DEVICE FOR SYNCHRONOUS MOVEMENT OF WORKING MEMBER HYDRAULIC CYLINDERS Russian patent published in 1998 - IPC

FIELD: mechanical engineering; control systems of spatial miltitie actuating mechanisms. SUBSTANCE: device has working member, hydraulic cylinders, working member position pickup, hydraulic amplifier, summing up element, regulators, threshold elements, control unit and selector switches in number equal to number of hydraulic cylinders, switches and memory elements, hydraulic cylinder rod length increment calculator unit, switch unit, summer unit, drive speed control device unit and movable platform levelling up setter. Working member is connected with working member position pickup and with hydraulic cylinders. Each hydraulic cylinder is connected with cylinder rod position pickup and is connected to output of corresponding hydraulic amplifier. Output of each summing up element is connected with corresponding regulator. Output of each rod position pickup is connected with first input of summing up element. Control input of summing up element is connected with control inputs of other switches. Memory element is connected with corresponding input of hydraulic cylinder rod length increment calculator unit. Setting input of calculator unit is connected with output of movable platform levelling up setter. First and second groups of outputs of hydraulic cylinder rod length increment calculator unit are connected with corresponding first and second groups of inputs of drive speed control device unit. Third and fourth groups of outputs of hydraulic cylinder rod length increment calculator unit are connected with corresponding third and fourth groups of inputs of drive speed control device unit whose fifth group of inputs is connected with outputs of switch unit. Control input of switch unit is connected with control inputs of each selector switch. First and second groups of drive speed control device unit are connected with corresponding groups of inputs of summer unit. Output of summer unit are connected with first inputs of corresponding selector switches connected by second inputs with outputs of control unit. Inputs of control unit are connected with outputs of working member position pickup. Outputs of selector switches are connected with second inputs of corresponding summing up elements. Emergency output of control unit is connected with control inputs of threshold elements placed between regulator and hydraulic amplifier in each channel. EFFECT: provision of simultaneously levelling up of movable platforms by several coordinates owing to synchronous proportional control of hydraulic cylinder length, increased reliability of process, reduced number of operators, provision of independent unloading. 4 dwg