In this experiment, we examine the non-linear dynamics of a mechanical system consisting of an inverted pendulum with one free-turning rotational degree-of-freedom attached to a computer-controlled cart with one linear degree-of-freedom. Using a Quanser Linear Servo Base Unit with Inverted Pendulum and paired software package, we used first principles to develop the non-linear control system needed to move the pendulum from stable equilibrium to unstable equilibrium and maintain unstable equilibrium. This combines the self-erecting inverted pendulum experiment and the classic pendulum experiment. Through the paired software package, we were able to derive the dynamic equations to develop the transfer function and proportional-velocity feedback system that describe the linear motion of the cart, successfully creating the non-linear control system for both phases of the experiment.
This report examines the function, accuracy, and ease of use of an XBOX Kinect™ as a 3D surface scanner. The purpose of this experiment is to demonstrate the utility of a Kinect™ for XBOX 360 (Microsoft®) paired with Skanect (Occipital) and MeshLab software packages as a low cost solution to surface scanning and processing. My conclusion is that the Kinect™ is able to accurately model the recorded point cloud as a continuous 3D surface that matches the contour and scale of the test subject surface. Both Skanect and MeshLab effectively interpolated the smoothing of the 3D surfaces and provided higher resolution imaging than an unaltered image. The resultant resolution of the contoured surface is higher than the resolution of the 3D printers used in this experiment, demonstrating an effective digital duplication of a physical surface.
Author(s): Lauren Getz Engineering Robin Livesay Engineering Nathan Loewen Engineering Karla Lopez Engineering
Advisor(s): Robert Bittle Engineering
Location: Session: 2; 3rd Floor; Table Number: 4
For this project, a digital grip gauge was designed for Lockheed Martin to measure the grip length of the aircraft skin of the F-35. The objective of the electrical group is to ensure that the gauge will be capable of recognizing when the measurement has stabilized. When stabilized, a light will turn on, which allows the operator to know the measurement is ready for reading. We developed three prototypes to complete this objective. The three prototypes utilize Arduino, comparators, or push buttons. While each of these prototypes satisfies the objective, the third prototype was ultimately selected due to size constraints of the gauge design.
Compressive line sensing is a process of acquiring data and reconstructing images. The objective of this study is to explore the impact of the two parameters that are used in the image reconstruction algorithm on the quality of the reconstructed image. These two parameters are the compression ratio and the line group. The compression ratio is the ratio of the number of measurements taken at each line vs. the resolution of each line. The line group is the number of lines that are grouped together and solved jointly when reconstructing the image. A higher compression ratio results in degraded image quality because less measurement data is used to reconstruct the image. The larger the line group, the better the quality of the image at a cost of longer computation time. The key is to find a balance between the compression ratio and line group choices so that the image is reconstructed with as little data as possible while still maintaining a high image quality. We will present images reconstructed with different compression ratio and line group based on the data obtained in air and in water.
The highest electric power demand in the lower temperate and equatorial zones is encountered during summer months, when air-conditioning systems are invariably and almost continuously used in commercial and residential buildings. During the summer months the electric power corporations utilize most of their generating capacity, including smaller units that are older and significantly less efficient. Because high ambient temperatures, the need for air conditioning, and the available solar energy are highly correlated, solar energy is a suitable energy source to supplement and, eventually, replace the fossil fuel power plants to satisfy the burgeoning air-conditioning demand in the summer months. Since solar energy is periodically variable, a zero-energy building must also include a reliable system for energy storage. This paper presents a detailed hourly analysis of the power needs, the seasonal energy usage and the seasonal energy storage requirements of a zero-energy building in the South-West part of the USA, where air-conditioning demand is significant. The input data for the calculations include the hourly electric power demand during a typical year. The hot water and space heating needs of the building are satisfied by a heat pump that uses the electric power produced by photovoltaics. Two energy storage systems are considered, hydrogen storage and solid-state batteries. The paper reports the actual hourly electric power and energy demand of the building throughout the year; the hourly energy production by a system of photovoltaics; the hourly energy storage needs throughout the year; the overall photovoltaics area requirements; the overall capacity and seasonal use of the energy storage system needed; and the effects of the various component and systems performance/efficiencies on the overall area of photovoltaics needed and energy storage requirements for the building to become grid independent.
