{'fraction_non_alphanumeric': 0.022636484687083888, 'fraction_numerical': 0.013315579227696404, 'mean_word_length': 4.740458015267175, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Control System of Two-phase Brushless DC Gyro Motor Based on DSP

The research of the influence of gyro motor speed stability on the north-seeking result is studied in order to improve the gyro north-finding precision. The paper introduces a two-phase brushless DC gyro motor control system based on TMS320LF2407A. First it expounds the two-phase brushless DC motor's working principle. Then through the design of the hardware and software system, the two-phase brushless DC gyro motor control is realized. The experimental results show that: the system can drive the brushless DC gyro motor starting, braking and smoothly running. The precision of the steady speed is less than 10-4 and the characteristics of the system satisfy the gyroscope demand.