输出反馈实现一类带不确定输入动态非线性系统的鲁棒几乎干扰解耦

研究一类带不确定输入动态非线性系统的输出反馈干扰抑制问题并基于观测器给出了输出反馈控制器 构造性的设计方法.所设计的控制器具有对可允许不确定动态的鲁棒性.不仅在L₂增益意义上抑制了干扰对输出 的影响,同时在ISS镇定意义上抑制了干扰对状态的影响.     

训练样本中扰动因素对BP学习算法影响的机理分析

从多层前向神经元网络的BP算法出发，通过计算机仿真发现含有噪声干扰的样本对BP网络的训练会产生不良的影响：①神经元网络的学习速度不易把握；②网络的学习过程不收敛或收敛值会偏移真实的期望输出。文中从本质上对产生这些影响的原因进行了分析，并且进一步揭示了能量函数的选取是使BP算法抗噪声能力差、鲁棒性不强的主要原因。     

采用自抗扰控制器的永磁直线电动机速度控制

设计了一种基于自抗扰控制原理的永磁直线电动机调速系统。将系统内部模型的不确定性与系统的外部扰动统一视为系统的未知干扰，通过扩张状态观测器来估计，根据估计状态设计非线性反馈控制律进行直接反馈线性化补偿，使直线电动机速度调节转化为解耦的线性系统的控制。仿真结果验证了该控制策略对状态的正确估计，以及对摩擦力和纹波推力扰动对速度精度影响抑制的可行性和鲁棒性。     

用 CPLD实现的高精度脉冲干扰抑制电路

提出了一种用CPLD实现的高精度新型脉冲干扰抑制电路。仿真分析和实际应用结果表明，该电路简单可靠，能有效地抑制数字信号中的脉冲干扰，明显提高电路的抗干扰能力，保证数据传输的可靠性，是一种有实用价值和重复利用潜力的电路。     

惯量和刚度对电动负载模拟器频宽影响的分析

给出了一种电动负载模拟器的系统结构，分析了系统惯量和轴系刚度与系统加载频宽之间的关系并进行了仿真实验研究。结果表明，对于电动负载模拟系统，在选择负载惯量和轴系刚度时，既要考虑使转矩伺服系统有较高的频响，又要考虑系统的稳定性和多余力矩的抑制效果。     

狭长区域内120m钢筋混凝土烟囱控制爆破拆除

在狭长区域内实施高烟囱定向爆破拆除,必须解决精确定向和落地冲击问题。本文结合峨眉铝业集团120m钢筋混凝土烟囱的爆破拆除,介绍了出灰口、后坐和偏心等几个重要问题的处理,提出了控制定向精度的方法和工艺手段。文中还介绍了爆破缺口参数的计算、震动安全距离的校核以及作者的体会。     

基于瞬时负荷统计特性检测电能质量扰动源

提出一种基于检测点产生的瞬时负荷统计特性快速确认扰动源的方法,展示了该原理在谐波、电压凹陷、电压膨胀、瞬间电压降落四种扰动,在MATLAB下的仿真和计算结果。结果表明在每种情况下此方法都可以对扰动源进行迅速准确的检测。同时还对每种情况计算电压与实际电压的偏离程度进行了分析,并求出了各种情况下的电压偏离方差。最后,根据扰动源产生原因对扰动源类型的识别进行了研究。     

A Comparative Study of Group Contingencies and Randomized Reinforcers to Reduce Disruptive Classroom Behavior.

The present investigation employed an alternating treatments design to (1) examine the efficacy of group contingencies in the reduction of disruptive behavior, and (2) compare the effects of independent, interdependent, and dependent group contingencies in the reduction of disruptive behavior in adolescent males identified with serious emotional disturbance. Disruptive classroom behavior has been associated with both decrement inacademic performance and increased risk for antisocial behavior. Although research findings have suggested that group contingencies are efficacious in reducing disruptive behavior, the data remain inconclusive regarding which group contingency (interdependent, dependent, and independent) is most effective. Results suggest that a clear superiority among the group contingencies was not evidenced. However, all were dramatically effective in the reduction of classroom disruptive behavior. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

机械电子设备中的电气干扰及抗干扰措施

从电源干扰、电磁干扰、接地错误三个方面介绍了机械电子设备中的电气干扰的来源及传输途径；从滤波、电气隔离、屏蔽、接地等四个方面介绍了具体的抗干扰措施。     

Bionic Attitude Transformation Combined with Closed Motion for a Free Floating Space Robot

In order to realize the small error attitude transformation of a free floating space robot,a new method of three degrees of freedom(DOF) attitude transformation was proposed for the space robot using a bionic joint.A general kinematic model of the space robot was established based on the law of linear and angular momentum conservation.A combinational joint model was established combined with bionic joint and closed motion.The attitude transformation of planar,two DOF and three DOF is analyzed and simulated by the model,and it is verified that the feasibility of attitude transformation in three DOF space.Finally,the specific scheme of disturbance elimination in attitude transformation is presented and simulation results are obtained.Therefore,the range of application field of the bionic joint model has been expanded.