论文部分内容阅读
目前市场上的全自动家电,例如全自动洗衣机、电脑控制空调等,其实都是程序控制、开环控制的。全自动洗衣机表面上操作者只要接通电源开关,机器就能自动地完成洗涤、漂洗、放水、脱干的全过程,直至洗衣动作完成。但是仔细研究后人们将会发现机器的自动程序是一成不变的,每一个动作的运行时间是事先设定的。若规定洗涤5分钟,则不论洗涤效果如何,总是固定在5分钟时停止。若规定放水2分钟,也不论缸内水是否放完,到达2分钟后立即停止放水。机器不是根据前一动作的效果来判断下一步应选择何种动作,而是由操作者事前设定的,这就要求操作者有丰富的经验,才能使机器的工作处于最佳状态。从控制工
Currently on the market fully automatic appliances, such as automatic washing machines, computer-controlled air conditioning, in fact, are program control, open-loop control. Fully automatic washing machine surface as long as the operator connected to the power switch, the machine can automatically complete the washing, rinsing, water, drying the whole process until the laundry action is completed. However, after careful study, people will find that the automatic procedure of the machine is immutable, and the running time of each action is set in advance. If the provisions of washing 5 minutes, regardless of washing effect, always fixed at 5 minutes to stop. If the provisions of the water for 2 minutes, no matter whether the end of the cylinder water is completely discharged, after 2 minutes to stop the release of water. The machine is not based on the effect of the previous action to determine the next step should choose what kind of action, but by the operator in advance set, which requires the operator has extensive experience in order to make the machine work in the best condition. From the control workers