This control architecture uses a model following approach to provide ACAH control mode in pitch and roll axes.
Two characteristics make this MCLAWS different from : (1) this MCLAWS implements an ACAH response type using only the 10% SAS (Stability and Augmentation System) series servos with no trim actuators; (2) the application of a modern integrated toolset (MATLAB/Simulink, CIFER, CONDUIT, etc.) plays a central role in this MCLAWS design process and facilitates the MCLAWS development.
In order to implement an ACAH flight mode (see Figure 4) in hover and low speed, University of Leicester designed [H.sub.[infinity]] controller against coprime factor uncertainties using a loop shaping procedure followed by a robust stabilization.
Caption: Figure 2: Implementation of ACAH mode into UH-60's MCLAWS model following control architecture.
Accordingly, we shortlist firms from the ACAH that belong to the following four-digit SIC: SIC 1521 (Single-family Housing Construction), SIC 1531 (Operative Builders), 2451 (Mobile Homes), and 2452 (Prefabricated Wood Buildings).
Our sample of lumber-using industry (also referred to as downstream industry) draws from two sources, the membership of the ACAH and the Encyclopedia of American Industries prepared by Gale Group.
(13.) We have tried to be very careful in choosing our sample for industrial users of lumber, because not all members of ACAH are direct consumers or users of softwood lumber.