원문정보
초록
영어
In order to detect the aircraft grid harmonic better, we design a kind of dual CPU harmonic detection device based on Digital Signal Processor (DSP) and ARM. Harmonic detection algorithm using the combination algorithm of FFT and wavelet transform. The measured signal through binary wavelet transform is separated into high frequency part and low frequency part, high frequency part by wavelet analysis can get the transient component, and low frequency part by FFT can get each steady-state harmonic parameters. By this method we can not only get the every steady-state harmonic component, but also determine the transient and sudden change signals. Design of ARM software adopts the embedded Real-Time Operating System (RTOS) of μC/OS-Ⅱ. This device makes full use of the powerful control ability of ARM and the powerful operation ability of DSP, and can achieve a precise measurement of the harmonic in aircraft grid.
목차
1. Introduction
2. Choice of Algorithm
3. Design of Hardware
3.1. Ac Conversion Module
3.2. Anti-Aliasing Filter Circuit
3.3. Synchronous Sampling and PLL Circuit
3.4. A/D Converter Circuit
3.5. Design of DSP Peripheral Circuit
3.6. DSP and ARM Data Communication Circuit
3.7. Keyboard and Display Circuit
3.8. Design of Communication with Host Computer Circuit
3.9. Design of LPC2294 Peripheral Circuit
4. Overall Design of Software
5. Porting μC/OS-Ⅱto LPC2294
5.1. μC/OS-Ⅱ Kernel
5.2. Required Conditions of Porting μC/OS-Ⅱ
5.3. Concrete steps of Porting
6. Extended RTOS Architecture of μC/OS-Ⅱ
7. Design of DSP Software
7.1. Data Collection Subroutine
7.2. Data Processing Subroutine
8. Conclusion
Acknowledgements
References