Modular Architecture for Aerial Robotic Systems

A modern UAS is not one aircraft, but a system of platform, power, sensors, payload, communications, onboard software and ground loop. Modular architecture is needed to develop such a system without completely reworking the project for each new task.

For AERIS, modularity means clear interfaces and boundaries of responsibility. If a module can be replaced, but it is not known how it is powered, communicated and diagnosed, this is not modularity, but a risk.

Start with the mission requirements

The modular approach is especially useful when the customer’s missions change: today a visual inspection is required, tomorrow thermal imaging control, later - computer vision or another communication channel.

• describe possible future scenarios;
• select a stable core of the system;
• understand which modules need to be replaced;
• fix interfaces and restrictions;
• lay down diagnostics and documentation.

Components of a complete solution

The architecture is divided into layers: platform, energy, computing, sensors, communications, mission logic and ground software. Each layer should have clear interfaces.

• mechanical interfaces define fastenings and dimensions;
• electrical interfaces specify power and protection;
• digital interfaces define exchange protocols;
• software interfaces separate mission logic from the platform;
• Operational interfaces describe maintenance and replacement.

Key engineering constraints

Modularity has a price: weight reserve, space, documentation and additional checks.

• universal mounts may be heavier than optimal ones;
• excess nutritional reserve increases weight;
• each interface must be tested;
• compatibility of software versions needs to be monitored;
• Not all modules can be replaced without retesting.

Practical application

The development of a modular system proceeds in iterations: basic configuration, testing, adding load, checking interfaces, updating documentation and transferring experience to the next configuration.

This approach helps avoid starting every project from scratch. The team retains proven solutions and changes only those parts that are required for the new mission.

Common mistakes

Modularity is often understood too superficially.

• call a node without a described interface a module;
• do not maintain a compatibility matrix;
• do not check heat and power after replacement;
• do not document software versions;
• design “for everything at once” without real scenarios.

Checklist before starting the project

For modular architecture you need:

• subsystem map;
• description of interfaces;
• weight and nutrition restrictions;
• module replacement procedure;
• test plan after change;
• documentation for operation.

Practical conclusion: Modular architecture is useful when it reduces the cost of change. This requires not slogans, but managed interfaces, tests and documentation.