Mark Ryan
Lecturer
- Milwaukee WI UNITED STATES
- Allen Bradley Hall of Science: S127
- Mechanical Engineering
Mark Ryan is a lecturer in MSOE's Mechanical Engineering Department.
Education, Licensure and Certification
M.S.
Mechanical Engineering
Ohio State University
2012
B.S.
Mechanical Engineering
University of Toledo
2007
Biography
Areas of Expertise
Selected Publications
Peak Input Torque Minimization of a Flapping Wing Mechanism for MAVs
54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Structures, Structural Dynamics, and Materials and Co-located ConferencesSu, H., Ryan, M.
2013
Flapping wing micro air vehicles (MAVs) are desired for surveillance and reconnaissance in confined spaces, and should exhibit small scale flight with the following abilities: obstacle avoidance, hovering, and slow flight speed. One of the major components of MAVs is the flapping mechanism, which actuates wings to generate sufficient lift and propulsion force. The use of compliant elements in flapping wing MAVs is a possible solution to the decreased power transmission inherently present in the scaling of traditional rigid body mechanisms. To demonstrate the effectiveness of compliant elements, an extension spring and compliant joint were incorporated into the University of Maryland's Small Bird MAV. The motor torque was derived in terms of the rigid body mechanics, and compliant parameters optimized using an interior point algorithm to minimize the peak motor torque throughout the flapping cycle. Under the assumption of constant aerodynamic load on the wings, the extension spring and compliant joint mechanisms resulted in a 89:25% and a 97:1% reduction in the motor torque from the rigid body mechanism, respectively. To validate this analytical solution, the mechanisms were modeled in MSC Software's ADAMS simulation engine. © 2013 by the American Institute of Aeronautics and Astronautics, Inc. All rights reserved.
Classification of Flapping Wing Mechanisms for Micro Air Vehicles
ASME International Design Engineering Technical Conferences/Computers Information in Engineering ConferenceRyan, M., Su, H.J.
2012
The purpose of this paper is to categorize the current state of technology in flapping wing mechanisms of micro air vehicles (MAVs). One of the major components of MAVs is the flapping mechanism, which actuates wings to generate sufficient lift and propulsion force. The goal of the flapping wing mechanism design is to develop a highly efficient and highly robust mechanism, which converts the input motion, either rotational or translational, to a beating motion at a frequency ranging from several to hundreds of Hz. The current practice of designing flapping mechanisms follows an ad-hoc approach with multiple design, build, and test cycles. This design process is very inefficient, costly, time-consuming, and not applicable to mass production of MAVs. This work will be an important step towards a systematic approach for the design of flapping mechanisms for MAVs. In this paper, we will study 15 flapping mechanisms used in recent MAV projects worldwide. We classify these mechanisms based on workspace, compliant or rigid body, type synthesis, mobility, and actuator type. This survey of mechanism classification will serve as a resource for the continued design and development of smaller and more efficient MAVs.
Biomechanical and computational evaluation of two loading transfer concepts for pancarpal arthrodesis in dogs
American Journal of Veterinary ResearchRothstock, S., Kowaleski, M.P., Boudrieau, R.J., Beale, B.S., Piras, A., Ryan, M., Bouré, L., Brianza, S
2012
Objective: To evaluate 2 plate designs for pancarpal arthrodesis and their effects on load transfer to the respective bones as well as to develop a computational model with directed input from the biomechanical testing of the 2 constructs.
