| Servo electric cylinder is the most common electric actuator, with more positioning points, high positioning accuracy, high transmission efficiency, energy saving and other characteristics, which is widely used in many fields. Currently, servo electric cylinder manufacturers or users will take its control performance, operating characteristics and operation energy consumption into account, thereby affecting the servo electric cylinder design, optimization, selection, or use. Electromechanical integration design of servo electric cylinder has a complex structure, more component parts and strong coupling characteristics, on the one hand it will lead to precise control more difficult, on the other hand will make its operation energy consumption analysis and testing becomes very difficult. Therefore, it is very necessary to analyze and research the motion control simulation model of servo electric cylinder, analyze and test for operation energy consumption of servo electric cylinder.Taking LEFS25AB-500B-R16 N model linear guide type servo electric cylinder produced by SMC corporation of Japan for research object, which uses a permanent magnet synchronous motor as a drive motor. The main research content of this paper includes simulation research of the servo electric cylinder and analyze and test for operation energy consumption of the servo electric cylinder.For simulation research of the servo electric cylinder, first of all, the mathematical model uses the vector control strategy of permanent magnet synchronous motor is analyzed. Secondly, design the three closed-loop of permanent magnet synchronous motor servo control system based on the id = 0 vector control, that is the current loop, velocity loop and position loop regulator respectively use PI, PI and pure proportional control, position feedforward compensation control is increased before the speed loop and current loop, in order to solve some problems, for examples there have location tracking lag, slow response, large overshoot phenomenons that often cann’t meet high tracking accuracy and high speed requirements tracking under the conditions of the permanent magnet synchronous motor servo control system use conventional PID control. Thirdly, the mechanical transmission section of the servo electric cylinder which is equivalent to a model which its stiffness, damping and inertia are considered, then can deduce its mathematical model and transfer function. Finally, integrate the mathematical model of the mechanical transmission section into the mathematical model of permanent magnet synchronous motor servo control system, then derived the mathematical model of servo electric cylinder, and simulate the mathematical model of servo electric cylinder in MATLAB / Simulink environment.For analysis and testing operation energy consumption for the servo electric cylinder, firstly, analyze the mechanism of electric servo-cylinder operation energy consumption and its composition according to the operating mechanism of the servo electric cylinder, theoretically derived mathematical model of the electric servo cylinder operation energy consumption. Secondly, design and build an operation energy consumption testing system for the servo electric cylinder based on LabVIEW according to the servo electric cylinder operating characteristics, test conditions and test requirements. Thirdly, carry out a comprehensive test experiments, including data acquisition, processing and analysis for the operation energy consumption of the servo electric cylinder under the conditions of different operating conditions. Finally, derived the theoretical mathematical model of the servo electric cylinder operation energy consumption according to the test results, and the model can be improved very vell, so that the error rate between predictive value which calculated by the theoretical mathematical model and measured value does not exceed 10%, then can provide theoretical basis and experimental data for design, optimization, selection, and using of the servo electric cylinder. |
PDF Full Text Request