• Proceedings of the Korea Institute of Convergence Signal Processing
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• 2000.12a
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• pp.149-152
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• 2000

A scanner is an output device that scans documents, photographs, films etc, and convert them to digital data. Especially, a film scanner is used for scanning negative/positive films. In this paper, we design step motor control part, image sensor part, and Aか converter part which are components of the scanner and use DSP for fast signal processing. We also design the interface circuits using EPLD between these peripherals and DSP. The PC interface circuits between scanner and PC are designed by using parallel port to control and transfer the scanned data from scanner to PC. For 35mm film, we design hardwares which obtain high resolution more than 9 million pixels (horizontal resolution is 3835 and vertical resolution is 2592).

• The Transactions of the Korean Institute of Power Electronics
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• v.9 no.2
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• pp.158-162
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• 2004

The magnetic levitator is the device which can float a magnetic material at the midair by electromagnetic force and it's principle can be applied to the high speed magnetic bearing or magnetic levitation train. There are many difficulties to control, because the magnetic levitator is basically a nonlinear and unstable system. In this paper, this system is modeled assuming that it is a linear system nearby an operating point, and a proportional and derivative(PD) position controller is designed to carry out the variable position control. The performance of position control response is shown through simulation and experiment. A prototype magnetic levitator is constructed using PWM converter and DSP(Digital Signal Processor) based control board.

• Journal of Institute of Control, Robotics and Systems
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• v.10 no.10
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• pp.922-929
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• 2004

In this paper, we develop control hardware such as an FPGA based general purposed intelligent controller with a DSP board to solve nonlinear system control problems. PID control algorithms are implemented in an FPGA and neural network control algorithms are implemented in a BSP board. An FPGA was programmed with VHDL to achieve high performance and flexibility. The additional hardware such as an encoder counter and a PWM generator can be implemented in a single FPGA device. As a result, the noise and power dissipation problems can be minimized and the cost effectiveness can be achieved. To show the performance of the developed controller, it was tested fur nonlinear systems such as a robot hand and an inverted pendulum.

• Journal of Institute of Control, Robotics and Systems
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• v.1 no.1
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• pp.50-57
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• 1995

In this paper, the design and the implementation of the controller for an articulate robot, which is developed in our Automatic Control Laboratory, are mainly discussed. The controller reduces software computational load via distributed processing method using multiple CPU's, and simplifies structures by the time-division control with TMS320C31 DSP chip. The method of control is based on the fuzzy-compensated PID control with scale factor, which compensates for the influence of load variation resulting from the various postures of the robot with conventional PID scheme. The application of the proposed controller to the robot system with DC servo-motors shows some excellent control capabilities. Also, the response characteristics of system for the various trajectory commands verify the superiority of the controller.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.41 no.11
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• pp.1109-1117
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• 2017

In this work, a new control module and communication system associated with DSP are proposed to overcome the limitations of the contemporary prevailing PLC-based industrial equipment controller, and the performance of the proposed system was experimentally verified. In the light of this issue, a communication conversion scheme from RS-485 to Modbus, the dominant communication protocol used by PLC, was developed and shown to yield enhanced compatibility between devices. The proposed system allows for ~50％ cost reduction as well as downsizing of the industrial controllers. Furthermore, the design includes 24 V general digital I/O pins, which facilitate partial expansion of inputs and outputs. With Modbus communication implemented in DSP with the RS-485 interface, multi-to-multi communication may also be achieved.

• Journal of Advanced Marine Engineering and Technology
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• v.34 no.8
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• pp.1153-1158
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• 2010

In this paper, We make horizontal balancer (HB) and confirm a possibility of the technique that can be applied to ship through horizontal vibration reduction experiment. We use MATLAB as the simulator tool and experimental equipment consists of two induction motors shafts of which cam type unbalanced loads are fixed to, DSP and inverter circuit. Two induction motors perform roles as vibrator and balancer respectively, DSP control softwares such as speed, phase and vector control program. The simulation and experimental results show that the balancer characterizes good vibration reduction by phase control.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.6 no.6
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• pp.885-890
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• 2002

Turbo compressor needs high speed rotation of impeller in structure, high rated gearbox and conventional induction motor. This mechanical system increased the moment of inertia and mechanical friction loss. Resently the study of turbo compressor applied super high speed motor and drive, removing gearbox made its size small and mechanical friction loss minimum. In this study we tried to develope variable super high speed motor controller, compressor controller and MMI controller under one DSP based systems for 1500Hp, 70,000rpm direct drive Turbo compressor. It have to do unitification of each controller"s hardware and software. The result of study is applied to a 150Hp direct turbo compressor and makes it goods.oods.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.12 no.4
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• pp.75-80
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• 1998

In this paper, the real time characteristics analyzing system is proposed to analyze characteristics of inverter. The system is consisted of DSP unit and personal computer. Conventionally, power conversion system is designed by the load and the use. And control characteristics for the designed power conversion system is evaluated by the control input. In order to study of control methods, power conversion system is required for a study of control methods and observed system is required for a analyzing of the inverter. Inverter system is consisted to evaluate for proposed real time characteristics analyzing system. And induction motor is driven by control input that is manufactured by personal computer. Output of inverter and control characteristics is variously analyzed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2017.10a
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• pp.232-234
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• 2017

In this research, the BLDC motor 2 axis controller was designed using a dual core processor. The controller used TMS320F28377D which is TI's latest dual-core DSP, and the BLDC motor was selected with the position of resolver having high reliavility and the speed sensor built-in type motor.

• Proceedings of the KIPE Conference
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• 1998.07a
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• pp.357-360
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• 1998

본 논문에서는 TI(Texas Instruments)사의 DSP칩 TMS320F240을 이용한 벡터드라이브 설계를 한다. TMS320F240은 서보모터드 라이브에 적합하게 상품화 된 칩으로 산업용 로봇제어에 필요한 대부분의 주변회로를 포함하고 있다. 이를 이용해서 제어기를 구성하면 적은 비용으로 신뢰성 높은 제어기를 구성할 수 있다. 드라이브는 크게 제어회로부와 파워회로부로 나누어서 설계했으며, AC서보모터에 벡터제어로 실제적용을 했다.