CONTROL SYSTEM DESIGN METHOD OF ELECTRIC-HYDRAULIC SHAKING TABLE

摘要

PURPOSE:To contrive the cost reduction of a computer by making a control circuit considering a dynamic characteristic determined from the weight and the like of a shaking table to determine the size of order, that can be lowered, of the control circuit so as to process a state variable with small influence on input and output as constant. CONSTITUTION:The output of a displacement sensor 10 attached to a shaking table 8 is converted into a digital signal with the use of an A/D converter 11 and the deviation between shaking table displacement converted into the digital signal and a signal generating means 2 is found with the use of a subtract means 2. The deviation is input into a controller 3 to find control input, which is input into another A/D converter 12 to convert into an analog signal to amplify an electric power with the use of a servo amplifier 4 so as to drive a servo valve 6. As the result, a hydraulic cylinder 7 is driven to change the displacement of the shaking table 8 to control the position of the shaking table 8 so that the displacement of the shaking table 8 agrees with that of the means 1. Thereby the cost of a computer can be reduced.