Process Synchronization Control for Redundant Flight Channels
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Solution Overview
Problem
Existing process synchronization control systems for redundant devices, such as those used in flight control systems, face challenges in achieving high reliability and accuracy due to complex correction controls for operation clock cycles, which can deteriorate the reliability of flight control calculations.
Innovation Solution
A process synchronization control system that includes input and output units, a synchronization process unit, a process execution timer, and a waiting time measurement timer, which synchronizes process execution timers across devices by waiting for a synchronization signal and resetting timers, allowing for accurate and reliable synchronization with a simple configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If correction control for operation clock cycle is performed to synchronize processes, then synchronization accuracy is improved, but device complexity and calculation reliability deteriorate
Solution Approach 1:
The patent extracts the synchronization function from complex clock cycle correction control. Instead of continuously correcting operation clock cycles through complex calculations, the invention introduces a dedicated synchronization signal transmission mechanism that operates independently. Each device transmits synchronization signals at predetermined timing, and other devices adjust their process execution timing based on receiving these signals, thereby achieving synchronization without complex correction control.
Solution Approach 2:
The patent introduces a synchronization signal as an intermediary mechanism between devices. Rather than devices directly correcting each other's clock cycles through complex calculations, they use the synchronization signal as a mediator to coordinate timing. The synchronization signal carries timing information that devices use to align their process execution, simplifying the synchronization mechanism while maintaining accuracy.
2Measurement precision
If correction control for operation clock cycle is performed to synchronize processes, then synchronization accuracy is improved, but calculation reliability deteriorates
Solution Approach 1:
The patent separates the synchronization function from the main process calculation logic. By extracting synchronization into a dedicated signal transmission and timing adjustment mechanism, the main flight control calculations are freed from complex synchronization corrections, thereby improving calculation reliability while maintaining synchronization accuracy through the dedicated mechanism.
Solution Approach 2:
The synchronization signal acts as an intermediary that handles timing coordination separately from the main calculation processes. This mediator approach isolates synchronization-related operations from critical flight control calculations, reducing the risk that synchronization complexity will compromise calculation reliability while still achieving accurate process synchronization.
3Reliability
If waiting time is extended to ensure synchronization signal reception, then synchronization reliability is improved, but process execution time increases
Solution Approach 1:
The patent applies preliminary action by having devices transmit synchronization signals at predetermined timing before process execution begins. Devices prepare and send synchronization signals in advance, allowing receiving devices to anticipate timing requirements without extending waiting periods. This preliminary signal transmission enables devices to synchronize their execution timing proactively, maintaining reliability while minimizing time loss.
Data Source
AI summary
In a process synchronization control system for performing a synchronization process of synchronizing a process among redundant channels, each of the channels includes an input unit; an output unit; a processing unit; a process execution timer which is used for executing a process in the channels; and a waiting time measurement timer which measures a waiting time in the synchronization process, in which the processing unit executes: a synchronization signal output process of outputting the synchronization signal to other channels at the start of the synchronization process; a synchronization signal input process of waiting for the synchronization signal input from the other channels until a predetermined waiting time by the waiting time measurement timer elapses; and a timer synchronization process of synchronizing the process execution timer if the synchronization signal of the other channels is input after the elapse of the waiting time.