An overview,

"Nakedness JXZK - 2 d integration principle of computer control experiment platform" is combined with the current development trend of electronic technology experiment, experiment box maintenance for aluminum alloy, easy to go bad, process the general characteristics, research and development of new electronic technology experiment box, can complete automatic control principle, using the virtual instrument is the demands of the development of electronic technology, the modular design, the new design at the same time the regulated power supply, all digital design, greatly improves the reliability and efficiency.

Technology configuration

* 1. The experimental platform is designed with a full range of molds and has a beautiful appearance. It is made of high-quality PVC and black engineering plastics. Leave virtual oscilloscope, virtual signal source interface, power interface, I/O interface and other common interfaces. Each bin can hold four modules at once.

2. The module is made of 2mm thick printed circuit board, with the graphic symbols of components and corresponding wiring printed on the front and the printed circuit printed on the back, and the related components are welded. Easy maintenance. High quality galvanized pole can be used to complete circuit power supply. Provide common test units.

3. The experiment box shall be equipped with the voltage regulator required for the experiment. The voltage regulator shall be equipped with no less than ±5V/ 0.5a, ±12V/ 0.5a and the constant voltage regulation range of 0 ~ 18V/ 0.75a; Constant current current adjustment range 0 ~ 200mA/18V), all digital design, with communication interface and the whole network data monitoring function, can be upgraded to provide LABVIEW and mobile phone APP software and other cloud tools, with short circuit protection and automatic recovery.

4. Provide experimental instruction and other teaching resources. The wires have different colors.

5. External fitting: temperature detection and control model:

Temperature control object with 24 v dc voltage as the heating power, mainly by the heater, temperature sensor, temperature transmitting circuit, drive circuit, fan and so on several parts, including heating tube adopts transparent organic glass, can clearly see the internal structure of the heater, through analog unit, A/D, D/A conversion into A standard control signal; The single closed-loop control experiment of temperature can be completed. Students can modify the control parameters and program by themselves to achieve different control effects. The temperature signal is indicated by the output of dc voltage signal. A dc voltmeter is provided for monitoring the input signal of the heating circuit and the temperature signal of the temperature detection.

6. External fitting: temperature detection and control model:

(2) real model of dc motor closed-loop control:

Ac motor mainly consists of dc motor, rotary plate, F/V conversion circuit, drive circuit and other parts, which can be used for digital PID closed-loop control of motor speed.

7. External: stepper motor drive control model:

The stepper motor is used as the object of the model. The dial indicator is marked on the panel, and the rotation Angle of the stepper motor is indicated by the pointer. It can run the stepper motor in single step and continuous operation, and can run the stepper motor in four-phase four-beat, four-phase eight-beat operation mode.

Iii. Experimental contents

(1) computer control technology

1. Convert A/D to D/A

2. Digital filter

1. Research on (S) discretization method

2. Research on digital PID control algorithm

3. Cascade control algorithm research

4. Research on decoupling control algorithm

5. Full state feedback control of linear discrete systems

6. Single neuron controller

7. Two-dimensional fuzzy controller

8. Quadratic state regulator

(1) computer technology control system experiment

1. Dc motor closed-loop speed control (real object)

2. Stepper motor control (physical object)

3. Temperature closed-loop PID control (real object)

1. Dynamic correction of sampling control system