首页|A Precision-Positioning Method for a High-Acceleration Low-Load Mechanism Based on Optimal Spatial and Temporal Distribution of Inertial Energy

A Precision-Positioning Method for a High-Acceleration Low-Load Mechanism Based on Optimal Spatial and Temporal Distribution of Inertial Energy

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High-speed and precision positioning are fundamental requirements for high-acceleration low-load mechanisms in integrated circuit (IC) packaging equipment.In this paper, we derive the transient nonlinear dynamicresponse equations of high-acceleration mechanisms, which reveal that stiffness, frequency, damping, and driving frequency are the primary factors.Therefore, we propose a new structural optimization and velocity-planning method for the precision positioning of a high-acceleration mechanism based on optimal spatial and temporal distribution of inertial energy.For structural optimization, we first reviewed the commonly flexible multibody dynamic optimization using equivalent static loads method (ESLM), and then we selected the modified ESLM for optimal spatial distribution of inertial energy;hence, not only the stiffness but also the inertia and frequency of the real modal shapes are considered.For velocity planning, we developed a new velocity-planning method based on nonlinear dynamic-response optimization with varying motion conditions.Our method was verified on a high-acceleration die bonder.The amplitude of residual vibration could be decreased by more than 20％ via structural optimization and the positioning time could be reduced by more than 40％ via asymmetric variable velocity planning.This method provides an effective theoretical support for the precision positioning of high-acceleration low-load mechanisms.

high-acceleration low-load mechanismprecision positioningspatial and temporal distributioninertial energyequivalent static loads method (ESLM)velocity planning

Xin Chen、Youdun Bai、Zhijun Yang、Jian Gao、Gongfa Chen

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The Key Laboratory of Mechanical Equipment Manufacturing & Control Technology of Ministry of Education,Guangdong University of Technology,Guangzhou 510006,China

National Key Basic Research Program of ChinaNational Natural Science Foundation of ChinaGuangdong Provincial Natural Science FoundationScience and Technology Program of GuangzhouGuangdong Provincial Science and Technology Plan

2011CB013104U11340042015A0303120082015100102812013B010402014

2015

10.15302/J-ENG-2015063

工程科学(英文版)
中国工程院出版委员会

工程科学(英文版)

影响因子：0.226
ISSN：1672-4178
年,卷(期)：2015.1(3)
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