VCA | PartQuest™ Explore

Motion Control with Voice Coil Actuator (VCA) - CPF Plant

Designer19

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11 years 11 months

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Member of the PartQuest Explore Development Team. Focused on modeling and simulation of analog, mixed-signal and multi-discipline systems covering a broad range of applications, including power electronics, controls and mechatronic systems.

Description

This example shows a VCA driven motion control loop that is acting through an equivalent model of a flexible mechanical structure. This model is shown on the right side of the schematic. It was calibrated to match a physical structure, based purely on its frequency response data and using the HyperLynx complex-pole fitting technology. The original mechanical model can be seen here:https://www.systemvision.com/design/spring-mass-structural-model-and-fitted-equivalentThe top net in this schematic represents the displacement of an ideal position sensor, which provides the actual target position feedback. The loop compensation was designed by using "AC" or frequency-domain analysis of the open loop transfer function. The results are shown in the Magnitude and Phase difference plots (sensor_displacement - feedback). The loop crossover is seen to be at approximately 100 Hz, and the phase margin is just over 44&nbsp;degrees. The corresponding time-domain step response is shown in the left-most waveform plot.You can see this same design and analysis using the original mechanical structural model for the "plant" here:https://www.systemvision.com/design/motion-control-voice-coil-actuator-vca-physical-plantYou can see a more detailed model of this system, that includes the Power Electronics section (i.e. a PWM controlled MOSFET H-Bridge used to drive the VCA), here:https://www.systemvision.com/design/motion-control-vca-pwm-drive

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ShakerPublic

Designer244467

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3 years

351

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Member of the PartQuest Explore development team.

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ShakerPrivate

Designer245134

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2 years 10 months

21

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I'm a member of the PartQuest Explore community.

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Copy of shaker table - on Thu, 10/09/2025 - 20:17

https://www.systemvision.com/design/spring-mass-structural-model-and-fitted-equivalent

The top net in this schematic represents the displacement of an ideal position sensor, which provides the actual target position feedback. The loop compensation was designed by using "AC" or frequency-domain analysis of the open loop transfer function. The results are shown in the Magnitude and Phase difference plots (sensor_displacement - feedback). The loop crossover is seen to be at approximately 100 Hz, and the phase margin is just over 44&nbsp;degrees. The corresponding time-domain step response is shown in the left-most waveform plot.

You can see this same design and analysis using the original mechanical structural model for the "plant" here:

https://www.systemvision.com/design/motion-control-voice-coil-actuator-vca-physical-plant

You can see a more detailed model of this system, that includes the Power Electronics section (i.e. a PWM controlled MOSFET H-Bridge used to drive the VCA), here:

https://www.systemvision.com/design/motion-control-vca-pwm-drive

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Copy of Motion Control with Voice Coil Actuator (VCA) - CPF Plant - on Thu, 02/27/2025 - 16:48

Designer261586

Member for

7 months 3 weeks

1

designs

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Welcome to the community!!

Description

This example shows a VCA driven motion control loop that is acting through an equivalent model of a flexible mechanical structure. This model is shown on the right side of the schematic. It was calibrated to match a physical structure, based purely on its frequency response data and using the HyperLynx complex-pole fitting technology. The original mechanical model can be seen here:

https://www.systemvision.com/design/spring-mass-structural-model-and-fitted-equivalent

The top net in this schematic represents the displacement of an ideal position sensor, which provides the actual target position feedback. The loop compensation was designed by using "AC" or frequency-domain analysis of the open loop transfer function. The results are shown in the Magnitude and Phase difference plots (sensor_displacement - feedback). The loop crossover is seen to be at approximately 100 Hz, and the phase margin is just over 44&nbsp;degrees. The corresponding time-domain step response is shown in the left-most waveform plot.

You can see this same design and analysis using the original mechanical structural model for the "plant" here:

https://www.systemvision.com/design/motion-control-voice-coil-actuator-vca-physical-plant

You can see a more detailed model of this system, that includes the Power Electronics section (i.e. a PWM controlled MOSFET H-Bridge used to drive the VCA), here:

https://www.systemvision.com/design/motion-control-vca-pwm-drive

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