Papers by Keyword: DC Motor (DCM)

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Authors: Ming Liu, Philip Datseris, He Helen Huang
Abstract: In this paper, we designed a prototype of powered above-knee prosthesis. Compared with other prototypes available in the literature, our designed prosthetic leg employs a redundant actuator concept to overcome the challenge faced by the single-motor transmission systems. The redundant actuator also enables the prosthesis to be partially functional when the prosthesis loses power. Finally, in order to provide optimal control parameters for designed above-knee prosthesis to perform a smooth level-ground walking task, an inverse dynamic model based on Kane’s method is constructed.
Authors: Wen Cheng Wang
Abstract: The principles of PWM and Hall sensor have been introduced in this paper. To the defects of traditional methods, it proposed the designing strategy of DC motor speed control system based on single chip microcontroller with integrated circuits, and described the overall framework of the system. The system will generate PWM signals to control the motor accelerating, decelerating and turning, its operating parameters can be obtained through the measurement module and displayed on LCD. Experiment proved that the system has high stability, and it can meet the needs of DC motor speed regulation.
Authors: Il Ho Jung, Jong Hwi Seo, Hyung Suk Han, Tae Won Park, Joo Yong Kim
Authors: Zhen Yang Lu, Peng Fei Huang, Yong Gang Zhang, Shao Jun Bai
Abstract: A stable and even wire feed speed is a guarantee of good quality welding. A new wire feed system, without any speed-measuring equipment, has been designed. And the motor current of this system works in a discontinuous state. When the motor current is zero, it detects the induced electromotive force; acquires the motor speed according to the relationship between the induced electromotive force and the motor speed; calculates and compares with the given speed then changes the duty cycle of the voltage added on the motor by PWM technology, that control the motor speed. Then a stable and even wire feed speed can be achieved. Verified by testing resistance, the change rate of the wire feed speed is slightly, which proves that the new system has good mechanical properties and a stable speed. Besides, it runs reliably.
Authors: Marian Gaiceanu, Cristian Eni, Mihaita Coman
Abstract: In order to obtain an appropriate control for the electrical drive systems the real parameters values must be known accurately. Moreover, due to the parametric and structural uncertainty of the DC drive system, an adaptive control method is necessary. Therefore, a new model reference adaptive control (MRAC) for DC drives is proposed in this paper. MRAC ensures on-line adjustment of the control parameters with DC machine parameter variation. The adaptive control developed in this paper assures the asymptotic cancellation of the tracking error, fast and smooth responses of the DC drive without knowing a priory any information about the DC drive parameters. The simulation results show the validity of the proposed solution.
Authors: Vlad Mureşan, Mihail Abrudean
Abstract: In this paper, a solution for the automatic control of the driving mechanisms that load/unload billets in/from a rotary hearth furnace is proposed. This problem is approached because in the actual stage the control of the loading/unloading machines is made manually. The treated solution is based on using, for each machine, a direct-current motor (d.c. motor) supplied through a direct-current converter (d.c. converter) for the forward-backward moving of the two machines to/from the furnace. In this context, the tuning of the controller implemented in the converter is made in order to assure the imposed speed of the motors and implicitly of the machines, respectively an appropriate speed evolution of the motors in the period of their acceleration and deceleration to assure the machines correct positioning.
Authors: Bing Qiang Shan, Hai Sheng Yu, Zhao Bo Teng, Ning Zhu
Abstract: A novel state error port-controlled Hamiltonian (PCH) system method is presented for speed control the direct current (DC) separately excited motor. The unity power factor regulation of three phase pulse width modulated (PWM) rectifier is also implemented. Then, the state error PCH system control theory, the PCH model of the PWM rectifier and DC motor are proposed. Moreover, the control algorithm of the duty ratio switch function is presented for the PWM rectifier. Theoretical analysis and simulation results show that the controller has good speed tracking and unity power factor control performances.
Authors: Nemat Changizi, Mahbubeh Moghadas, Mohamad Reza Dastranj, Mohsen Farshad
Abstract: In this paper, an intelligent speed controller for DC motor is designed by combination of the fuzzy logic and genetic algorithms. First, the speed controller is designed according to fuzzy rules such that the DC drive is fundamentally robust. Then, to improve the DC drive performance, parameters of the fuzzy speed controller are optimized by using the genetic algorithm. Simulation works in MATLAB environment demonstrate that the genetic optimized fuzzy speed controller became very strong, gives very good results and possesses good robustness.
Authors: Wen Jiao Zai, Hua Zhang Wang
Abstract: The paper designs a high power DC motor closed-loop control system, mainly including design of H bridge drive circuit, speed detection circuit and signal conditioning circuit. In order to improve the performance of motor running, one proposes a fuzzy adaptive PID control algorithm. Firstly, one determines the degree of membership of the input values to defined fuzzy sets, then constructs the fuzzy rule table according to experience and experiments, finally, makes defuzzification for every parameter of PID controller, that is, Kp, Ki, Kd. Experiments show that both hardware implementation and software control algorithms are reliable, the running performance of the system is robust before or after adding load.
Authors: Dan Dan Zhu, Hong Wen Li
Abstract: Along with the development of microelectronic process, it is possible to integrate a big system in one chip. A new way to implement system on a chip is provided by the advent of FPGA. Based on Verilog HDL and the Actel Fusion AFS600 FPGA chip, the speed closed-loop control system of DC motor was designed by using options of combining the top-down thinking and the bottom-up method. PID control algorithm, encoder signal processing and PWM waveform generation etc were realized by the system. The results show that the system structure is simplified and the stability and reliability are improved. A solution of system on a chip is realized to some extent. It has extensive application value in engineering practice.
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