Hydraulic Gimbal Control System Settling
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Solution Overview
Problem
Hydraulic systems, such as those used in movie and theater applications, face issues with sudden movements during startup due to actuator settling, which can be dangerous and damaging, especially when people or sensitive equipment are present.
Innovation Solution
A system comprising at least one actuator, a sensor to detect orientation, and a controller that adjusts movement rates based on the difference between the current and desired orientations, moving at a slower rate when the discrepancy exceeds a pre-selected threshold to prevent sudden movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the system immediately moves the structure to the desired starting location after shutdown, then the system responds quickly to user commands, but sudden movements occur that can dislodge people or equipment and damage the system
Solution Approach 1:
The system dynamically adjusts the movement rate based on real-time conditions. When the structure is in the process of settling (position changing rapidly), the system automatically reduces the movement rate to prevent sudden movements. Once settling completes and position stabilizes, the system returns to normal responsive operation. This dynamic adaptation resolves the contradiction between quick response and preventing harmful sudden movements.
Solution Approach 2:
The system continuously monitors the position of the structure and detects when settling is occurring by measuring position changes over time. This feedback mechanism allows the system to identify the settling state and automatically adjust the movement rate accordingly, preventing sudden movements while maintaining normal operational responsiveness.
2Object-affected harmful factors
If the system waits for settling to complete before moving the structure, then sudden movements are prevented, but the system response time increases significantly
Solution Approach 1:
Rather than statically waiting for settling to complete before allowing any movement, the system dynamically adjusts the movement rate based on real-time settling detection. This allows the system to move the structure simultaneously with settling occurrence, but at a reduced rate that prevents sudden movements. This eliminates the time loss associated with waiting while still preventing harmful effects.
Solution Approach 2:
The system performs preliminary detection of settling conditions and proactively adjusts the movement rate before significant position discrepancies occur. By detecting settling in progress and preemptively reducing the movement rate, the system prevents sudden movements without requiring a complete wait for settling to finish, thus minimizing response time delay.
3Productivity
If the actuator moves the platform at a high rate, then the system is more productive and efficient, but the risk of damage to the system and articles on the platform increases
Solution Approach 1:
The system dynamically adjusts the movement rate based on real-time detection of settling conditions. During settling periods, the movement rate is automatically reduced to a safe level, preventing damage to the system and articles on the platform. When settling is not detected, the system operates at full speed for maximum productivity. This dynamic adjustment resolves the contradiction between efficiency and safety.
Data Source
AI summary
A control system for controlling the movement of a system such as a hydraulic servo controlled gimbal systems. The system includes a plurality of actuators and sensors that sense the position of the actuators. On start up, a control system determines the present orientation of the system and compared it to a user defined desired orientation. The system operates in a first mode on start up where the control system moves the actuators so that the system is moved form the present orientation to the desired orientation at a controlled rate. Once the desired orientation is reached, control is then passed to a user controlled device such as a joystick.