基于单点虚拟振动功率的发动机转速测量方法.pdfVIP

学兔兔 第35卷 第3期 仪 器 仪 表 学 报 V01．35 No．3 2014年3月 Chinese Joumal of Scientific Instrument Mar．2014 基于单点虚拟振动功率的发动机转速测量方法术 徐 健，张耕实，李本银 (哈尔滨T程大学自动化学院 哈尔滨 150001) 摘 要：钊 对目前普遍采用的发动机转速测量方法欠缺操作简便性和普遍适用性的问题，提出一种基于发动机附体(包括外壳 及其延伸部分)振动特性的转速测量方法。采用振动传感器将发动机附体振动信号转换为电压信号，由该电压信号计算振动 传感器安装点所对应的单点虚拟振动功率，进而根据以先马命实验数据拟合的转速一单点虚拟振动功率对应关系即可实现转速测 量。为了滤除环境干扰和转速动态变化导致的高频噪声，引入了PD指数因子白适应惯性滤波。开展了某游艇发动机转速测 量的实艇实验，最大测量误差小于3％，结果表明所提 的发动机转速测量方法合理有效、实施简单，对稳态及动态转速的测量 均适用，测量精度满足发动机转速日常监测要求。 关键词：发动机转速；振动传感器；单点虚拟振动功率；数据拟合 中图分类号：TP212．9 TH86 文献标识码：A 国家标准学科分类代码：460．40 Engine revolution speed measurement method based on single-point virtual vibration power Xu Jian，Zhang Gengshi，Li Benyin (College of Automation，Harbin Engineering University，Harbin 150001，China) Abstract：Aiming at the problem that present commonly used methods for engine revolution speed measurement lack convenient operability and general applicability，a method for engine revolution speed measurement based on vibra- tion performance of the appendages(including the enclosure and its extensions)is presented．A vibration sensor is adopted to convert the vibration signal of the appendage to voltage signal；and from the voltage signal，the single- point virtual vibration power(SPVVP)and the spwp is calculated corresponding to the position where the vibration sensor is fixed．After the SPVVP is measured，utilizing the previously fitted corresponding relation between the revo— lution speed and the SPVVP，the revolution speed could be obtained．To filter the high-frequency noise caused by the environment disturbance and the dynamical changing of the revolution