An accuracy control of the position and velocity of an ultrasonic motor is a difficult problem due to the time variance and nonlinearity of its parameters 摘要由于超声马达的时变和非线性，使其速度与位置的高精度控制成为难题。
Due to the structure characteristics of the flexible manipulator , the vibration modes must be controlled to realize the high - precision tip position 由于柔性臂的结构特点，在进行其操作臂的控制研究时，必须考虑系统的振动特性才能达到末端的高精度控制。
This paper puts forward a new method for calculating anomaly area - the polygonous approximation method , and gives corresponding algorithm and precision - controlling technique 摘要提出一种新的异常面积计算方法多边形逼近法，并给出相应的算法和精度控制方法。
In order to realize high accuracy of real - time control of speed and torque , a kind of dtc speed controller based on sliding mode variable structure is designed 摘要为了实现交流感应电机的速度及转矩的实时高精度控制，设计了一种滑模变结构直接转矩速度控制器。
For its connatural limitation , the synchronous precision is not high , its use is limited , so that the problem of high synchronous precision is not solved 由于同步阀固有的缺陷，其同步精度不高，使用范围也受到限制，无法解决液压同步系统中高精度控制问题。
This system can complete the engine rotational speed and torque high accuracy control and the test , also engine temperature , pressure , oil consumption parameters survey 本系统能够完成发动机的转速、转矩的高精度控制与测试,以及发动机温度、压力、油耗等指标参数的测量。
Secondly . in order to realize the close - loop control to the cabin , three target points on the cabin must be got to solve the position and orientation of the cabin 为了实现对馈源舱的高精度控制，需要精确测量馈源舱上不共线的三个目标点的坐标，实时确定馈源舱的位置和姿态。
In the aspect of high - speed high - precision control system architecture , the hardware of the system has been selected , which can meet the demand of high - speed high - precision operation 在高速高精度控制系统体系结构方面,实现了控制系统各硬件部分的选取,满足了高速高精度作业的要求。
Control effect with high accuracy and stability on hydraulic shovel is achieved by feedback plus feedforward , nonlinear compensation , state feedback and gain scheduling on conditions 通过采用反馈加前馈控制、非线性补偿、状态反馈和根据状态对增益编排，获得了对液压正铲挖掘机的高精度控制效果和高稳定性。
This results in enormous and redundant data . two adaptive subdivision schemes , which can satisfy engineering requirements , are proposed in this thesis . one is based on shape precision control , another on surface fairness criterion 本文提出了两种符合要求的自适应细分模式：一是基于形状精度控制的自适应细分模式；二是基于表面光顺性要求的自适应细分模式。
