Enhancing Pilot Comfort and Safety with Advanced Optical Simulations in Ansys SPEOS

Even pedestrians are familiar with how distracting glare from the sun, headlights of oncoming vehicles, or reflections from wet surfaces can be. For drivers, these optical distortions become even more challenging as they navigate the road safely. Beyond external lighting conditions, interior lighting can also be a concern if critical information on a vehicle’s indicator panels is not clearly visible.

Now, imagine facing similar difficulties while piloting a helicopter at night or in poor weather, struggling to see both the sky and control panels to chart a safe course. Such a situation would pose serious risks for the pilot, crew, and passengers.

Safety is undeniably a top priority in aviation, and optical system design plays a crucial role in ensuring it. Additionally, with growing global concerns about climate change, sustainability has become increasingly important. Regulatory bodies like the Federal Aviation Administration (FAA) and the European Union Aviation Safety Agency (EASA) mandate that manufacturers develop safe and energy-efficient products. This increased emphasis on safety and efficiency has driven many manufacturers to seek innovative solutions to enhance design and streamline the certification process.

Section 01The Role of Ansys SPEOS in Cockpit Lighting Optimization

Ansys SPEOS provides an advanced platform for optimizing cockpit lighting by simulating real-world lighting conditions, ensuring optimal visibility, and minimizing glare. It helps engineers assess illumination uniformity, contrast, and readability of displays in various environments. By optimizing light distribution and reducing visual discomfort, SPEOS enhances pilot safety, comfort, and regulatory compliance.

Unlike traditional trial-and-error methods that require physical prototypes, Ansys SPEOS enables engineers to digitally test and refine cockpit lighting designs early in the development process. This significantly reduces costs, accelerates time-to-market, and improves overall system performance.

Section 02Challenges in Cockpit Lighting

Cockpit lighting must be designed for optimal visibility while minimizing distractions. However, unlike standard vehicle lighting, cockpit lighting must ensure readability of instruments and displays in highly dynamic conditions—ranging from bright daylight to low-visibility nighttime flying. Poor lighting design can lead to visual fatigue, misinterpretation of flight data, and ultimately, compromised pilot efficiency and safety.

The critical questions that arise when designing the cockpit lighting include:

• How is the visualization of Pilot in daytime, and nighttime?
• How is the glare of sun is affecting the pilot vision?
• The analysis of the interior reading lighting?
• How are the reflections due interior lights are affecting the pilot?
• How are reflections due to sun are affecting the pilot?

Section 03How Ansys SPEOS Enables Accurate Optical Simulations

Ansys SPEOS is a powerful tool for human vision analysis (visualization and glare studies) and straylight analysis (reflection studies). It allows engineers to accurately simulate cockpit lighting conditions, test for visual clarity, and optimize illumination to meet safety standards. These steps include:

1. Setup the Model in Ansys SPEOS

• Import the CAD model to Ansys SPEOS.
• Apply materials to all cad geometry.
• Define sources to displays and LEDs inside the cockpit.
• Define the natural light sources exterior to cockpit.
• Define the human vision sensors and irradiance sensors for visualisation and lamp analysis.

2. Perform the Simulation in Ansys SPEOS

• Run the simulation by selecting geometries, sources, and sensors.
• Perform different simulations for different sensors and sources.
• Combine the simulation results for lit/unlit appearances.

3. Analyse the results using Ansys SPEOS labs

a. Visualization of Pilot

b. Glare due to sun on pilot’s vision.

c. Reflection on windshield and raytracing due to interior displays.

d. Reflections on interior dashboards due to change in sun positions (along the day).

Section 04Benefits of Using Ansys SPEOS for Cockpit Lighting Design

By using Ansys SPEOS, manufacturers gain several advantages in cockpit lighting design:

1. Improved Safety and Compliance

With the ability to simulate real-world lighting conditions, engineers can ensure compliance with aviation safety standards. SPEOS helps identify and mitigate risks associated with glare, reflections, and inadequate illumination.

2. Enhanced Pilot Comfort and Performance

Optimized cockpit lighting reduces eye strain, improves focus, and enhances the pilot’s ability to interpret critical flight data, leading to more efficient decision-making.

3. Reduced Prototyping Costs and Development Time

Traditional cockpit lighting design relies on multiple physical prototypes, which are costly and time-consuming. SPEOS enables virtual testing, eliminating the need for extensive prototyping and accelerating time-to-market.

4. Sustainable and Energy-Efficient Designs

As aviation moves towards sustainability, reducing energy consumption is critical. Ansys SPEOS helps optimize light distribution, ensuring minimal power usage without compromising visibility.

5. Comprehensive System Optimization

By integrating cockpit lighting simulations with broader aircraft system models, manufacturers can ensure seamless interaction between lighting, instrumentation, and overall cockpit ergonomics.

Conclusion

Ansys SPEOS provides a powerful solution for analysing and optimizing cockpit interior lighting, ensuring optimal visibility, safety, and compliance with aviation standards. By simulating real-world lighting conditions, SPEOS enables engineers to assess illumination uniformity, glare reduction, and display readability under various scenarios. It helps refine light distribution to enhance pilot comfort while preventing visual strain.

Additionally, its advanced simulations accelerate the design process, reducing the need for physical prototypes and streamlining certification. With Ansys SPEOS, manufacturers can create cockpit lighting systems that improve pilot efficiency, enhance situational awareness, and contribute to a safer and more sustainable aviation industry.