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Automobile active suspension system with fuzzy control 总被引:3,自引:0,他引:3
A quarter-automobile active suspension model was proposed. High speed on/off solenoid valves were used as control valves and fuzzy control was chosen as control method.Based on force analyses of system parts, a mathematical model of the active suspension system was established and simplified by linearization method. Simula-tion study was conducted with Matlab and three scale coefficients of fuzzy controller (kc,kcc,ku) were acquired.And an experimental device was designed and produced. The results indicate that the active suspension system can a-chieve better vibration isolation performance than passive suspension system, the displacement amplitude of automo-bile body can be reduced to 55%. Fuzzy control is an effective control method for active suspension system. 相似文献
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吸扫式清扫车的工作参数对其清扫效率和清扫能力有决定作用。开展了清扫车工作参数与清扫性能试验,获取了清扫车速度、风机工作流量、盘刷转速和垃圾分布密度与清扫效率的作用规律,开展了清扫车工作参数正交变量试验。试验结果表明:工作参数对清扫效率的主次顺序为风机流量、清扫速度、盘刷转速、垃圾分布密度。进行了不同参数组合下吸扫式清扫车清扫效率试验研究。采用线性拟合的方法建立了清扫车清扫效率计算公式。采用求解极值的方法获取了清扫车的最大清扫效率。提出了清扫车工作参数匹配规律:当风机流量为760 m3/h,清扫速度为5.5 km/h,盘刷转速为120 r/min时,清扫车具有最佳工作性能。 相似文献
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A new sampling method of deepsea microplankton with function of in-situ concentrated sampling and gastight sampling was proposed. In-situ concentrated sampling technique was realized as follows: a microplankton membrane was used as filtration membrane, and a deepsea pump was used to pump seawater; the microplankton was captured and the density of microplankton was increased when seawater flow through the filtration membrane. Gastight sampling technique was realized as follows: a precharged accumulator was used as pressure compensator. During the process of lifting the sampler, the accumulator compensated the pressure drop continuously. The laboratory experimental results show that with in-situ concentrated sampling technique, in-situ concentrated sampling can be realized and the maximum concentration ratio reaches up to 500. With pressure compensation technique based on accumulator, gastight sampling can be realized. When sampling at 6 km and the precharge pressure of accumulator is 18 MPa, pressure drop of the sample is less than 2% compared with its original pressure. Deepsea experiment (at 1.9 km) results show that the sampler can realize in-situ concentrated sampling and gastight sampling. 相似文献
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GPS(Global Positioning System)全球定位系统尤其是实时动态(RTK)定位技术在公路测量中蕴含着巨大的技术潜力,本文概述了GPS的系统组成与其测量技术的原理,主分析了实时GPS测量技术的特点及其在公路测量中的应用。 相似文献
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