Microvibration Measurement for Space Optical Sensors
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Solution Overview
Problem
Conventional technologies fail to accurately measure and account for microvibrations affecting millisecond-level space optical sensors, leading to reduced measurement accuracy and stability in spacecraft operations.
Innovation Solution
A device comprising a light source, star simulator, air flotation vibration isolation platform, suspension system, zero stiffness system, six-degree-of-freedom microvibration simulator, and data acquisition system simulates a zero gravity and free boundary condition to measure microvibration effects on space pointing measurement apparatuses, allowing for precise data collection and system parameter determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measurement methods are used, then the measurement system is simple, but the measurement precision of microvibration effects is insufficient
Solution Approach 1:
The measurement system is divided into multiple independent functional modules: vibration isolation platform, suspension system, zero stiffness system, six-degree-of-freedom microvibration simulator, and data acquisition system. Each module performs a specific function and can be independently configured and calibrated, enabling high-precision microvibration measurement while maintaining system manageability through modular architecture.
Solution Approach 2:
The patent introduces intermediate systems between the optical sensor and the external environment: the suspension system and zero stiffness system act as intermediaries to isolate the optical sensor from gravitational and vibrational disturbances, while the six-degree-of-freedom microvibration simulator serves as an intermediary device to precisely apply and measure microvibration effects in a controlled manner.
2Reliability
If the optical sensor operates in microvibration environment, then the system can perform space pointing measurement, but the measurement accuracy decreases due to microvibration interference
Solution Approach 1:
The suspension system and zero stiffness system are designed to counteract gravitational and vibrational forces acting on the optical sensor. The air flotation vibration isolation platform provides active vibration cancellation, while the mechanical suspension system compensates for gravitational effects, creating a balanced force environment that maintains measurement stability during space pointing operations.
Solution Approach 2:
The system performs beforehand cushioning by pre-isolating the optical sensor through the suspension system and zero stiffness system before microvibration testing begins. The air flotation platform provides continuous vibration isolation during operation, and the six-degree-of-freedom simulator pre-compensates for expected microvibration effects through controlled testing scenarios.
3Measurement precision
If the system includes vibration isolation and microvibration simulation capabilities, then the measurement accuracy improves, but the device complexity increases
Solution Approach 1:
The test system is designed with multi-functionality to reduce overall complexity. The six-degree-of-freedom microvibration simulator serves multiple purposes: it simulates on-orbit microvibration conditions, provides controlled vibration input for testing, and enables determination of sensitive parameters. The suspension system and zero stiffness system simultaneously provide vibration isolation, gravitational compensation, and mechanical support, reducing the need for separate dedicated components.
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
The device effectively determines microvibration effects and sensitive parameters of millisecond-level space optical sensors, enhancing measurement accuracy and system stability by simulating on-orbit conditions and isolating external noise.
Implementation Method 1
air flotation vibration isolation platform
Implementation Method 2
six-degree-of-freedom microvibration simulator is configured to generate a microvibration signal corresponding to the control signal to simulate an on-orbit microvibration mechanical environment
Data Source
AI summary
A device and a method for determining a microvibration effect on a millisecond-level space optical sensor are provided. The device includes: a light source, a star simulator, an air flotation vibration isolation platform, a suspension system/air flotation system, a zero stiffness system, a supporting system, a six-degree-of-freedom microvibration simulator, a signal driving apparatus, and a data acquisition and processing system. In the device for determining a microvibration effect on a space pointing measurement apparatus, a free boundary condition and a zero gravity environment are simulated by using a suspension system and a zero stiffness system. A light source and a star simulator simulate a star at infinity. A six-degree-of-freedom microvibration simulator simulates an on-orbit microvibration mechanical environment which is used as an input of a test. Extremely high-precision sensors collect system response data.