An abbreviation that stands for "six degrees of freedom." A 6DOF simulation models the motion of bodies using three degrees of freedom for translational motion and three degrees of freedom for rotational motion. 6DOF motion accurately represents the motion of rigid bodies in the real world.

Any simulation variable that does not represent a continuous or discrete state. See State Variable.

A form of distortion that occurs when a continuous signal is sampled at too low of a frequency. It occurs when the continuous signal contains components with frequencies greater than one-half the sampling frequency. Aliasing can be reduced or eliminated by sampling at a higher frequency or by filtering the continuous signal to attenuate signal components at frequencies above half the sampling frequency.

Bode plots display the amplitude and phase of the response of a system to a sine wave input signal across a range of frequencies. In a Bode magnitude plot, the frequency appears on the horizontal and the response magnitude appears on the vertical axes using logarithmic scaling. In a Bode phase plot, the frequency appears on the horizontal axis with logarithmic scaling and the response phase appears on the vertical axis using linear scaling. Bode plots are widely used in stability analysis and control system design.

A dynamic system described by a combination of differential equations and difference equations. Combined systems contain both continuous-time elements and discrete-time elements.

A dynamic...