重力引起的3自由度气浮台各类不平衡力矩关系及影响
收稿日期: 2014-11-06
修回日期: 2015-09-27
网络出版日期: 2015-11-05
基金资助
国家自然科学基金(51305094)、辽宁省自然科学基金(201202161)和辽宁省教育厅一般项目(L2015386)资助项目
Received date: 2014-11-06
Revised date: 2015-09-27
Online published: 2015-11-05
李延斌 , 向东 , 高有华 . 重力引起的3自由度气浮台各类不平衡力矩关系及影响[J]. 机械工程学报, 2015 , 51(21) : 7 -14 . DOI: 10.3901/JME.2015.21.007
To improve three degrees of freedom air-bearing simulation accuracy and reduce the influence of unbalance torque caused by gravity, a method for calculating and compensating elastic unbalance torque is proposed. After computational model of static, plastic, gravity gradient and total unbalance torque being established, the relation and influence among all kinds of unbalance torque cause by gravity are analysis. It is discovered by contrast that static unbalance torque plays an important role when the platform mass center is far away from the rotationcenter. With the mass center approaching to rotationcenter, elastic unbalance torque is gradually becoming the main factor affecting the air-bearing platform balance. Then closing the distance between mass center and rotationcenter has nothing to do on reducing the unbalance torque, which shows that elastic unbalance torque is the main limiting factor for improving platform accuracy. The principle for mutual compensation between static unbalance torque and elastic unbalance torque is proposed and the compensation algorithm with automatic balancing system is provided. Experimental results have demonstrated application of the compensation method is an important channel for reducing unbalance torque.
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