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Electrical control device for DC motor type force actuator

A technology of force actuators and electronic control devices, which is applied in the program control, electrical program control, instruments and other directions in the sequence/logic controller, can solve the problems of complex driving circuit, poor stability, singleness, etc., to improve the control accuracy and Stability, nonlinear and external disturbance suppression, and the effect of reducing complexity

Active Publication Date: 2013-06-05
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem that the driving circuit is complex when the existing stepping motor is used as a force actuator, a single force closed-loop control is adopted in the algorithm realization, an external position sensor needs to be configured when a DC motor is used, and the output force has low precision and poor stability. An electric control device for a DC motor type force actuator is provided

Method used

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  • Electrical control device for DC motor type force actuator
  • Electrical control device for DC motor type force actuator

Examples

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 Description of this embodiment, a control method of a DC motor type force actuator, the method is implemented by the following steps:

[0015] Step 1: the control system 16 obtains the force setting value Fr;

[0016] Step 2: Send the force feedback value Fb output by the force acquisition unit 8 into the control system 16;

[0017] Step 3: Subtract the force set value Fr obtained in step 1 and the force feedback value Fb obtained in step 2 to obtain the force error value ef, and use the force controller 1 in the control system 16 to perform a calculation on the force error value ef Correction, and the correction result is used as the force speed setting value Vr of the force speed controller 2 in the control system 16;

[0018] Step 4: The control system 16 subtracts the force feedback value Fb obtained in step 2 from the force feedback value Fb1 obtained through the delay unit 7, and then divides the subtracted resu...

specific Embodiment approach 2

[0023] Specific implementation mode two: combination figure 2 Describe this embodiment, the electronic control device used to realize the control method of a DC motor type force actuator in this embodiment, including a communication unit 20, a power module 21, a control system 16, a digital-to-analog converter 18, and a sensor interface 15 , DC motor interface 19, digital interface 17; It also includes force acquisition unit 8, power amplifier 4, current controller 3 and current sampling unit 6;

[0024] Described control system 16 input ends are respectively connected with the output end of communication unit 20, the output end of digital interface 17, the input end of power amplifier 4 and the output end of force collection unit 8; Control system 16 reads force through communication unit 20 respectively. The set value is operated by reading the force feedback value through the force acquisition unit 8, and the limit state information of the output force is read through the ...

specific Embodiment approach 3

[0033] Specific implementation mode three: combination figure 1 and figure 2 Describe this specific implementation mode, this implementation mode is the embodiment of specific implementation mode one:

[0034] The control system 16 described in this embodiment is a DSP;

[0035] The specific implementation process is as follows: 1. DSP reads the force setting value Fr sent by the host computer through the serial communication converter 12; 2. DSP collects the force feedback value Fb through the force acquisition unit 8 with a fixed sampling period of 1 ms; 3. The DSP makes a difference between the force setting value Fr and the force feedback value Fb, and sends the force error value ef into the force controller 1 for correction, and the correction result is used as the force speed setting value Vr of the force speed controller 2; The force feedback value Fb obtained by the delay unit 7 is subtracted from the force feedback value Fb1 obtained by the delay unit 7, and the di...

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Abstract

An electrical control device for a DC motor type force actuator relates to astronomical telescope active optical systems, aims to solve the problems that the conventional stepping motor serving as the force actuator has a complicated drive circuit, adopts single force close-loop control in the algorithm realization, and an external position transducer is needed to be equipped if a DC motor is adopted, the precision of power output is low and the stability is poor, and adopts the control method that a force set value Fr and a force feedback value Fb are obtained through a control system, and are subjected to the subtraction to obtain a force error value ef, and the ef is rectified to get the force velocity set value Vr; the Fb and the force feedback value Fb1 are subjected to the subtraction through the control system to get the difference value divided by a delay time T and further get the force velocity feedback value Vb; the Vr and the Vb are subjected to the subtraction to get the difference value ev, the rectified ev serves as the current setting value Ir; the Ir and the Ib are subjected to the subtraction to obtain the difference value current ei; and the ei is rectified through a current controller and to be outputted. The electrical control device provided by the invention is suitable for the control field of force actuators.

Description

[0001] Filing date of the original application: 2010.04.22 [0002] The application number of the original application: 201010152279.7 [0003] Title of invention of the original application: A control method and electric control device for a DC motor type force actuator technical field [0004] The invention relates to an active optical system of an astronomical telescope, in particular to a control system of a force actuator. Background technique [0005] As an important part of the active optical system of a large astronomical telescope, the force actuator changes the shape of the primary mirror in real time by applying pressure or tension to correct the mirror deformation caused by factors such as gravity, temperature and wind. In order to achieve the required surface shape accuracy, the accuracy of the force applied by each force actuator to the mirror surface is required to reach the millinewton level (mN), and the required output force has high stability within a few...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/02G02B26/08G05B19/04
Inventor 王帅张斌李洪文阴玉梅张丽敏
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI