Reaction Compensated Steerable Platform Trim Actuator Control
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Solution Overview
Problem
Existing reaction compensated steering mirrors suffer from residual or exported loads due to imperfections and out-of-phase movement between the mirror and reaction mass, leading to performance limitations in high-speed or frequency applications.
Innovation Solution
A reaction compensated steerable platform device is introduced, featuring a base, steerable platform, and reaction mass, with primary and trim actuators, and sensors for feedback control, allowing independent movement of the reaction mass to compensate for loads induced by the steerable platform, thereby reducing residual loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the reaction mass is driven directly against the mirror to passively compensate for mirror motion, then the exported reaction loads are minimized, but residual loads remain due to imperfections and out-of-phase movement
Solution Approach 1:
The patent employs feedback control by using sensors to detect the position of the steerable platform and the reaction mass, then using this information to actively adjust the reaction mass position through trim actuators. This closed-loop feedback system compensates for residual loads that remain after passive compensation, thereby reducing harmful exported loads while maintaining effective reaction compensation.
Solution Approach 2:
The system uses the reaction mass to compensate for its own movement-induced loads. The reaction mass is controlled to move in opposition to the steerable platform, allowing the system to self-correct for reaction loads generated during high-speed operation without requiring external intervention.
2Object-generated harmful factors
If the reaction mass moves independently to compensate for loads, then residual loads are reduced, but the device complexity increases due to additional actuators and sensors
Solution Approach 1:
The patent combines passive and active compensation systems into a unified reaction compensated steerable platform. The primary actuators provide passive compensation by directly coupling the reaction mass to the steerable platform, while trim actuators provide active compensation for residual loads. This merging of approaches allows the system to benefit from both simplicity and precision.
Solution Approach 2:
The compensation system is segmented into two functional parts: primary actuators that provide the main compensation force through direct coupling, and trim actuators that provide fine-adjustment compensation for residual loads. This segmentation allows each component to be optimized for its specific function while working together to reduce overall system complexity.
3Productivity
If high-speed operation is implemented to improve productivity, then the performance of steering mirrors is enhanced, but structural vibrations increase due to exported loads
Solution Approach 1:
The reaction mass is positioned and controlled to provide preliminary counter-action to the reaction loads generated by high-speed steerable platform operation. By anticipating and compensating for the direction and magnitude of reaction forces before they can cause structural vibrations, the system maintains stability during high-speed operation and improves overall productivity.
Data Source
AI summary
A reaction compensated steerable platform device is disclosed. The reaction compensated steerable platform device can include a base, a steerable platform movably coupled to the base, and a reaction mass movably coupled to the base. The reaction compensated steerable platform device can also include a primary actuator to cause movement of the steerable platform, and a trim actuator coupled to the reaction mass and the base. In addition, the reaction compensated steerable platform device can include a sensor configured to provide feedback for actuation of the trim actuator. The reaction mass can be configured to move by actuation independent of the trim actuator to compensate for a first portion of a load induced by the movement of the steerable platform. Actuation of the trim actuator can be controlled by the sensor, such that the reaction mass moves to compensate for a second portion of the load induced by the movement of the steerable platform.