Servo Control Apparatus Online Adjustment State Display
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Solution Overview
Problem
Conventional servo control apparatuses lack the ability to display phase during online adjustments and fail to precisely measure original mechanical characteristics, leading to delays in handling abnormal operations.
Innovation Solution
A servo control apparatus with a speed command generator, torque command generator, speed detector, speed control loop, filter, sinusoidal disturbance input unit, frequency characteristics calculator, resonance frequency detector, gain adjuster, filter adjuster, sequence controller, and adjustment state display unit, which enables online automatic adjustment of speed control loop gain and filter, displaying the adjustment state and reasons for interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If online automatic adjustment is performed without display functionality, then adjustment automation is improved, but operator awareness of adjustment state deteriorates
Solution Approach 1:
The patent implements a display unit that provides real-time feedback to the operator about the automatic adjustment state, including current adjustment stage, detected resonance frequencies, and filter coefficients. This feedback mechanism resolves the contradiction by maintaining full automation while eliminating information loss through visual display of system state.
Solution Approach 2:
The patent introduces an intermediary display system that mediates between the automatic adjustment process and the operator. This intermediary provides structured information about the adjustment progress and system state without interfering with the automated control loop, thus preserving automation while improving operator awareness.
2Ease of operation
If external operation is allowed during online automatic adjustment, then operational flexibility is improved, but measurement precision deteriorates
Solution Approach 1:
The patent implements a monitoring mechanism that detects external operations before they can interfere with measurements. By preliminarily detecting operator input or abnormal operations during the adjustment process, the system can take preventive actions to maintain measurement precision while still allowing operational flexibility.
Solution Approach 2:
The display unit provides feedback about the current measurement state and detects when external operations occur. This feedback mechanism allows the system to maintain measurement precision by alerting operators to measurement-critical states while still permitting operational flexibility through controlled interaction.
3Device complexity
If adjustment state is not displayed, then device complexity is reduced, but abnormal operation handling time increases
Solution Approach 1:
The patent implements a feedback-based display system that provides real-time information about adjustment progress and system state. This feedback mechanism reduces abnormal operation handling time by immediately informing operators of the current state and any anomalies, while the display architecture is kept relatively simple to avoid excessive complexity.
Solution Approach 2:
The patent utilizes visual display elements including color-coded indicators to communicate adjustment state and abnormal conditions. This approach provides rich information feedback with relatively simple display hardware, reducing handling time without significantly increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables safer and more precise automatic adjustments of speed control loop gain and filter by displaying the adjustment state and reasons for interruptions, allowing for rapid recognition of abnormalities and improved handling of abnormal operations.
Implementation Method 1
a sinusoidal disturbance input unit (7) for performing a sinusoidal sweep on the speed control loop (4)
Implementation Method 2
a frequency characteristics calculator (8) for estimating the gain and phase of speed control loop input and output signals from the output of the speed control loop (4) when a sinusoidal disturbance is inputted to the speed control loop (4)
Implementation Method 3
a resonance frequency detector (9) for detecting a resonance frequency from frequency characteristics
Data Source
AI summary
A servo control apparatus according to the present invention includes a speed command generator; a torque command generator; a speed detector; a speed control loop; a speed control loop gain setting unit; at least one filter for filtering a specific band of a torque command value; a sinusoidal disturbance input unit for performing a sinusoidal sweep on the speed control loop; a frequency characteristics calculator for estimating the gain and phase of speed control loop input and output signals; a resonance frequency detector; a filter adjuster for adjusting the filter in accordance with a resonance frequency; a gain adjuster; a sequence controller for online and automatically performing the detection of the resonance frequency, the adjustment of the speed control loop gain, and the adjustment of the filter; and an adjustment state display unit. The adjustment state display unit displays a stage and progress in the adjustment by the sequence controller.