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For humanoid robot applications in nuclear radiation environments, not only the electronic and mechanical parts, but also the servo system in robots could be damaged by large dose of radiation. In this paper we study the radiation induced degradation to the brushless DC (BLDC) motor in the robot servo systems and analyze how its performance changes due to radiation induced demagnetization. The radiation...
DC Motor controller is the most important issue in many applications. There are trade-off between the performance and the final cost. Most of the proposed controllers in the territory of artificial intelligence have complicated computations that make them inapplicable. In this paper particle swarm optimization is used for identification of the DC motor and then adaptive neuro-fuzzy inference system...
This paper presents a direct current controlled pwm method for control of four-switch, three phase BLDC motor. The main features of this converter are twofold: the first is the reduction of switches and freewheeling diode count, the second is the reduction of conduction losses. For effective utilization of the developed system, a novel direct current controlled pwm scheme is designed and implemented...
In this paper, a new module structure of phase locked loop (PLL) speed controller is first proposed for permanent magnet brushless dc (PMBLDC) motor drives to achieve both fast response and high accuracy. The proposed standard module renders the controller design rather simple and straightforward. In addition, in order to reduce the drive cost, a phase current sensing scheme is adopted to properly...
Freescale MC9S12DG128 16-bit MCU (micro controller unit), as the core control unit, constitutes a intelligent car system with DC motors, steering gear and power source, as well as other circuits, The system has designed hardware and software, and realized the real-time observation for the car through PC. MCU uses PID algorithm to realize real-time control to the angle of steering gear and marching...
The working principle and constitution of electric power steering system (EPS) was introduced. The mathematic model was established and the state equation was listed. The influence factors and the corresponding solutions were analyzed. The close-loop control strategies of PID and PWM were adopted to control the target current of the motor for EPS. The simulations were made based on MATLAB/Simulink...
It has been a very common application of the DC-motor PWM speed regulation system based on the speed and current dual-closed-loop control strategy. To improve the control accuracy of current loop in speed regulation system and to further relax the dependence of the regulation system on the performance and the speed of the microcontroller, A new accurate PWM control method with variable pulse width...
This paper has proposed an electric locomotive in coal mine drawn by the parallel drive system of the switched reluctance dual motors. The principles of the Switched Reluctance motor drive operated at four quadrants with the fixed conducting angles PWM control strategy, the scheme of the symmetrical traction at I-quadrant and at Ill-quadrant, and the scheme of the symmetrical regenerative braking...
The research on DC servomotor control system for bomb-disposal robot is proposed in the paper, which is based on PID control and PWM output for the DC motor drive. The research designed PID control for 8 DC servomotors drive in the bomb-disposal robot, and the optimize PID parameters are determined by experiment. In the design the DC servomotor control system is an embedded system, where the encoder...
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