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This paper presents the development of a dynamic ball-and-plate system successfully completed for a one-semester Senior Capstone Design project. A group of five undergraduate students developed the project concept and constructed a prototype within a semester, integrating major mechatronics engineering concepts learned in classes. The three-degree-of-freedom system consists of sensors, actuators, and controls to keep a free rolling ball in a desired position on a flat plate, accounting for any possible external disturbances. Due to its complexity, multiple steps were taken to solve the design challenges and develop the system. The major works were mathematical modeling, kinematic constraints and dimensional analysis, simulations, and construction of the system. The control system required an effective control strategy and a thorough analysis of system parameters. The system's feasibility and optimal operation were fully considered in the design phase. The design was then validated by simulations using Simulink/MATLAB™ and experimental testing. The completion of the system development provided the understanding of analyzing different control designs on various system parameters based on multidisciplinary mechatronics design principles. Lastly, the class outcomes confirmed the effectiveness of students' learning on multidisciplinary mechatronics engineering through this hands-on project as an assessment of the design project presented. [ABSTRACT FROM AUTHOR]

For large enrollment courses, such as Statics, Dynamics, Fluid Mechanics, Solid Mechanics, Thermodynamics, the use of computers (laptops and tablets) in the classroom can save instructor time. However, there are numerous problems with computer-based exams, especially when the students are allowed to access online course materials (eBook, homework, etc). Previously, the author used student-supplied laptops for web-based exams in the classroom, but this has become problematic over the years due to the increased sophistication of communication software (Twitter, Facebook, Skype, SnapChat, etc.). It is no longer reasonable to expect the instructor and TAs to be able to monitor student laptops during exams. To solve this issue, android-based tablets with special apps have been developed and implemented into two fundamental engineering courses, Fluid Mechanics and Solid Mechanics (Mechanics of Materials). The paper first examines both the selection process for the Android-based tablets and the development process for applications (apps) required for testing. Both Android and iOS tablets were considered. Based on cost and ease of system customization, Android-based tablets were selected. Two different apps were developed for use for tests. The first app, "examApp" permits the student to access the online text and it records the student's choices. It has numerous security features that limit access to the exam only on the tablets provided and only during the test time. All graphics are vector-based so they are crisp on high resolution screens. Included in the examApp was an admin (or instructor) page that provides the instructor and TAs real-time information about the exam while in progress. This includes scores, percent correct for a given problem, students activity, graphs, and direct communications to all students. The second app, "eBookApp", allows the student access to the online eBook used for the class. However, it blocks the student from other online web site or material. The Android operating system itself was modified to limit access to standard apps like email, app stores, social networks, and even browsers. The apps were developed using Abobe AIR development framework due to its relatively easy development of web and mobile apps when compared to native programming or HTML5 with JavaScript. AIR also avoids programming the same app three times (web browsers, Android and iOS). The successful results (and lessons learned) using tablets for in-class testing for multiple engineering courses are presented. [ABSTRACT FROM AUTHOR]