Model Predictive Control Allocation

• Main Author: Hanger, Martin Bøgseth
• Format: Others
• Language: English
• Published: Norges teknisk-naturvitenskapelige universitet, Institutt for teknisk kybernetikk 2011
• Subjects: ntnudaim:5964; MTTK teknisk kybernetikk; Reguleringsteknikk
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13308

This thesis developes a control allocation method based on the Model Predictive Control algorithm, to be used on a missile in flight. The resulting Model Predictive Control Allocation (MPCA) method is able to account for actuator constraints and dynamics, setting it aside from most classical methods. A new effector configuration containing two groups of actuators with different dynamic authorities is also proposed. Using this configuration, the MPCA method is compared to the classical methods Linear Programming and Redistributed Pseudoinverse in various flight scenarios, highlighting performance differences aswell as emphasizing applications of the MPCA method. It is found to be superior to the two classical methods in terms of tracking performance and total cost. Nevertheless, some restrictions and weaknesses are revealed, but countermeasures to these are proposed. The newly developed convex optmization solver CVXGEN is utilized successfully in the method evaluation. Providing solve times in milliseconds even for large problems, CVXGEN makes real-time implementations of the MPCA method feasible.