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note the armature current is produced in pulses as the armature rotates under the poles so the torque also pulsatesthis can give rise to extra
the observations from these experiments led to the laws of electromagnetic induction1 if the magnetic flux threading through an
faraday conducted a series of experiments on coils in a magnetic fieldhe found that if the magnetic flux density threading a coil were changed
controller requirements the requirements for the stability and performance of fight control systems are specified in the certi-fication
representations of a linear systemthe linear system of section is shown in block diagram to determine the responseof the output of the system yt to
characteristic equationthe characteristic equation ce corresponding to the linear state space equations comprising the state equationx ax buand
linear state space equationslinear state space equations consist of a difierential state equationx ax buand an algebraic output equationy cx
static stability derivativesstatic stability requires that a restoring action to any motions caused by forces and moments is auto-matically produced
rotational stability equations the torque t applied to any rigid vehicle with moving cg is in general determined byt parthvepartte uve
notation for body axesthe standard notation for the body axis sytem for aircraft dynamics this sectionexplains the significance of the term body axis
when a current is passed through a conductor a magnetic field is created in its surroundingswe can represent this magnetic field by drawing
notation for body axesthe standard notation for the body axis sytem for aircraft dynamics this sectionexplains the signicance of the term body axis
electric drives is a term used to describe dc and ac electric motors that provide continuous rotarmotion they are often controlled by electronic
representing vectors in different axesall positions velocities momentums and accelerations are really relative positions relative velocities
the terms roving and yarn are widely used a roving is a collection of untwisted strands wound together a yarn is a generic term for a continuous
unidirectional fabrica unidirectional ud ply is one in which all of the fibres run in one direction only a small amount of fibre or other material
modern complex systems are normally constructed by interconnecting sub-unitstherefore the systems engineer is often not too concerned about the
the conflict between too hot and too cold or too slow and too fast can be resolved using dont care statesdont care states are used wheni the
biscuits move on a conveyer through an oven where they are cooked two sensors h and c measure the temperature of the oven h 1 if the oven
1 all squares containing a 1 must be grouped2 the largest possible groups must be formed3 groups can overlap if this allows larger groups to be
installing fluent on a mws machine fluent was originally developed on unix and graphical output was provided by calls to the x windows graphics
essentially the strategy of cfd is to replace the continuous problem domain with a discrete domain using a grid domain with a discrete domain
more complicated logic circuits can be made byconnecting a number of simple logic gateshow do we decide how to connect the gates togive a particular
when designing a logic circuit with multipleoutputs it is usual to treat it as several circuitseach with one output so for our example wewould design
any function can be expressed in a truth tablea truth table lists all possible combinations ofinputs and gives the output produced in eachcasetruth