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A macro–micro composite precision positioning stage is mainly used in microelectronics manufacturing to achieve high velocity, high precision, and large-stroke positioning. The positioning accuracy and working efficiency of the stage are influenced by the inertial vibration caused by motion with high acceleration. This paper proposes an active vibration reduction (AVR) method employing a piezoelectric...
Because die-bonding mechanism is precision machinery, the high-speed bonding head must be meet designed displacement and the force must be kept within a certain range. In this paper, a 3D model of a bonding mechanism was designed and implemented within SolidWorks® software, and analyzed dynamically in ADAMS® software. Through the motion simulation to designed velocity, the displacement curve and the...
A bearingless permanent magnetic synchronous motor (BPMSM) has combined the characteristics of a permanent magnetic synchronous motor and magnetic bearings. The rotor suspension force is closely related to the air gap magnetic field of the torque windings. So accurately getting the magnitude and phase of the air-gap magnetic field on the torque windings is the key to precisely control the levitation...
With the every decreasing pitch spacing of required in the microelectronic packaging industry, higher bond quality is required. In order to further understand the mechanics of the bonding operations, the vibration of the transducer is being studied to identify how bonding quality can be improved. In this paper a computational efficient method of analysing the vibration of the transducer is described,...
In the wire bonding process, different combinations of parameter values will directly affect wire bonding quality. The optimal combination of these parameter values is very important to ensure the overall process quality response. Therefore, it is necessary to investigate the effects and interactive relationship of the bonding parameters on the bonding quality. This paper chooses the response factors...
The potential filed method is proposed to solve the bottom navigation problem of an underactuated autonomous underwater vehicle, including the bottom avoidance problem and the bottom following problem. The desired depth is treated as a stationary goal and the sea bottom is a moving obstacle in the bottom avoidance problem. And the desired altitude above the bottom is a moving goal and the maximum...
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