Oscillation Controller Dynamic Acceleration Torque Utilization
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Solution Overview
Problem
Current oscillation controllers for machine tools fix the acceleration of oscillating bodies, leading to inefficient torque utilization due to constant acceleration settings, which do not account for varying load torques caused by gravity, resulting in suboptimal machining performance.
Innovation Solution
An oscillation controller that dynamically adjusts acceleration by calculating specified maximum accelerations based on the direction and magnitude of load torque relative to the output torque and inertia, ensuring acceleration does not exceed calculated limits, thereby optimizing torque utilization across different angular positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed acceleration is set for the oscillating body, then the control system is simple, but the torque utilization is inefficient
Solution Approach 1:
The patent implements dynamic acceleration adjustment by calculating and applying different acceleration values based on the oscillating body's angular position. The control system transitions from a static fixed acceleration approach to a dynamic variable acceleration approach, where acceleration is continuously adjusted according to the load torque conditions at each angular position, thereby optimizing torque utilization efficiency without excessive complexity
Solution Approach 2:
The patent changes the acceleration parameter dynamically based on angular position and load torque conditions. By calculating the load torque at different angular positions and adjusting the acceleration parameter accordingly (using different acceleration values for different angular ranges), the system optimizes torque utilization. This parameter change approach allows the control system to adapt to varying gravitational effects throughout the oscillation cycle
2Device complexity
If a fixed acceleration is used, then the control calculation is simple, but the machining efficiency is reduced
Solution Approach 1:
The control calculation transitions from a simple fixed value approach to a dynamic calculation that considers angular position and load torque. The system calculates acceleration dynamically based on the relationship between angular position and gravitational load torque, implementing a more complex but efficient control strategy that improves machining efficiency by optimizing torque utilization throughout the oscillation cycle
Solution Approach 2:
The acceleration parameter is changed dynamically based on angular position ranges. The control calculation divides the oscillation cycle into different angular ranges and applies appropriate acceleration values for each range, optimizing the balance between control calculation complexity and machining efficiency by adapting acceleration to actual load conditions
3Loss of time
If maximum acceleration is applied at all angular positions, then the oscillation time is reduced, but the torque limits are exceeded at high load positions
Solution Approach 1:
The patent applies different acceleration values to different angular position ranges based on local load torque conditions. Instead of using a uniform maximum acceleration throughout the entire oscillation cycle, the system identifies angular ranges with high gravitational load torque and applies reduced acceleration in those specific regions, while maintaining higher acceleration in regions with lower load. This local quality approach ensures torque limit compliance while minimizing overall oscillation time
Solution Approach 2:
The acceleration is dynamically adjusted based on real-time angular position and load torque conditions. The control system continuously monitors the oscillating body's position and adjusts acceleration dynamically to prevent torque limits from being exceeded during high-load angular positions, while still achieving rapid acceleration during low-load positions, thereby optimizing the trade-off between oscillation time and torque limit compliance
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
This approach allows for more effective utilization of servo motor torque, reducing the time required for oscillation and improving machining efficiency by adapting acceleration to the changing load conditions.
Implementation Method 1
a load torque is exerted by action of gravity. The load torque varies, depending upon an angular position of the oscillating table about the axis of rotation.
Implementation Method 2
an acceleration of the oscillating body is calculated by subtracting a maximum load torque that hinders the oscillation of the oscillating body from a maximum output torque of a servo motor and further dividing a resultant value of the subtraction by inertia about the axis of rotation.
Data Source
AI summary
In oscillating an oscillating body, a control unit obtains a load torque due to the gravity acting on a drive motor at least at one angular position defined about an axis of rotation. The control unit calculates a specified maximum acceleration depending upon if the load torque Q is acting in a direction in which it hinders the acceleration or deceleration of the drive motor 15 or is acting in a direction in which it assists the acceleration or deceleration. An acceleration for the oscillating body is set so as not to be greater than the calculated specified maximum acceleration. The control unit adjusts the acceleration of the oscillating body depending upon the load torque of when the oscillating body 13 is accelerating or decelerating.