Servo Control Simulation Using Frequency and Time Response
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Solution Overview
Problem
Existing simulation methods for servo drivers in motor control systems can only adjust output filter parameters, failing to effectively adjust velocity and position controller parameters as they cannot confirm response characteristics beyond frequency responses.
Innovation Solution
A simulation device that computes frequency response functions, sets control parameters, and simulates time responses, allowing for simultaneous display of frequency and time response characteristics, enabling accurate adjustment of control parameters for motor and load device control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only frequency response simulation is performed, then the simulation device can display frequency response characteristics, but it cannot adjust velocity controller and position controller parameters
Solution Approach 1:
The simulation device is designed to perform multiple types of simulations (frequency response, time response, position control, velocity control) through a single integrated system. The simulation execution unit can switch between different simulation modes based on the command input, allowing users to adjust all control parameters (output filter, velocity controller, position controller) within one device rather than requiring separate specialized tools for each function.
Solution Approach 2:
The invention adds the time domain dimension to the traditional frequency domain simulation. By implementing both frequency response simulation (frequency domain) and time response simulation (time domain), the system provides comprehensive response characteristic information that enables adjustment of all control parameters, transforming the limited single-dimension simulation into a multi-dimensional analysis tool.
2Measurement precision
If actual operation of the load device is performed to adjust control parameters, then the control parameters can be set based on real response, but it requires repeated operation and measurement which is time-consuming
Solution Approach 1:
The simulation device creates a virtual copy of the servo driver and load device system. Instead of repeatedly operating the actual load device for parameter adjustment, users can perform multiple simulation trials with different control parameters on the copied system model. This allows accurate measurement of response characteristics without the time penalty of physical repeated operations.
Solution Approach 2:
The system performs preliminary simulation testing before actual device operation. By conducting time response and frequency response simulations in advance with various control parameter settings, users can identify optimal parameters virtually, thereby reducing or eliminating the need for time-consuming repeated actual operations and measurements of the physical load device.
3Ease of operation
If a physical model of the servo driver and load device is used for simulation, then control parameters can be adjusted without actual operation, but the model may not accurately reflect the individuality of the controlled object
Solution Approach 1:
The simulation execution unit incorporates feedback mechanisms that allow users to compare simulation results with actual system behavior. By enabling adjustment of control parameters (output filter, velocity controller, position controller) and observing the simulated response characteristics, users can iteratively refine the simulation model to better match the actual controlled object's individuality, thereby improving simulation accuracy while maintaining ease of operation.
Data Source
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AI summary
The present invention easily displays a frequency response and a time response to a user. The simulation device of the present invention comprises: a frequency response function computing part (53) computing a frequency response function according to a measured value of a response of a mechanical system (7), a time response outputting part (44) executing time response simulation, a frequency response outputting part (45) outputting a frequency response characteristic and a display control part (26) displaying the time response simulation and frequency response characteristic simultaneously or selectively.