Thrust Vector Control of an Upper-Stage Rocket with Multiple Propellant Slosh Modes

Thrust Vector Control of an Upper-Stage Rocket with Multiple Propellant Slosh Modes

The thrust vector control problem for an upper-stage rocket with propellant slosh dynamics is considered. The control inputs are defined by the gimbal deflection angle of a main engine and a pitchingmoment about the center of mass of the spacecraft. The rocket acceleration due to themain engine thrust is assumed to be large enough so that surface tension forces do not significantly affect the p...

Thrust Vector Control Robustness of axial-symmetric Launch Vehicles with Fuel Slosh

Clearance of Thrust Vector Control (TVC) laws for launchers demands the capability to provide analytical certificates for the system’s robust stability. During exo-atmospheric flight, a key role is played by the ability to deal with non rigid-body effects such as fuel sloshing. Depending on its frequency and magnitude, sloshing can easily deteriorate the performance of the TVC laws to the point...

Specific Impulse and Ignition Delay Time Assessment for DMAZ with Liquid Oxidizers for an Upper Stage Rocket Engine

2-Dimethyl amino ethyl azide (DMAZ) has attracted much attention as a suitable liquid fuel replacement for monomethyl hydrazine (MMH) and unsymmetrical dimethyl hydrazine (UDMH) in propellant systems because, in contrast to these fuels, it is noncarcinogen. In this research, performance, and ignition delay time of DMAZ were studied with common liquid oxidizers such as inhibited red fuming n...

Upper Stage Employing a Rotating-solid-rocket Attitude Control System and a Comparison with Analog Studies

A Dynamical Model of Rocket Propellant Loading with Liquid Hydrogen

1 Leading Researcher, MCT, Inc., NASA Ames Research Center, Moffett Field, CA, 94035, USA. 2 Associate Scientist, Intelligent Systems Division, NASA Ames Research Center, Moffett Field, CA 94035, USA. AIAA Member. 3 Associate Professor, Department of Mathematical Sciences, New Jersey Institute of Technology, Newark, NJ, 07102, USA. 4 Professor, Physics Department, South Dakota School of Mines a...