四、电控系统结构和原理作为工程机械主导产品的液压挖掘机,在几十年的研制中逐渐完善,其工作装置、主要结构件和液压系统已基本定型,并逐步向机、电、液控制一体化方向发展,其最终目的是实现机器人化和全自动运转,这将是挖掘机技术的又一次飞跃。由于挖掘机控制方式不断变革,使其由简单的杠杆操纵发展到液压操纵、气压操纵、电气操纵、液压伺服 Fourth, the structure and principle of electronic control system As the leading product of construction machinery hydraulic excavator, gradually developed in the development of several decades, the working device, the main structural components and hydraulic system has been basically stereotypes and gradually to the machine, electricity, liquid Control the direction of the development of integration, its ultimate goal is to achieve robotic and fully automatic operation, which will be another leap in excavator technology. Due to the continuous change of excavator control mode, it has been developed from simple lever manipulation to hydraulic control, pneumatic control, electric control, hydraulic servo