In this paper, the analysis method of stochastic response of piled offshore platform excited by stationary filtered white noise is presented. With this method, the strong ground motion is considered as three direction...In this paper, the analysis method of stochastic response of piled offshore platform excited by stationary filtered white noise is presented. With this method, the strong ground motion is considered as three direction stationary filtered white noise process, the theoretic solutions of three special integration equations are derived with the residue theorem, and the expression of response nodal displacements and member forces of offshore platform excited by the stationary filtered white noise is put forward. The stochastic response of a piled offshore platform excited by the stationary filtered white noise, which is located 114.3 m in water depth, is computed. The results are compared with those obtained with the response spectrum analysis method and the stationary white noise model analysis method, and the corresponding conclusion is drawn.展开更多
抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤...抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤波器的工作原理,基于Python与Matlab联合编程的方式,设计了可交互的自动化平台。该平台可根据输入的CIC滤波器或半带滤波器的特性参数,自动设计多级CIC滤波器以及多级级联的半带滤波器RTL代码,增强了代码的可复用性,提升了设计效率。可自动设计2倍~128倍抽取的CIC滤波器以及2倍~16倍抽取的半带滤波器。该平台还特别添加了生成CIC滤波器与半带滤波器的多种幅频响应曲线的功能,可以更直观地体现所设计的滤波器的各项参数指标。展开更多
Aim To find an effective method to remove the registration error in multi-sensor systems. Methods A Kalman filtering technique was proposed to estimate and remove sensor bias and sensor fare tilt errors in multisenso...Aim To find an effective method to remove the registration error in multi-sensor systems. Methods A Kalman filtering technique was proposed to estimate and remove sensor bias and sensor fare tilt errors in multisensor systems with a moving platform. Results Simulation results are presented to demonstrate the performance of the approach. Conclusion The Kalman filter algorithm am detect registration errors and use this information to converge tracks from independent sensors. This is particularly important if the data from the sensors are to fused.展开更多
文摘In this paper, the analysis method of stochastic response of piled offshore platform excited by stationary filtered white noise is presented. With this method, the strong ground motion is considered as three direction stationary filtered white noise process, the theoretic solutions of three special integration equations are derived with the residue theorem, and the expression of response nodal displacements and member forces of offshore platform excited by the stationary filtered white noise is put forward. The stochastic response of a piled offshore platform excited by the stationary filtered white noise, which is located 114.3 m in water depth, is computed. The results are compared with those obtained with the response spectrum analysis method and the stationary white noise model analysis method, and the corresponding conclusion is drawn.
文摘抽取滤波器是数字下变频(Digital Down Converter,DDC)系统中的核心组成部分,一直是工程实践中研究的重点。CIC滤波器(Cascade Integrator Comb,CIC)以及半带滤波器是广泛用于实现抽取功能的两种滤波器。通过分析研究CIC滤波器与半带滤波器的工作原理,基于Python与Matlab联合编程的方式,设计了可交互的自动化平台。该平台可根据输入的CIC滤波器或半带滤波器的特性参数,自动设计多级CIC滤波器以及多级级联的半带滤波器RTL代码,增强了代码的可复用性,提升了设计效率。可自动设计2倍~128倍抽取的CIC滤波器以及2倍~16倍抽取的半带滤波器。该平台还特别添加了生成CIC滤波器与半带滤波器的多种幅频响应曲线的功能,可以更直观地体现所设计的滤波器的各项参数指标。
文摘Aim To find an effective method to remove the registration error in multi-sensor systems. Methods A Kalman filtering technique was proposed to estimate and remove sensor bias and sensor fare tilt errors in multisensor systems with a moving platform. Results Simulation results are presented to demonstrate the performance of the approach. Conclusion The Kalman filter algorithm am detect registration errors and use this information to converge tracks from independent sensors. This is particularly important if the data from the sensors are to fused.
