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For area-covering mobile robots working in the outdoor unstructured environment, a strategy of unmarked area boundary creation and identification is proposed. The designed localization system and the matching algorithm using the digital map serve the robot to navigate in the work area. The method of localization error-correction based on the environmental(More)
Based on the background of energy-saving, this paper analyzes the relevant ways of energy-saving of the crane. From four kinds of different speed control, it analyzes their mechanical properties, energy consuming and the influence on dynamic load factor. It gets that speed control by frequency variation has the least impact on grid and the smooth speed. At(More)
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