PURPOSE: A rapid control method is provided to be suitable for a control system of the actual spot and to quantitatively indicate how a control algorithm affects a control performance. CONSTITUTION: A rapid control method comprises producing the first control input corresponding to a target acceleration, a velocity error and a position error of a control object, producing an error input corresponding to an acceleration error, a velocity error, and a position error of the control object, producing the second control input by integrating the error input and dividing the integrated result by an n power of an L2 gain value, making a control input value by adding the first control input and the second control input, and adjusting the control input value by varying the L2 gain value.
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