中文摘要：

针对同时带有高频和低频干扰的信号设计了一种多级跟踪微分带通滤波器,给出了跟踪信号和微分信号的计算方法;以船用16PC2-6柴油机的实测瞬时转速为例进行了仿真研究;在建立柴油机系统动力学模型的基础上,利用瞬时转速的跟踪信号和微分信号实现了柴油机指示转矩的预测.仿真结果表明：采用该多级跟踪微分器可以获得瞬时转速的高品质跟踪信号和微分信号,适用于柴油机的转矩重构.

英文摘要：

Instantaneous torque is an important parameter for diagnosis and control of diesel engine.It is an effective method to reconstruct instantaneous torque based on instantaneous speed.A filter based on multiple tracking-differentiators was designed to process signals with both high frequent and low frequent noise,and the methodology was detailed given.Simulation study was carried out on the measured instantaneous speed of 16PC2-6 marine diesel engine.Following the dynamic model of propulsion system,indicated torque of diesel engine was estimated according to tracking and differentiator signals of instantaneous speed.The simulation results show that high quality tracking and differentiator signals of instantaneous speed can be gained by adopting proposed multiple tracking-differentiators,which is suitable for engine torque reconstruction.