Design and Microprocessor-Based Implementation of Digital Frequency Selective Filters for Application in Terrain Roughness Identification

摘要

The design and implementation of microprocessor-based frequency selective filters for possible use in an on-board terrain roughness identification scheme are investigated. In the design aspect of the investigation, a systematic digital filter design procedure is developed. The effectiveness of the procedure is illustrated by several digital filter design examples. In the implementation aspect, a digital signal processing firmware (hardware and software) based on the Motorola 6802 microprocessor is developed. The microprocessor realization of the exemplary digital filters are carried out. Actual experimental results are recorded and compared to their theoretical simulations. The capability of the firmware which includes the computational speed and numerical accuracies will be shown to be adequate for the present purpose. (Author)