Implementation of VxWorks in autopilot for micro aerial vehicle based on PXA255 and FPGA

The overall hardware construction of autopilot within micro aerial vehicle is presented.The boot process of VxWorks real-time operating system as well as the conception and function of board-support package(BSP)is described.And the transplantation process of the VxWroks operating system into the hardware platform mentioned above is highlighted.It is shown from the final results that VxWorks has high stability and real-time performance,ensuring accurate flight control and a smooth flight of the micro aerial vehicle.     

大学英语课堂阶段性测试现状及改进

针对当前大学英语课堂阶段性测试中出现的问题进行了分析 ,继而提出如何正确看待和进行课堂阶段性测试 ,以促进大学英语教学。     

基于虚拟仪器的浮空飞行器阀门试验台测控软件设计

基于虚拟仪器技术采用LabVIEW开发了用于浮空飞行器阀门试验的通用测试与控制软件(以下简称"测控软件"),可实时采集与监控浮空飞行器的差压、绝压、温度、阀门开度、充气流量等参数,并能对阀门和试验设备实施多种控制,包括手动和自动控制阀门开启与关闭、控制多种风机启停工作等.经试验证明,所设计的测控软件能准确、可靠地实现浮空飞行器多种阀门工作参数采集、处理与有效控制.软件采取通用化、模块化、结构化的原则进行设计,提高了软件模块的独立性,充分发挥科研平台优势,将信号采集、处理、控制功能与试验对象有效集成,为浮空飞行器阀门试验提供了很好的通用测控平台,可服务于多种型号浮空飞行器阀门测试试验.