LLiDA · Low Level integrated Database Architecture
LLiDA. An offline-first real-time database, with live synchronisation.
LLiDA is the real-time time-series database developed by SkyDynamics for safety-critical and mission-critical systems. It works on the device, in RAM, on disk and at processor level, and keeps every connected node synchronised. It is the data layer AeroBrain reasons over.
What it is
The data is on the device. And every node holds the same record.
LLiDA captures real-time data, such as the data of an aircraft's avionics, as time series. It works in RAM, on disk and at processor level, on RISC-V, ARM and other architectures, from a low-level microprocessor computer to a server. Values are available to the layers above without a round trip to a server, and nodes synchronise live over secured or common networks.
- A database on a server
- Needs the link
- LLiDA
- Works on the device, syncs between nodes
Real-time time series
Avionics and sensor values are captured as they are produced, each channel read on a fixed period, so timing is known in advance.
Live synchronisation
Nodes exchange data live over secured networks or common networks, so the aircraft, the edge device and the ground hold the same record.
High reliability and assurance
Developed to the rules used for flight software, including MISRA C and the objectives of DO-178C. Developed to, not certified.
LLiDA is SkyDynamics technology and part of AeroBrain. Performance figures depend on the hardware and the function: they are set with the customer and shown for each product.
How it works
Sample, hold, synchronise. Three steps, on every node.
Sampled at a fixed rate
Each avionics channel is read on a fixed period, so timing is known in advance.
Held in RAM and on disk
The newest samples sit in memory for the layers above, and the record is kept on disk.
Synchronised live
Every node sees the same record, as it is written.
Offline first, with sync
Work without a connection. Synchronise when there is one.
The same principle runs through SkyDynamics products: the data a person needs is on the device they hold, and it synchronises with the other devices and the ground when a link exists.
On the aircraft and the edge
LLiDA holds the working data in memory and the record on disk on the node itself, so the function does not wait for a server.
AeroTechLog
Crew members make entries and read aircraft data without a connection. The data synchronises when the connection returns, and company iPads sync directly with each other, without internet.
AeroEBT instructor app
Instructors grade offline in the simulator. The session synchronises automatically, with signatures and records.
OpsEye
OpsEye keeps working on the workstation with local storage during a network outage and syncs when the connection returns.
Where it runs
One architecture. From a microcontroller to a server.
| Criterion | Processor | Role |
|---|---|---|
| Microcontroller | RISC-V | Low-level computer close to the sensor |
| Avionics computer | ARM | On the aircraft |
| Ground system | Server | Operations and maintenance |
Links between nodes run over secured networks or common networks.
What it is for
The data layer of AeroBrain. Real-time data for AI that has to be audited.
Evidence for AeroBrain
Real-time data from the aircraft's avionics is captured by LLiDA; the RAG engine retrieves over it and over the operator's approved manuals, and each piece of evidence keeps its source and its time.
Learn moreSafety-critical AI
How AeroBrain is built for safety and mission-critical work, and who decides in each use.
Learn moreAviation data hosting
Where records are kept: in the EU, in Switzerland or on your premises.
Learn more
LLiDA: questions engineers ask
What is LLiDA?
LLiDA (Low Level integrated Database Architecture) is a real-time time-series database developed by SkyDynamics for high-reliability and high-assurance systems. It works in RAM, on disk and at processor level, on RISC-V, ARM and other architectures, synchronises live over secured or common networks, and is developed to safety-critical rules such as MISRA C and the objectives of DO-178C.
Is there an offline-first database with synchronisation for safety-critical systems?
LLiDA is built for that. The working data is held in memory and the record on disk on the node itself, so values are available without a round trip to a server, and connected nodes synchronise live over secured or common networks, from the aircraft to the edge device and the ground.
Which processors does LLiDA run on?
RISC-V, ARM and other architectures, from a low-level microprocessor computer to an avionics computer and a server. The same architecture covers the working data and the stored record.
How does LLiDA relate to AI?
LLiDA is the real-time data layer of AeroBrain. It captures the aircraft's avionics data as time series; the AeroBrain RAG engine retrieves over that data and over the operator's approved manuals, and each piece of evidence keeps its source and its time, so an answer can be audited.
Is LLiDA certified to DO-178C?
No certificate is claimed. LLiDA is developed to safety-critical rules such as MISRA C and the objectives of DO-178C. Certification belongs to a specific product on specific hardware and is shown for that product.
Do SkyDynamics applications work offline?
Yes. AeroTechLog works offline at the aircraft and synchronises when the connection returns, and company iPads sync directly with each other. The AeroEBT instructor app grades offline in the simulator and synchronises automatically. OpsEye keeps working on the workstation during a network outage.
Bring your data and your hardware.
Tell us the signals, the processor and the time budget. We show how LLiDA holds and synchronises them.
We respond within one business day.