Satellite Payload Capacity Modulation for Peak-Demand Power
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Solution Overview
Problem
Satellite communication systems face challenges in managing capacity fluctuations due to uneven demand, leading to excess capacity during low demand periods and insufficient capacity during high demand periods, resulting in inefficiencies and reduced user experience.
Innovation Solution
Configuring satellite payloads to modulate capacity based on demand profiles, using a smaller power system and thermal management components to adjust electrical and thermal energy consumption and storage, allowing for flexible capacity adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If satellite capacity is configured to be constant to ensure sufficient service during high demand periods, then service reliability is improved, but capacity utilization deteriorates during low demand periods due to excess unused capacity
Solution Approach 1:
The patent implements dynamic capacity modulation by adjusting the operational state of satellite components based on real-time or predicted demand. The payload transitions between different capacity states (high, medium, low) according to demand profiles, allowing the system to adapt its resource allocation dynamically rather than maintaining a fixed constant capacity, thus resolving the contradiction between reliability and utilization efficiency
2Productivity
If satellite capacity is increased to meet peak demand, then service capability is improved, but power consumption and thermal generation worsen due to continuously operating at high capacity
Solution Approach 1:
The patent employs periodic modulation of satellite capacity aligned with predictable demand patterns (such as daily or weekly cycles). The payload operates at high capacity during peak demand periods and reduces to lower capacity during off-peak periods, creating a periodic operational pattern that matches service requirements while significantly reducing average power consumption and thermal generation compared to continuous high-capacity operation
3Productivity
If payload operates at high capacity continuously, then throughput is improved, but thermal management capability deteriorates when thermal generation exceeds dissipation rate
Solution Approach 1:
The patent dynamically adjusts payload operational capacity based on thermal conditions and demand requirements. When thermal generation approaches dissipation limits, the system modulates capacity downward to maintain safe operating temperatures, while still providing adequate service during lower demand periods. This dynamic thermal-aware capacity management resolves the contradiction between maintaining high throughput and managing thermal constraints
4Power
If power system is sized to support continuous high capacity operation, then power availability is improved, but system complexity and cost worsen due to oversized components
Solution Approach 1:
The patent implements dynamic power management where the power system operates at varying levels based on actual demand rather than continuously at maximum capacity. By modulating the payload capacity to match demand profiles, the system can use smaller, less complex power generation and storage components while still meeting peak power requirements through strategic timing of high-capacity operation, thus reducing overall system complexity and cost
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
Enhances capacity utilization by matching energy consumption to demand levels, preventing overheating and ensuring consistent service quality by optimizing energy use and thermal management.
Implementation Method 1
power for the satellite may be provided via a power generation component such as a solar array (e.g., one or more panels of photovoltaic cells)
Implementation Method 2
power for the satellite may be provided via a power generation component such as a solar array (e.g., one or more panels of photovoltaic cells) or a nuclear generator (e.g., radioisotope thermoelectric generator)
Implementation Method 3
the satellite may be configured with a thermal management component that stores excess thermal energy generated by the payload during periods of high demand
Data Source
AI summary
Methods, systems, and devices for satellite operations are described. A system for satellite communications may include a payload, a power system, and a thermal management component. The payload may be configured to provide a service with varying levels of capacity based on a demand profile. The payload may consume electrical energy at a peak rate when a level of demand indicated by the demand profile is above a threshold and at a lower, off-peak rate when a level of demand indicated by the demand profile is below a threshold. The peak rate may exceed a rate at which electrical energy is generated by the power system. The thermal management component may process excess thermal energy generated by the payload when the payload operates at the peak rate. Processing the excess thermal energy may include storing thermal energy while the payload operates at the peak rate.