Figure 14From: Principle and Control of Active Engine Mount Based on Magnetostrictive ActuatorComparison between estimated system state and real system state under variable engine speed condition (engine speed increased from 750 r/min to 2100 r/min): a \({X}_{1}\): engine displacement, b \({X}_{2}\): engine velocity, c \({X}_{3}\): sprung mass displacement, and d \({X}_{4}\): sprung mass velocityBack to article page