专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

KR100424268B1 자기기록을위한자기저항성판독헤드의슬라이딩모드제어시스템및방법 失效
公开(公告)号：KR100424268B1
公开(公告)日：2004-07-19
申请号：KR1019980700292
申请日：1996-07-12
申请人： 사이러스 로직, 인코포레이티드
发明人： 로마노폴엠 , 수피노루이스
IPC分类号： G11B21/04
CPC分类号： G11B5/59683 , G11B5/5547 , G11B2005/0016
摘要： A sliding mode controller is disclosed for controlling the motion of a magnetoresistive (MR) read head actuated by a voice coil motor over a rotating magnetic disk storage medium. The magnetic disk comprises a plurality of concentric data tracks recorded thereon wherein each data track comprises user data and servo data. The sliding mode controller operates by multiplying a head position error phase state and a head position error velocity phase state by respective switching gains to force the phase states to follow a predetermined phase state trajectory. The phase state trajectory can be defined by a single linear segment, a variable linear segment, multiple linear segments over the entire region of excursion, or optimum parabolic acceleration and deceleration segments. Switching logic, responsive to the phase states and a trajectory segment value sigma , switches between positive and negative feedback gains to drive the phase states toward a current trajectory segment. A sigma processing block monitors the phase states to determine when to switch from a current trajectory segment to the next trajectory segment. The resulting servo control system is relatively inexpensive to implement in either software or hardware, and it is substantially insensitive to parametric changes, external load disturbances, and non-linearities inherent in controlling MR read heads. Further, it does not require notch filters commonly used in conventional linear controllers to compensate for mechanical resonances.
摘要翻译：公开了一种滑动模式控制器，用于控制由音圈电机致动的磁阻（MR）读取头在旋转磁盘存储介质上的运动。磁盘包括记录在其上的多个同心数据磁道，其中每个数据磁道包括用户数据和伺服数据。滑动模式控制器通过将头部位置误差相位状态和头部位置误差速度相位状态乘以相应的切换增益来操作，以迫使相位状态遵循预定的相位状态轨迹。相位状态轨迹可由单个线性段，可变线性段，整个偏移区域上的多个线性段或最佳抛物线加速段和减速段定义。响应于相位状态和轨迹段值σ的切换逻辑在正反馈增益和负反馈增益之间切换，以将相位状态朝向当前轨迹段驱动。西格玛处理模块监视相位状态以确定何时从当前轨迹段切换到下一个轨迹段。由此产生的伺服控制系统在软件或硬件上实现起来相对便宜，并且对参数变化，外部负载干扰以及控制MR读取头所固有的非线性非常不敏感。此外，它不需要常规线性控制器中常用的陷波滤波器来补偿机械共振。

IPRDB

热门服务

关于我们

友情链接

联系方式