大尺寸精密测量技术及其应用

大尺寸精密测量技术应用问题是我国当前制造领域研究的热点问题.为了正确、高效应用大尺寸精密测量技术,首先对多种先进数字化测量系统进行分析对比,介绍了测量原理、特点及精度.其次,揭示了大尺寸精密测量与装配过程集成的内涵,以测量模型为核心实现多个环节的数据与过程集成.再次,提出了多数字化测量系统集成与数据融合基本架构,构建大尺寸数字化测量场.然后,给出了测量辅助装配中的核心算法及其与数据、过程间的关系,实现数据在装配过程中的传递.另外,为保证数字化检测技术应用,提出基于模型的检测规划与质量保证的基本架构.最后,研究了面向任务的测量不确定分析方案,总结不确定评估方法.     

Design and analysis of a hypersonic inlet with an integrated bump/forebody

Numerical simulations and experiments showed that bump inlet had a remarkable effect on boundary layer diversion of supersonic flow.However, the design and analysis of bump in hypersonic flow was still few.In this paper, the mechanism of a supersonic bump inlet is introduced to the design of hypersonic forebody.A hypersonic inlet with an integrated bump/forebody is obtained by the Method Of Characteristics(MOC) based on a chin inlet.Numerical simulations show that the modified inlet achieves diversion of low-speed flow.Besides, the integrated bump/-forebody is also beneficial to inlet start.During the starting process, the shape of the separation zone is rebuilt by the modified forebody surface which makes spillage much easier.This new design leads to a reduction of the self-start Mach number by 0.95.     

基于PI控制的直流电机调速控制系统的研制

为解决直流电机速度控制问题,采用增量式PI控制方法,设计了无刷直流电机速度控制器。对模拟调节器进行了离散化处理,每隔10ms用编码器测速一次,并进行适当的软件滤波,用计算出速度差作为控制量,用离散的差分方程代替连续的微分方程,用软件实现了PI控制算法。搭建了基于STM32的实验平台,给出了P和I参数整定方法,并通过大量实验得到了合适的P和I的系数,验证了该增量式PI控制方法的正确性。研究结果表明:该PI控制算法能够实现对速度的恒定控制,响应速度快、抗干扰能力强。为PID控制提供了实验的方法和步骤。     

利用VB设计动态模拟MCS51中断系统的仿真平台

用VB编程软件设计——仿真单片机8051中断系统的响应过程，采用动态教学方法，实验演示和动手相结合，使教学变得活灵活现，栩栩如生。     

Adaptive recognition and correction of baseline shifts from collocated GPS and accelerometer using two phases Kalman filter

The real-time recognition and precise correction of baseline shifts in strong-motion records is a critical issue for GPS and accelerometer combined processing. This paper proposes a method to adaptively recognize and correct baseline shifts in strong-motion records by utilizing GPS measurements using two phases Kalman filter. By defining four kinds of learning statistics and criteria, the time series of estimated baseline shifts can be divided into four time intervals: initialization, static, transient and permanent. During the time interval in which the transient baseline shift is recognized, the dynamic noise of the Kalman filter system and the length of the baseline shifts estimation window are adaptively adjusted to yield a robust integration solution. The validations from an experimental and real datasets show that acceleration baseline shifts can be precisely recognized and corrected, thus, the combined system adaptively adjusted the estimation strategy to get a more robust solution.     

测量船工况智能设计策略

针对以往海上测控方案中测量船工况设计存在的不足及后续测控工作的需要，以测量船工作弧段要求及历史数据为前提，以天线增益、航线保障等多个约束条件为设计要素，结合设计流水线、知识表达、模糊综合评估、遗传算法等多种设计方法，提出了一种智能化的测量船工况设计策略。     

注重学练结合提高培养质量—关于高职高专第二课堂学练结合的研究与实践

高职高专第二课堂学练结合是在校学生实践教学的重要环节，通过对第二课堂学练结合的作用、方法、实施的途径及结果进行的研究与实践，学练结合，不仅是理论与实践相结合的一种方式，也是激发学生学习兴趣的一种方法，更是提高学生技能增长、拓展知识层面的有效手段。     

Aerodynamic configuration integration design of hypersonic cruise aircraft with inward-turning inlets

In this work,a novel airframe/propulsion integration design method of the wing-body configuration for hypersonic cruise aircraft is proposed,where the configuration is integrated with inward-turning inlets.With the help of this method,the major design concern of balancing the aerodynamic performance against the requirements for efficient propulsion can be well addressed.A novel geometric parametrically modelling method based on a combination of patched class and shape transition (CST) and COONs surface is proposed to represent the configuration,especially a complex configuration with an irregular inlet lip shape.The modelling method enlarges the design space of components on the premise of guaranteeing the configuration integrity via special constraints imposed on the interface across adjacent surfaces.A basic flow inside a cone shaped by a dual-inflection-point generatrix is optimized to generate the inward-turning inlet with improvements of both compression efficiency and flow uniformity.The performance improvement mechanism of this basic flow is the compression velocity variation induced by the variation of the generatrix slope along the flow path.At the design point,numerical simulation results show that the lift-to-drag ratio of the configuration is as high as 5.2 and the inlet works well with a high level of compression efficiency and flow uniformity.The design result also has a good performance on off-design conditions.The achievement of all the design targets turns out that the integration design method proposed in this paper is efficient and practical.     

导弹控制系统集成框架技术研究

研究了集成框架技术的发展情况 ,提出了基于计算机、CAD和网络技术的导弹控制系统集成框架系统的设计方案和实现技术     

高校学生管理法治化探析

高校学生管理工作能否纳入法治化的轨道,关键在于理顺学校与学生的法律关系。本文认为两者之间的关系是一种行政合同关系,在此基础上论证了法治化的实质及法治化面临的问题