A controller, or a compensator is an additional system that is added to the plant to control the operation of the plant. The system can have multiple compensators, and they can appear anywhere in the system: Before the pick-off node, after the summer, before or after the plant, and in the feedback loop.
B unit of the Russian 3TE10MK locomotive. A B unit, in railroad terminology, is a locomotive unit (generally a diesel locomotive) which does not have a driving cab or crew compartment, and must therefore be controlled from another, coupled locomotive with a driving cab (an A unit). The terms booster unit and cabless are also used.
Similar units Edit. The blob or slinch (a portmanteau of the words slug and inch) is an inch version of the slug (1 slinch = 1 lb f Â·s 2 /in = 12 slugs).Slang terms for the slinch include the slugette. Metric units include the glug in the centimeter-gram-second system, and the mug, par, or MTE in the meter-kilogram-second system.he name slug, as a unit of inertia, was coined before 1900 by British physicist Arthur Mason Worthington, but it did not see any significant use until decades later. A 1928 textbook says: No name has yet been given to the unit of mass and, in fact, as we have developed the theory of dynamics no name is necessary.