一种海底取样钻机控制系统的设计

为了实现海底取样钻机的远程遥控控制,提出了以RS485作为远程数据通讯方式,来实现船上设备和海底钻机之间的控制命令和工作参数的传输;以单片机为控制核心,来实现振动器频率的调整和电磁阀的控制等。介绍了海底取样钻机控制系统的总体方案,硬件控制电路,以及相关软件的设计。     

新型电流型PWM整流器控制技术的研究

研究了一种新的具有PWM调制功能的电流型整流器（CSR）的拓扑结构。分析了该电路的工作原理,并对其两种控制技术：正弦脉宽调制（SPWM）技术与空间矢量脉宽调制（SVPWM）技术进行研究。这种拓扑结构结合了传统的三相相控整流器和直流Buck斩波器的优点,实现了单位功率因数。降低了电流谐波含量。     

基于MSP430的ELID磨削脉冲电源的设计

本文针对在线电解修整（ELID）磨削电源设计的要求,提出了一种基于某公司的16位单片机MSP430为主控制系统的磨削脉冲电源,详细的介绍了系统的总设计方案和软件设计。该电源利用MSP430的定时器功能控制产生高频脉冲信号,该脉冲信号的频率和占空比可分别在较大范围内调整,实现了脉冲电流的输出。     

A pressure output feedback control of turbo compressor surge with a thrust magnetic bearing actuator

This paper presents a pressure output feedback control of turbo compressor surge using tip clearance actuation with a thrust magnetic bearing actuator. First, static and dynamic compressor models were obtained for a commercial turbocharger, and the surge point was found through local stability analysis. Then, the effect of tip clearance on the compressor pressure rise was derived, and Lyapunov analysis was used to establish a limit of stability with tip clearance modulation. After that, a linear quadratic (LQ) state feedback control was designed considering the limit established by the Lyapunov analysis. In addition, an extended Kalman filter (EKF) was designed to estimate the mass flow rate from the measured compressor pressure. Finally, the pressure output feedback controller was built by combining the LQ state feedback control and EKF. Control simulation proved the effectiveness of the output feedback controller. This paper was recommended for publication in revised form by Associate Editor Dong Hwan Kim Dr. Ahn earned Ph.D. from Seoul National University in 2001. He was a research associate of University of Virginia. He is currently an assistant professor of department of mechanical engineering at Soongsil University and serving as an editor of international journal of rotating machinery. His research interests are rotordynamics, control and mechatronics. Mr. Park is a junior research engineer in Doosan infracore. He received his master from Seoul National University. His research area is on dynamics and control of rotating machinery. Dr. Sanadgol is an assistant Professor of Physics and Engineering at Sweet Briar College. She earned her PhD in Mechanical and Aerospace Engineering with a focus in controls from the University of Virginia in 2006. Her research interests are in controlling flow instabilities in compressors and application of nonlinear control theories to mechatronics systems. Dr. Park received his PhD degree from the Seoul National University, Korea in 2007. He is currently director of research institute at KMB&SENSOR company. His research interests include the precision machine design, rotor dynamics, and magnetic actuators. Dr. Han received the Dipl.-Ing. and Dr.-Ing. in mechanical engineering from University of Karsruhe, Germany in 1975 and 1979, respectively. In 1982, he joined the school of mechanical and aerospace engineering, Seoul National University as an assistant professor. He is currently an honorary professor of mechanical engineering. His research interests are in machine element design, magnetic bearing, lubrication engineering and Bio-MEMS devices. Dr. Maslen is a Professor of Mechanical and Aerospace Engineering at the University of Virginia. He earned his Bachelor of Science in 1980 from Cornell University and his doctorate from the University of Virginia in 1991. His research focuses on application of automatic controls to electromechanical systems with a concentration in magnetic bearings.     

基于电荷泵的IR2110全桥驱动电路研究

针对自举式IR2110全桥驱动电路无法提供低频及连续驱动的问题,提出了一种基于555定时器构成的电荷泵高端浮动自举电路。通过理论分析、Multisim软件仿真及现场试验,证实了该电荷泵电路能够提供连续稳定的高端浮动电源。给出了相关电路参数及其选择依据,很好地实现了某直流电机的PWM全桥低频驱动。     

次声及CSH-1型电容式次声接收器

在介绍次声有关概念的基础上，分析了次声接收器的构成原理，着重概述了根据该原理设计制造的CSH-1型电容式次声接收器。     

高速开关阀驱动的气动肌肉关节的滑模变结构跟踪控制

建立了PWM高速开关阀控制的气动人工肌肉单关节的4阶SISO动态数学模型，针对实现轨迹跟踪目标，采用输入输出线性化方法得到相对阶数为3的等价系统，该等价系统零动态渐近稳定。由于系统具有参数不确定性和未建模动态特性，采用了带积分的滑模变结构控制。实验结果表明，采用基于等效降阶模型的鲁棒控制，当模型存在误差时，能在关节的整个运动范围内实现较高精度的轨迹跟踪，且对气源压力和负载变化等外加干扰具有良好的鲁棒性。     

电流比例控制器的研究和实现

在机床自动化的升级改造中,电流比例控制器是为实现自动化加工生产,用来实现与自动化加工工艺的主机通信、编译主机命令、控制机床电动机执行具体动作的转换接口。     

零电压转换PWM变换器的设计

针对硬开关变换器及一些带有辅助开关的软开关变换器的缺点，介绍一种新型PWM变换器的设计方法。它采用零电压转换技术，使变换器开关器件的损耗明显减小，实验结果验证了这一结论。     

基于ARM内核的嵌入式肿瘤热疗系统

采用基于ARM内核的嵌入式系统开发小型超声热疗仪是肿瘤热疗系统开发领域中应用嵌入式技术的一个全新尝试，实现了上、下位机一体化设计。嵌入式肿瘤热疗系统包括组织温度采集与转换系统、超声功率控制信号发生模块、存储管理系统、人机交互系统（包括液晶显示及键盘输入）以及其他基本功能模块。根据热疗实际需要对PID控制算法进行改进与优化，提高了治疗中肿瘤组织温度的控制品质。实验结果表明，系统设计可靠，满足临床肿瘤热疗要求。