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µÚ1Õ  ¸ÅÂÛchapter 1  introduction  1.1  µçÒº±ÈÀý¼¼ÊõµÄ·¢Õ¹¸Å¿ö(overview of the development of electro-hydraulic proportional technology£©  1.2  µçÒº±ÈÀý¿ØÖƵĸÅÄî(concept of electro-hydraulic proportional control)   1.3  µçÒº±ÈÀý¿ØÖÆϵͳµÄ¹¤×÷Ô­Àí¼°×é³É(operating principle of electro-hydraulic proportional control system and its constitution£©    1.3.1  ¹¤×÷Ô­Àí(operating principle)      1.3.2  µçÒº±ÈÀýϵͳµÄ×é³É(composition of the electro-hydraulic proportional system£©  1.4  µçÒº±ÈÀý¿ØÖÆϵͳµÄ·ÖÀà(classification of electro.hydraulic proportional control system£©µÚ2Õ  ±ÈÀýµç´ÅÌúchapter 2  the proportional electromagnet  2.1  µç-»úеת»»Ôª¼þµÄ×÷Óü°ÐÎʽ(function and form of electro-mechanical conversion component£©    2.1.1  µçÒ»»úеת»»Ôª¼þµÄÐÎʽ(form of the electro¡ªmechanical conversion component£©    2.1.2  µçÒ»»úеת»»Ôª¼þµÄÒªÇó(demands of electric machinery conversion component£©    2.1.3  ±ÈÀýµç´ÅÌú¸ÅÊö(summary of the proportional electromagnet)  2.2  µç´ÅÌúµÄ½á¹¹Ó빤×÷Ô­Àí(structure and working principle of electromagnet£©    2.2.1  ÆÕͨÂÝÏß¹ÜÐ͵ç´ÅÌú(ordinary solenoid electromagnet)    2.2.2  µ¥Ïò±ÈÀýµç´ÅÌú(one¡ªway proportional electromagnet)  2.3  ±ÈÀýµç´ÅÌúµÄÌØÐÔ(characteristics of proportional electromagnet)    2.3.1  µç´ÅÌúµÄÎüÁ¦ÌØÐÔ(attracting characteristic of proportional electromagnet£©    2.3.2  µç´ÅÌúµÄ¸ºÔØÌØÐÔ(load characteristic of electromagnet)    2.4  ±ÈÀýµç´ÅÌúµÄ·ÖÀàÓëÓ¦ÓÃ(classification and application of the proportional electromagnet£©      2.4.1  Á¦¿ØÖÆÐͱÈÀýµç´ÅÌú(force control type)      2.4.2  Ðг̿ØÖÆÐͱÈÀýµç´ÅÌú(stroke control type)      2.4.3  λÖõ÷½ÚÐͱÈÀýµç´ÅÌú(position control type)    2.5  ±ÈÀýµç´ÅÌúµÄ³õ²½Éè¼Æ(preliminary design of proportional electromagnet£© µÚ3Õ  µçÒº±ÈÀý¿ØÖÆ·§chapter 3  electro-hydraulic proportional control valve  3.1  ¸ÅÊö(summary)  3.2  µçÒº±ÈÀýѹÁ¦¿ØÖÆ·§(electro¡ªhydraulic pmporional pressure control valve£©    3.2.1  ±ÈÀýÒçÁ÷·§(proportional relief valve)      3.2.2  ±ÈÀý¼õѹ·§(proportional pressure reducing valve)    3.3  µçÒº±ÈÀý·½Ïò¿ØÖÆ·§(electro¡ªhydraulic proportional directional control valve)    3.3.1  Ö±¶¯ÐͱÈÀý·½Ïò·§(direct operated proportional directional valve)    3.3.2  Ïȵ¼ÐͱÈÀý·½Ïò·§(pilot operated proportional directional valve£©    3.3.3  ÖÐλ»úÄÜÓ뷧о½á¹¹(structure and the center configuration of the valve spool£©  3.4  µçÒº±ÈÀýÁ÷Á¿¿ØÖÆ·§(electro¡ªhydraulic proportional flow control valve)    3.4.1  ÀûÓ÷½Ïò·§×÷Á÷Á¿¿ØÖÆ(directional valve used for flow control£©    3.4.2  ½ÚÁ÷·§(throttle valve)      3.4.3  ±ÈÀýµ÷ËÙ·§(proportional flow control valve)      3.4.4  ¶¨²îÒçÁ÷ÐͱÈÀýµ÷ËÙ·§(pressure compensated flow bypass control valve£©µÚ4Õ  µçÒº±ÈÀýÈÝ»ý¿ØÖƵÚ5Õ  µçÒº±ÈÀý¿ØÖÆ»ù±¾»Ø·µÚ6Õ  ±ÈÀý·Å´óÆ÷µÚ7Õ  µçÒº±ÈÀý¿ØÖÆϵͳµÄ·ÖÎöÓëÉè¼ÆµÚ8Õ  µçÒº±ÈÀý¿ØÖƼ¼ÊõµÄ¹¤³ÌÓ¦Óø½Â¼  Ó¢Óïרҵ´Ê»ã²Î¿¼ÎÄÏ×