A compound follow-up hydraulic actuator
A hydraulic actuation and composite technology, applied in the direction of fluid pressure actuators, servo motors, mechanical equipment, etc., can solve the problems affecting the dynamic accuracy and stability of the control system, excessive force of system response, and complex control system, etc., to achieve Broad market application prospects, high-precision position following and force synchronous loading control, and the effect of high control accuracy
Active Publication Date: 2019-10-11
XI AN JIAOTONG UNIV
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Problems solved by technology
The traditional loading test bench generally uses a single hydraulic servo actuator to perform displacement control and force loading respectively. Imbalance or overshoot, affecting the dynamic accuracy and stability of the control system
Method used
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Embodiment Construction
[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0020] see figure 1 and figure 2 , The present invention includes: servo cylinder piston rod 1, spring 2, spool 3, cylinder barrel 4, pressure servo valve 5, pressure sensor 6, pipeline 7 and loading cylinder piston rod 8. The left end earring of the servo cylinder piston rod 1 of the composite servo hydraulic actuator is fixed on the base, the cylinder barrel 4 and the loading cylinder piston rod 8 move, and the cylinder barrel 4 contains the servo cylinder and the loading cylinder. The right end of the servo cylinder piston rod 1 extends into the servo cylinder of the cylinder barrel 4, and the servo cylinder is divided into a servo cylinder rod chamber and a servo cylinder rodless chamber by the piston at the end of the servo cylinder piston rod 1 .
[0021] The piston rod 1 of the follower cylinder is connected to the left end of the valve core 3 thro...
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The invention relates to a combined type servo hydraulic actuator which comprises a servo cylinder piston rod with one end fixed and a cylinder barrel. The other end of the servo cylinder piston rod stretches into a servo cylinder of the cylinder barrel. An oil inlet channel and an oil return channel are formed in the servo cylinder piston rod. A piston of the servo cylinder piston rod is providedwith a damping hole for enabling a servo cylinder rod cavity to communicate with a servo cylinder rodless cavity. The servo cylinder piston rod is connected with one end of a valve element through areset device, the valve element and the piston of the servo cylinder piston rod form a mechanohydraulic servo valve, the other end of the valve element stretches into a loading cylinder of the cylinder barrel and is fixedly connected with a piston rod of the loading cylinder, the loading cylinder is provided with a pressure servo valve and a pressure sensor for measuring the pressure of a rodlesscavity of the loading cylinder, an oil inlet of the pressure servo valve is connected with a constant pressure oil inlet, a working oil port of the pressure servo valve is connected with the rodless cavity of the loading cylinder, the pressure sensor is connected with a controller, and the controller is connected with the pressure servo valve. Position following and force synchronous loading control can be rapidly achieved with high precision.
Description
technical field [0001] The invention belongs to the field of electromechanical hydraulic control, and in particular relates to a composite follow-up hydraulic actuator. Background technique [0002] The traditional hydraulic servo actuator is the actuator of the electro-hydraulic servo system. It has been widely used in the flight control system of aircraft to realize the position closed-loop control of the main control surfaces of ailerons, elevators and rudders. Existing hydraulic servo actuators only perform single position servo control, speed servo control or force servo control, and there is no report on hydraulic actuators that realize compound control. In the ground semi-physical test of the aircraft, a series of semi-physical simulation tests of the flight control and control system are required to simulate the timeliness and accuracy of the aerodynamic load in the air, which requires both displacement tracking and force loading at the same time. The traditional lo...
Claims
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IPC IPC(8): F15B9/09
Inventor 苏文斌韩旭朋胡桥曹明阳丁明杰李天石王朝晖
Owner XI AN JIAOTONG UNIV