Author(s): Evan Schmitzberger Engineering Steven Culver Engineering Avery McGrath Engineering Robbie Schwarz Engineering
Advisor(s): Robert Bittle Engineering
Location: Session: 1; 2nd Floor; Table Number: 4
The objective of our work is to design and build a depth gauge that efficiently and accurately measures the depth of a narrow hole, and give feedback via an electronic screen on the device. This design is being made for Lockheed Martin and will allow their employees to measure a large amount of rivet holes both quicker and more accurately than their current solution. Speeding up the measuring process while retaining accuracy will cut down on production time significantly. Our design was founded on the idea of a small hole gauge, we modified the gauge to be set up as a probe and anchor onto the back side of the hole. The probe has been coined as a “split-ball” due to its inner shaft splitting the outer shaft that contains a ball type end effecter. Our prototype has been through many iterations utilizing the on campus Fab Lab to 3D print most of our parts. Our mechanical team has been in close work with our electrical team to ensure that the mechanics and electronics function together seamlessly.
Author(s): Logan Smith Engineering Rachel Frank Engineering Braden Frullo Engineering Marissa Hayes Engineering
Advisor(s): Robert Bittle Engineering
Location: Session: 1; B0; Table Number: 7
The objective of our work is to design and build a depth gage that efficiently and accurately measures the depth of a narrow hole, and give feedback via an electronic screen on the device. This design is being made for Lockheed Martin and will allow their employees to measure a large amount of rivet holes both quicker and more accurately than their current solution. Speeding up the measuring process while retaining accuracy will cut down on production time significantly. Our design is small enough to be held in one hand and contains a wire probe that is plunged into the hole and latches onto the other side. The probe is “Tweezer-like” in design, with two wires that collapse and expand with the use of a button. Many parts of our design are made using a 3D printer for convenience and repeatability. Our design is able to communicate with electronics stored within the gage that measures the depth and displays to an LCD screen.
Klein Tools is a major hand tools manufacturer in US focused on electrical and utility applications for professionals. One of Klein Tools products is called a fish rod that is used by professional electricians to pull wiring through walls, conduit, and plenums to route wire from one place to another. The current fish rod assembly process at Klein Tools involves manual dispensing of glue into the metal connectors before affixing them to fiberglass rods. The objective of this Klein Tools-sponsored project is to improve the throughput of assembly system and increase the accuracy and the consistency of the amount of glue dispensed to reduce product failures and adhesive waste.
The overall system in development consists of an automated metal connector orientation system, conveyor belt assembly, a glue dispensing system and a control system. Through the application of vibratory hopper feeders, pneumatic rotary tables and grippers, sensing cameras, break line sensors, and a conveyor belt, the system will orient the metal connectors glue side up, and present the connectors with adhesive to the operator for final assembly of the fish rods.
The goal of this project is to develop a small electric vehicle that can operate autonomously or from user commands. The vehicle would be useful in cases where it is dangerous or impossible for a human to complete a task, such as risk of infectious diseases, cave-ins, or explosions. The desired functions include facilitating communication with quarantined patients, scouting dangerous buildings and caves, and developing a virtual map of its surroundings.
In the future, we will upgrade from the current proof of concept model to more a powerful and reliable base vehicle to build the desired functionality onto. We will write programs allowing remote control of the vehicle, and affix cameras and sensors to improve performance for both manual and autonomous operation. To create a virtual map of the vehicle’s surroundings, we will develop software to observe locations of walls and obstacles and transfer that data back to a computer to create a virtual map.