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运用模糊控制和滑模控制方法分别对半主动悬架系统和防抱死制动系统进行控制,建立了半主动悬架和防抱死制动系统的联合仿真模型,同时建立协调控制器对制动系统和悬架系统进行协调控制,仿真结果表明车辆性能参数得到了有效改善。试验结果表明,车辆制动减速度增加15%,距离和制动时间分别得到13.86%和11.38%的减小,车身俯仰角和质心垂直振动加速度分别有18.1%和16.2%的减小,试验验证了仿真模型的正确性和协调控制策略的有效性。 相似文献
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An airship named "Zhiyuan-l" was designed/fabricated/flied as a technical demonstration for stratospheric airship during 2007--2009 by Shanghai Jiaotong University. The calculation method and procedure of aerodynamic parameters were introduced, and the optimized configuration of the hull and the aerodynamic layout were given in this paper. Wind tunnel tests with different configurations, different pitch angles and different yaw angles were performed to study the wind load characteristics of the rigid model of the airship "Zhiyuan-1" in the φ3.2 m wind tunnel at China Aerodynamics Research & Development Center. Also the numerical calculation about the test model was carried out to investigate the aerodynamic behavior. According to the results of wind test and numerical calculation, the excellent hull configuration of the airship "Zhiyuan-1" with lower drag characteristic was confirmed, which is based on optimism of the Michel transition law. And the phenomena of pressure coefficient distribution were discussed according to the results of wind tunnel test and numerical calculation at different flight attitudes. 相似文献
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基于MAN-ES船舶主机参数,自主开发了船舶废气高压SCR系统,对系统设计原理、组成、流程及关键设备进行阐述。搭建了全尺寸高压SCR试验台架,对其进行力学分析及校核,并通过模拟仿真及振动试验测试手段,验证系统结构可靠性。结果表明,系统设计可满足主机排气相关作用力的影响;SCR运行时,会增加主机振动响应,尤其是主机在25%负荷下,其测试位置处的振动响应达最大值25.77 mm/s,增幅约为30%;主机在100%负荷下,反应器横向振动响应达最大值11.47 mm/s;尿素增加对系统振动影响可忽略。 相似文献
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从充分发挥内审员作用的角度分析了当前各单位在资质管理、人员能力、内部审核有效性等方面的薄弱环节,以落实集团公司质量管理规定等质量管理规章制度为出发点,提出提升内审员能力、抓好内部审核闭环、推行内审员注册管理的具体措施。 相似文献