摘要：As the sampling rates of the inner loop and the outer loop of the target tracking control system are different,a typical digital multi-rate control system was *** the traditional single-rate design method was applied,the low sampling rate loop will seriously impact the dynamical characteristic of the *** analyzing and calculating the impact law of the low sampling rate loop to the bandwidth and the stability of the tracking system,a kind of multi-rate control system design method was *** to the different sampling rates of the inner loop and the outer loop,the multi-rate control strategy was constituted by a high sampling rate sub-controller and a low sampling rate *** two sub-controllers were designed separately and connected by means of the sampling rate *** low sampling rate controller determined the response rapidity of the system,while the high sampling rate controller applied additionally effective control outputs to the system during a sampling interval of the low sampling rate *** the introduced high and low sampling rates sub-controllers,the tracking control system can achieve the same performance as a single-rate controller with high sampling rate,yet it works under a much lower sampling *** simulation and experimental results show the effectiveness of the introduced multi-rate control design *** reduces the settling time by 5 times and the over shoot by 4 times compared with the PID control.

摘要：为了实现无人机地面综合检测系统虚实结合的模拟训练功能,在LabWindows/CVI软件开发环境下,设计了无人机地面综合检测模拟训练软件,实现了不同功能模块的模拟检测与多源数据的实时采集以及跨平台调用。重点探讨了软件为跨平台调用而使用的动态链接库技术和为多源数据实时采集而采用的异步定时器技术,并给出了相应的实现方案。通过实际应用,表明该软件性能稳定,人机界面逼真,操作流程符合实际,完全满足教学训练需求。

摘要：介绍了一类使用速率陀螺为测量元件的光电平台稳定回路的构成,分析了速率稳定回路中影响输出角速度的三个因素,重点就干扰力矩对平台稳定性的影响进行了分析。针对静态力矩刚度的要求,提出了采用一种新的高阶超前滞后校正的校正方法。理论上分析若采用滞后超前校正,而不考虑静态刚度要求,必然得到稳定回路不能抵抗常值干扰力矩的结论。为了对比分析,本文给出了两种校正方法的校正结果,并运用Simulink进行了速率稳定回路抵抗常值干扰力矩的仿真实验。仿真结果验证了理论分析的正确性。

摘要：提高导航精度对于飞行器的设计具有重要意义。发展较早的组合姿态传感器很多,但是随着时间的推移,它们逐渐显露出一些难以克服的缺陷。地磁导航作为一种自主导航方式,在各个领域具有巨大应用潜力。本研究针对地磁辅助导航总体情况,对地磁导航中三轴磁强计的线上线下校正、组合姿态估计等关键技术的发展现状进行系统分析,探讨现有地磁信息辅助导航方法的不足和局限性,并指出未来进一步发展的方向。

摘要：目的设计和开发惠州卫生职业技术学院VR医院,探讨将VR技术引入卫生职业院校的可行性。方法根据教学需要,结合授课内容,设计和开发惠州卫生职业技术学院VR医院,让在校师生进行开放式体验,对完成体验的师生进行网络问卷调查,并应用相关软件进行数据处理与结果分析。结果 94.29%(3 300人)的调查对象对VR技术应用在教学上表示十分期待,非常乐于把握新的学习机会;94.29%(3 300人)的调查对象认为在卫生职业院校设立VR医院十分有必要;选择开放更多的科室以供参观及展示更多最新的医疗设备的调查对象占96.57%(3 380人)。结论将VR技术引入卫生职业院校广受好评,能够将学习与仿真体验相结合,让学生在感受VR技术的同时了解相关的专业知识;能够将枯燥乏味的课本知识变得充满趣味,让学生在游戏问答等体验中检测自己对该知识点的掌握程度;能够极大地提高学生对课程的兴趣和学习效率。