k. mease 10/11/06 1 mechanical & aerospace engineering henry samueli school of engineering...
TRANSCRIPT
K. Mease 10/11/061
Mechanical & Aerospace Engineering
Henry Samueli School of EngineeringUniversity of California, Irvine
K. D. MeaseProfessor
SAE Aerospace Control and Guidance Systems CommitteeWilliamsburg, Virginia
October 11, 2006
K. Mease 10/11/062
UCI Mechanical & Aerospace Engineering
21 Faculty, 4 Adjunct460 Undergraduate students100 Graduate students
K. Mease 10/11/063
Aerospace Program of Excellence
• 1 Guidance, Navigation and Control assistant professor hired last year
• Recruiting for 4 new aerospace faculty
– 2 Structures
– 1 Space Power and Propulsion
– 1 Space Systems
K. Mease 10/11/064
Research and Educational Activities of K. Mease
Research Projects:
• Model Decomposition for Multiple Time-Scale Nonlinear Dynamical Systems (NSF)
• Entry Guidance for Mars Landing (JPL)• Flight Control via Internal Moving Mass (Optimal Synthesis, MDA)
Undergraduate Design Project: UCI Rocket Project (25 students)
K-12 Outreach: COSMOS summer program (25 students)
Classroom Teaching:
Undergrad: Dynamics and Control of Flight Vehicles
Grad: Applied Math, Optimal Control, Nonlinear Control
K. Mease 10/11/067
Hypersonic Entry Guidance Advances
Motivation:
• Reduce 3D position error at supersonic decelerator deployment point
• Accommodate broader class of landers relative to MSL baseline guidance
– Angle of attack modulation
– Higher L/D
– Active path constraints (heating, g-load, dynamic pressure)
• Increase levels of adaptability, mission flexibility and on-board autonomy
Benefits:
• Pinpoint delivery to parachute deployment
• Reduce propellant required for pinpoint landing
• Establish mature guidance approach for larger range of landers
Ellipsled L/D 0.3 – 0.8MSL type lander L/D 0.18 – 0. 25
Human Mission
K. Mease 10/11/068
Improved Chute Deploy Position Control
• Developed “position
guidance” – Switch from drag-based
hypersonic guidance to position guidance to improve parachute deployment position control
– Vertical as well as horizontal position control at chute deploy is important
– Enables higher elevation landing sites and reduces propellant req’ts. for pinpoint landing terminal descent
300 350 400 450 500
4000
6000
8000
10000
12000
14000
Velocity, m/s
Alti
tude
, m
300 350 400 450 500
4000
6000
8000
10000
12000
14000
Velocity, m/s
Alti
tude
, m
Before
After
K. Mease 10/11/0612
COSMOS
• COSMOS = California State Summer School for Mathematics & Science. Advisory Board Chair: Gayle Wilson, former 1st Lady of CA
• 4 week summer residential academic experience for top CA high school students in math and science
• Mission statement: “… motivate the most creative minds of the new generation of prospective scientists, engineers and mathematicians …”
• Programs at UCI, UCSD, UCD, UCSC• UCI Mechanical and Aerospace Engineering Cluster
2003, 2004, 2006. Lectures and labs. Design, build, fly R/C airplanes.