Papers by Keyword: AC Servo System

Abstract: Based on AC servo system of deep hole processing,a new kind of open CNC system is proposed by calling the dynamic link library under Windows operating system, which is made up of googol motion controller GE-400-PV,Panasonic MINAS driver and AC servo motor, has good man-machine interface, solved that the traditional methods is difficult to satisfy the practical requirements in the precision and efficiency of the deep hole processing, experiments show that, the control system can achieve the effect of precision processing, fully meet the requirements of mechanical technology in practical application.

Abstract: AC servo system has been widely used in many fields with its high performance and the fast development of intelligent control strategy. Targeted at the single-axis motion control applications in industrial automation, a kind of single-axis motion control system, based on FM354 controlled by S7-300 PLC, is designed. The system consists of three to the position, speed and current closed-loop control to achieve precise position control. The position loop is implemented by FM354. The speed loop and current loop are encapsulated in the servo driver. Through monitoring and comparing the dynamic performance with traditional systems, it can find out the bench runs smoothly and positioning accurately, perfectly meeting the technological and application requirements. It also can be applied to a variety of occasions and used for multi-axis extension.

Abstract: The nerve net self-adapting controller aiming at some AC servo system is designed on the basis of Mathematical Modeling. The controller includes two forward nerve nets with three layers. One is designed to identify the nerve net system named NNI and the other is to control the nerve net system named NNC.NNC use special learning algorithm to control system and at the same time improve its constringency pace through introducing new MFBP algorithm. The MFBP algorithm is programmed using MATLAB. The system’s Steady state error is no more than 0.2mil under the step response,speed response and accelerated response.According to the results of the simulation and experiments, the nerve net self-adapting controller has a high quality of static、dynamic performance and restrain the infection to system performance under hard circumstances like large inertia,variety load and huge change of torsion.

Abstract: A kind of comprehensive performance test-bed of automobile electric power steering system was designed. IPC was applied to the main control system. Testing software was developed based on Visual Basic. AC servo system was assembled to respectively simulate input torque and load torque, the manual input torque can also be realized by operating steering wheel. The motion control card MPC08 is used to control the motion of Servo motor. Test data is collected by using multi-function data collection card. The lifting gears were assembled to install input/output shaft servo motor and EPS. Test results show that the test-bed can verify the control strategies and accurately detect the assist characteristic of EPS.

Abstract: This paper introduces an ac servo control system that uses permanent magnet synchronous motor (PMSM) as object of control. It combines the feature of permanent magnet synchronous motor and servo-control, and designs the fuzzy self-adaptive of PID controller to achieve control of the position loop, speed loop and current loop. The simulation results of Matlab7.9 show that the controller has an excellent controlling effect.

Abstract: This paper carries research on the methods of wide-ranged speed regulation AC servo system based on the permanent magnetic synchronous motor. The permanent magnetic synchronous motor(PMSM) is a kind of motor with high speed and low rotational inertia, which needs overcoming nonsinusoidal magnetic field，cogging effect and the interference produced by chopper circuit when fulfilling wide-ranged speed regulation. In this paper, the authors analyze the phase current wave of PMSM, and put forth an appropriate type of digital filteration, which is proved true by computer simulation and experimental data.

Abstract: In order to monitor and control the parameters of AC servo driver, and also operate the condition of AC servo motor from upper-computer in real-time, a modularized architecture of software of upper-computer was presented. This software with well-designed human-computer interface and powerful function was developed by Visual C++ 6.0 and designed by the principle of object-oriented according to the requirements of users. An experimental platform was set up to test the software functions. The experimental results have proven that the developed software can realize the communication between the upper-computer and AC servo driver; it can also monitor and control parameters and including operation status of the AC servo motor. Meantime, the upper-computer software can read or write 149 sets of configuration parameters. These results indicate the developed software is convenient for users to control the AC servo driver.

Abstract: As a result of the non-linear characteristics and the uncertain disturbances in high-power AC servo system, it is difficult to construct an accurate mathematical model. In order to solve this problem, this article proposes a system identification method based on wavelet neural network. It makes full use of the advantages of the wavelet which combines neural network good time-frequency localization property and volatility of wavelet function and the nonlinear mapping capacity, self-learning and adaptive capacity of neural networks to solve the problem of non-unique RBF neural network approximation function expression. The simulation results show that the convergence rate, robustness and approximation accuracy of this method are better than the traditional neural network.

Abstract: AC servo system catches scholars and researchers’ more attentions. A fuzzy PID control strategy is proposed to the AC servo system. Using critical proportioning method to adjust the PID parameter, building two dimension fuzzy controllers to adjust the parameter and compensate the rotational speed. Analysis of simulation experiment of PID and incremental Fuzzy PID control, the result shows that the validity of the method.

Abstract: The sliding mode predictive controller based on an improved sliding mode reference trajectory is proposed for AC servo systems. On the basis of analysis of servo control systems, the position and velocity control strategy using the sliding mode predictive algorithm is developed. Combining the merits of the sliding mode and predictive control, the algorithm can improve the robustness and eliminate the chattering phenomenon. Moreover, according to the velocity profile during positioning, the sliding mode reference trajectory is designed in accordance with corresponding state motion curves to guarantee the desired dynamic characteristics. Finally, the application experiment is implemented and results demonstrate the feasibility and effectiveness of the proposed control scheme.