This system produces repulsion against the magnet inside pendulum and drives it to move by controlling the field direction of the electromagnetic coil,and controls the angle and the swinging period of the pendulumby controlling the position and the moving cycle of the coil.%系统通过控制电磁线圈的磁场方向对摆杆中的磁铁产生斥力推动摆杆运动,并通过控制线圈的位置和运动周期从而控制摆杆的角度和摆动周期。
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