Systems and methods for non-rigid load vibration control

Patent metadata

Field	Value
Publication number	US-11264929-B2
Application number	US-201916574606-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Sep 18, 2019
Publication date	Mar 1, 2022
Grant date	Mar 1, 2022

Abstract

A system includes a motor configured to be coupled to a non-rigid load and a control system disposed within, or communicatively coupled to, a drive system configured to control an operation of the motor. The control system includes a processor and a memory accessible by the processor. The memory stores instructions that, when executed by the processor, cause the processor to generate a smooth move input profile to control the operation of the motor based on inputs specifying a desired operation of the motor, apply a notch filter having a notch filter frequency to the smooth move input profile to produce a filtered smooth move input profile, and send a command to the drive system based on the filtered smooth move input profile, wherein the command is configured to adjust the operation of the motor.

First claim

The invention claimed is:

1. A system, comprising:
a motor configured to be coupled to a non-rigid load via a compliant linkage;
a control system disposed within, or communicatively coupled to, a drive system configured to control an operation of the motor, the control system comprising:
a processor; and
a memory accessible by the processor, the memory storing instructions that, when executed by the processor, cause the processor to:
generate a smooth move input profile to control the operation of the motor based on inputs specifying a desired operation of the motor, wherein a second derivative of the smooth move input profile is piece-wise continuous;
apply a notch filter to the smooth move input profile to produce a filtered smooth move input profile, wherein the notch filter has a notch filter frequency that is determined based on a resonant frequency of the non-rigid load; and
send a command to the drive system based on the filtered smooth move input profile, wherein the command is configured to adjust the operation of the motor.

2. The system of claim 1 , comprising a sensor configured to collect data corresponding to the non-rigid load during the operation of the motor, wherein the control system is configured to generate a supplemental input signal to adjust the operation of the motor based on the collected data.

3. The system of claim 2 , wherein supplemental input signal is conditioned by a proportional integral (PI) process block.

4. The system of claim 3 , wherein the control system comprises a user interface element configured to control an adjustable integral gain of the supplemental input signal.

5. The system of claim 1 , wherein the smooth move input profile comprises a cubic function, a 5th order polynomial function, a 7th order polynomial function, a sinusoidal function, a modified sine function, a sine squared function, or a combination thereof.

6. The system of claim 1 , wherein the notch filter is defined by a notch width, a notch depth, and a gain.

7. A non-transitory, tangible, computer readable medium comprising instructions that, when executed by a processor, causes the processor to:
receive inputs specifying a desired operation of a motor, wherein the motor is communicatively coupled to a drive system and configured to be coupled to a non-rigid load, wherein the non-rigid load comprises a mass suspended by a cable, a vessel carrying fluid, or a combination thereof;
generate a smooth move input profile to control the operation of the motor based on the inputs specifying the desired operation of the motor, wherein a second derivative of the smooth move input profile is piece-wise continuous;
apply a notch filter to the smooth move input profile to produce a filtered smooth move input profile, wherein the notch filter has a notch filter frequency that is determined based on a resonant frequency of the non-rigid load; and
send a command to the drive system based on the filtered smooth move input profile, wherein the command is configured to adjust the operation of the motor.

8. The computer readable medium of claim 7 , wherein the processor is configured to be communicatively coupled to a sensor configured to collect data corresponding to the non-rigid load during actuation of the motor, wherein the processor is configured to generate a supplemental input signal to adjust the operation of the motor based on the collected data.

9. The computer readable medium of claim 8 , wherein supplemental input signal is conditioned by a proportional integral (PI) process block.

10. The computer readable medium of claim 7 , wherein the smooth move input profile comprises a cubic function, a 5th order polynomial function, a 7th order polynomial function, a sinusoidal function, a modified sine function, a sine squared function, or a combination thereof.

11. The computer readable medium of claim 7 , wherein the notch filter is defined by an adjustable notch width, an adjustable notch depth, and an adjustable gain.

12. A method, comprising:
generating, via a control system, a smooth move input profile to control actuation of a motor coupled to a non-rigid load via a compliant linkage based on inputs specifying a desired operation of the motor, wherein a second derivative of the smooth move input profile is piece-wise continuous;
applying, via the control system, a notch filter to the smooth move input profile to produce a filtered smooth move input profile, wherein the notch filter has a notch filter frequency that is determined based on a resonant frequency of the non-rigid load; and
sending, via the control system, a command to a drive system based on the filtered smooth move input profile, wherein the command is configured to adjust the operation of the motor.

13. The method of claim 12 , comprising:
collecting, via a sensor, data corresponding to the non-rigid load during actuation of the motor;
generating, via the control system, a supplemental input signal to adjust the operation of the motor based on the collected data; and
sending, via the control system, the supplemental input signal to the drive system.

14. The method of claim 12 , wherein the notch filter is defined by an adjustable notch width, an adjustable notch depth, and an adjustable gain.

Assignees

• Rockwell Automation Tech Inc

Inventors

• Miklosovic Robert J
• Fast Brian

Classifications

• G05B2219/41232

  Notch filter · CPC title

• H02P23/0004

  Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control · CPC title

• G05B2219/41222

  Modified command filtering · CPC title

• H02P23/04 Primary

  specially adapted for damping motor oscillations, e.g. for reducing hunting · CPC title

• B66C13/063

  electrical · CPC title