for at least one lap. Further, the device must be able to carry as large a payload as possible for additional points. The device will have 5 minutes to collect as much wind as possible from a specified fan. The track which it must navigate is a 5-foot by 10-foot rectangle with a 1-foot by 6-foot barrier centered in the track. The walls of the track are 2 feet high, and the device is not allowed to have a mechanism to mechanically follow the walls of the track. Aside from the energy collected from the fan to propel the mechanism forward, a separate power source is allowed to power ONLY a “brain” to execute programming.

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