Stable platform servo control system

A technology of servo control system and stable platform, which is applied in the direction of using feedback control, aircraft parts, transportation and packaging, etc. It can solve the problems of large volume and weight, difficult to suppress mechanical resonance, etc., and achieve fast response and high speed stability , Improve the effect of control accuracy

Pending Publication Date: 2021-07-09
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the technical problems that the traditional motor servo control system cannot meet the precision requirements of the system, the mechanical resonance is difficult to suppress, and there is a large volume and weight. A stable platform servo control system is proposed, which has fast response speed, control High precision, small size and light weight

Method used

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Embodiment

[0070] 1) Control system circuit composition

[0071] In the stable platform servo control system of the present invention, the azimuth axis control component and the pitch axis control component are realized by a circuit board, and the circuit board mainly includes the following functional modules: DC / DC, DSP, FPGA, three-phase bridge, PWM drive circuit, current acquisition circuit, overcurrent protection circuit, AD conversion circuit, RS422 communication circuit, etc.

[0072] ①Power supply

[0073] The rated input voltage of the circuit is 28V, and the allowable input voltage range is 18~75V, which is used as the motor bus voltage. At the same time, the input voltage supplies power to the circuit board after DC / DC conversion.

[0074] The three-way output DC / DC of DATEL Company is selected, which can output three voltages of 5V, +15V and -15V at the same time. And small size, high power. The size is only 50.8mm×50.8mm×11.4mm, and the power is 20W.

[0075] Select TI's...

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Abstract

The invention provides a stable platform servo control system, and aims to solve the technical problems that a traditional motor servo control system cannot meet the control precision requirement of the system, mechanical resonance is difficult to restrain, and the size and the weight are large. The stable platform servo control systemincludes a DC / DC, an azimuth motor arranged on an azimuth shaft, an azimuth fiber-optic gyroscope, an azimuth encoder arranged on an output shaft of the azimuth motor, an azimuth shaft control assembly, a pitching motor arranged on a pitching shaft, a pitching fiber-optic gyroscope, a pitching encoder arranged on an output shaft of the pitching motor, and a pitching shaft control assembly. The control assembly comprises an FPGA, a DSP, a three-phase bridge, a PWM drive circuit, a current acquisition circuit, an AD conversion circuit and a communication circuit. The DSP comprises a position loop controller, a speed loop controller, a current loop controller, a digital wave trap and a PWM generator, and is used for realizing an SVPWM control algorithm or an SPWM control algorithm and a current, speed and position three-closed-loop control algorithm of an azimuth axis.

Description

technical field [0001] The invention relates to a control system of a photoelectric pod, in particular to a servo control system for a stable platform. Background technique [0002] At present, the airborne photoelectric pod system develops rapidly and is widely used in military and civilian fields. The stable platform control system is a key part of the photoelectric pod. As the equipment equipped with the imaging system, it is used to isolate the machine body from external environmental disturbances, and to ensure the clear imaging of the sensor while maintaining the stability of the visual axis. come higher. During the working process of the airborne optoelectronic stabilized platform, the model of the airborne optoelectronic stabilized platform cannot be obtained accurately, and the characteristics of the system itself are changed by the influence of the external environment. At the same time, the noise interference such as torque, sensor and actuator is also uncertain....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D3/20B64D47/08
CPCG05D3/20B64D47/08
Inventor 曹钰王海涛韩俊锋井锋谢梅林冯旭斌王磊
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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