closed-loop configuration
41Geometric phase — In mechanics (including classical mechanics as well as quantum mechanics), the Geometric phase, or the Pancharatnam Berry phase (named after S. Pancharatnam and Sir Michael Berry), also known as the Pancharatnam phase or Berry phase, is a phase… …
42Torsion tensor — In differential geometry, the notion of torsion is a manner of characterizing a twist or screw of a moving frame around a curve. The torsion of a curve, as it appears in the Frenet Serret formulas, for instance, quantifies the twist of a curve… …
43automata theory — Body of physical and logical principles underlying the operation of any electromechanical device (an automaton) that converts information input in one form into another, or into some action, according to an algorithm. Norbert Wiener and Alan M.… …
44Maintenance, repair, and operations — Mechanical repair Maintenance, repair, and operations[1] (MRO) or maintenance, repair, and overhaul[2] involves fixing any sort of …
45Brushless DC electric motor — A microprocessor controlled BLDC motor powering a micro remote controlled airplane. This external rotor motor weighs 5 grams, consumes approximately 11 watts (15 millihorsepower) and produces thrust of more than twice the weight of the plane …
46Neuroethology — Echolocation in bats is one model system in neuroethology Neuroethology (from Greek νεῦρον neuron nerve and ἦθος ethos habit or custom ) …
47Timeline of Islamic science and engineering — This timeline of Islamic science and engineering covers the general development of science and technology in the Islamic world during the Islamic Golden Age, usually dated from the 7th to 16th centuries.From the 17th century onwards, the advances …
48Component parts of internal combustion engines — Internal combustion engines come in a wide variety of types, but have certain family resemblances, and thus share many common types of components. Contents 1 Combustion chambers 2 Ignition system 2.1 Spark 2.2 Compression …
49Covering space — A covering map satisfies the local triviality condition. Intuitively, such maps locally project a stack of pancakes above an open region, U, onto U. In mathematics, more specifically algebraic topology, a covering map is a continuous surjective… …
50H-infinity methods in control theory — H ∞ (i.e. H infinity ) methods are used in control theory to synthesize controllers achieving robust performance or stabilization. To use H ∞ methods, a control designer expresses the control problem as a mathematical optimization problem and… …
