-外文翻译--控制移动液压起重机-其他专业.doc

翻译部分 英文原文 CONTROL OF MOBILE HYDRAULIC CRANES Marc E. MüNZER Aalborg University Institute of Energy Technology, Pontoppidanstr?de 101 DK-9220 Aalborg, Denmark The goal of the thesis described in this paper is to improve the control of mobile hydraulic cranes. The thesis is split into five parts: a requirements analysis, an analysis of the current systems and their problems, an analysis of different possibilities for system topologies, development of a new control system for the near future based on electro-hydraulic separate meter in / separate meter out valves, and finally an analysis of more advanced and complex solutions which can be applied in the more distant future. The work of the thesis will be done in coop-eration with industry so the thesis will have more of an industrial focus than a purely theoretical focus. Key words: Mobile Hydraulic Cranes, Control Strategies, Separate Meter-in/Separate Meter-out. 1 INTRODUCTION The goal of the thesis described in this paper is to improve the control of mobile hydraulic cranes. A mobile hydraulic crane can be thought of as a large flexible mechanical structure which is moved by some sort of control system. The control system takes its input from a human operator and translates this command into the motion of actuators which move the mechanical structure. The definition of this control system is purposely left vague in order not to impose any con-straints on its design. The control system consists of actuators which move the mechanical structure, a means of controlling the actuators, a means of supplying power to the actuators,and a way of accepting inputs from the operator. It is this control system which is the target of this thesis. The goal is to analyze the requirements made on the control system and present guidelines for the design of new control systems. The thesis will be split into five parts: 1.Analysis of the requirements of the control system, from the perspective of the opera-tor, the mechanical system,