基于MEMS技术的多媒体空中鼠标

本文采用MEMS加速度传感技术,触控技术以及无线射频的多功能鼠标的电路设计方案,首先系统通过三轴陀螺仪和三轴加速度计的数据进行实时采集,将采集到的数据传送给STM32微控制器,用于计算鼠标的位移、角度、角速度等参数,并利用无线模块将数据发送到接收端,再通过USB协议发送到电脑端。针对现有空中无线鼠标通信距离、电池供电等问题的限制,本文采用通信距离更长的2.4GHZ无线电波,可循环充电利用的锂电池替代传统电池供电,并且利用USB设备通信,在接收端将大容量存储设备与鼠标设备整合复用,可实现二者之间的任意切换,提高了该鼠标系统适应实际应用环境的能力。     

A COLLOCATION METHOD FOR THE CONDUCTIVITY PROBLEM WITH DISCONTINUOUS COEFFICIENT

In this paper, a new collocation BEM for the Robin boundary value problem of the conductivity equation ▽(γ▽u) = 0 is discussed, where the 7 is a piecewise constant function. By the integral representation formula of the solution of the conductivity equation on the boundary and interface, the boundary integral equations are obtained. We discuss the properties of these integral equations and propose a collocation method for solving these boundary integral equations. Both the theoretical analysis and the error analysis are presented and a numerical example is given.     

Consensus of Multi-Agent Systems with Prestissimo Scale-Free Networks

In this paper, the relations of the network topology and the moving consensus of multi-agent systems are studied. A consensus-prestissimo scale-free network model with the static preferential-consensus attachment is presented on the rewired link of the regular network. The effects of the static preferential-consensus BA network on the algebraic connectivity of the topology graph are compared with the regular network. The robustness gain to delay is analyzed for variable network topology with the same scale. The time to reach the consensus is studied for the dynamic network with and without communication delays. By applying the computer simulations, it is validated that the speed of the convergence of multi-agent systems can be greatly improved in the preferential-consensus BA network model with different configuration.     

带有未知参数的多智能体系统的自适应分布控制

讨论带有未知参数的多智能体系统的一致性问题.假设网络拓扑中领航者是全局可达的,设计带有未知时滞的自适应分布控制,基于Lyapunov-Krasovskii泛函,得到关于线性矩阵不等式的一致性的充分性条件.该条件保证所有跟随者跟踪领航者的状态,实现状态和参数的一致性.最后仿真算例验证方法的有效性.     

分片常系数电导率问题的边界元配点法

用边界元方法讨论了具有分片常系数电导率方程Δ↓(γΔ↓u)=0的Dirichlet边值问题,由于方程的基本解无法显式写出,在应用通常边界元时存在很大的困难,基于这个电导率方程的解的积分表达式,导出一个在边界和交界面上的积分方程组,并讨论了这个方程组的性质,对于这个积分方程组,用配点法进行求解,且给出其误差分析．相应的数值例子证实了算法的有效性．应该指出的是本文所用的方法也适用于具有分片常系数椭圆方程的不同边界问题。     

具有通信时延的二阶多自主体系统的采样控制

主要针对固定拓扑网络下具有通信时延的多自主体离散系统,研究了二阶离散系统的一致采样控制.应用Z变换,分析了离散时间系统的动态运动方程.根据广义Nyquist判据,得到了二阶时延离散系统渐近收敛到一致的采样周期的上界.最后通过实例仿真,进一步验证了理论结果的正确性.