CAJ | 학술논문

为了提高3自由度气浮台的仿真精度,减小重力引起不平衡力矩的影响,提出气浮台弹性不平衡力矩的计算及补偿方法.建立气浮台重力引起的静态、弹性、重力梯度和总不平衡力矩的计算模型,分析重力引起的各类不平衡力矩关系及影响.通过对比发现气浮台质心位置相对回转中心较远时,静态不平衡力矩起主要作用.随着质心位置接近回转中心,弹性不平衡力矩逐渐成为影响气浮台平衡的主要因素,此时质心位置与回转中心距离的减小已不起作用,说明弹性不平衡力矩是制约气浮台精度提高的主要因素.提出静态不平衡力矩与弹性不平衡力矩相互补偿的原理,给出自动调平衡系统补偿算法.试验结果表明采用补偿方法是减小气浮台不平衡力矩的有效措施.
위료제고3자유도기부태적방진정도,감소중력인기불평형력구적영향,제출기부태탄성불평형력구적계산급보상방법.건립기부태중력인기적정태、탄성、중력제도화총불평형력구적계산모형,분석중력인기적각류불평형력구관계급영향.통과대비발현기부태질심위치상대회전중심교원시,정태불평형력구기주요작용.수착질심위치접근회전중심,탄성불평형력구축점성위영향기부태평형적주요인소,차시질심위치여회전중심거리적감소이불기작용,설명탄성불평형력구시제약기부태정도제고적주요인소.제출정태불평형력구여탄성불평형력구상호보상적원리,급출자동조평형계통보상산법.시험결과표명채용보상방법시감소기부태불평형력구적유효조시.
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 rotation center. With the mass center approaching to rotation center, elastic unbalance torque is gradually becoming the main factor affecting the air-bearing platform balance. Then closing the distance between mass center and rotation center 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.