Achieving Optimal Performance in the Aviation and Aerospace Industry through Real-Time Location and Tracking Systems (RTLS): Maximizing Efficiency, Productivity, and Cost-Savings

The use of Real Time Location and Tracking Systems (RTLS) in the aviation and aerospace manufacturing and maintenance industries can greatly improve efficiency, productivity, and cost-effectiveness. By providing real-time data on the location and status of work in progress or aircraft parts and maintenance equipment, RTLS can streamline production and maintenance operations, reduce downtime, and improve productivity. Additionally, the cost-saving potential of RTLS is significant, as it can help identify and address inefficiencies in production and maintenance processes, reduce the need for manual labor, and minimize the risk of equipment loss.

 RTLS is increasingly being utilized in the aviation industry to effectively track and manage various critical assets, such as costly parts, calibrated tools, and maintenance equipment. By doing so, manufacturers can easily monitor the location and status of these assets throughout the production process, ensuring that they are accounted for at all times. Additionally, RTLS technology can also be used to track and monitor third-party assets, such as expensive calibrated tools or components that may be owned by a third party, such as a customer and/or the government.

 The integration of RTLS within the aviation and aerospace sector has the power to transform operations and significantly boost industry performance through increased efficiency, productivity, and cost savings. Implementing RTLS can revolutionize the way the industry functions, improving overall performance and operation.

 According to a report by Polaris Market Research, the global aircraft manufacturing market is valued at $413.51 billion in 2021 and is expected to grow at a CAGR of 3.7% between 2022-2030. This growth is likely to further increase the need for more efficient manufacturing practices, including the use of RTLS in the production process. In aviation this can mean fewer grounded aircraft and added flight time.

 Additionally, labor shortages have emerged as one of the key challenges facing the aviation maintenance industry, as reported by Oliver Wyman's 2022 MRO Survey and Industry Challenges. This issue has been particularly severe in the aviation sector, and it is projected to continue to worsen as the market grows. To address this, efficiency in the manufacturing and maintenance process will be of paramount importance to the industry. Listen to the podcast.

 This guide will explore the use of RTLS in the aviation and aerospace manufacturing and maintenance industry, including:

·       What RTLS is and its importance in the Smart Factory, Digital Transformation, and Industry 4.0.

·       The different technologies used in RTLS

·       How different technologies perform in heavy metal environments

·       The use of RTLS in aviation and aerospace manufacturing and maintenance facilities

·       The use of RTLS for tracking calibrated tools

 

What is RTLS and its Importance in the Smart Factory, Digital Transformation and Industry 4.0?

RTLS is a vital technology for the Smart Factory, Digital Transformation, and Industry 4.0. For many organizations, implementing a location solution like RTLS may be the first step in modernizing their factories.

Unlike global positioning systems (GPS), RTLS focuses on localized positioning. While both track time and location, RTLS also includes identification as a key feature, even in situations where identifying information is protected. RTLS provides micro-level positioning where GPS is imprecise -- indoors, underground, and in GPS-denied environments, for example.

In simple terms, RTLS provides actionable data on the “what, where, and when" within a defined area. For example, RTLS can show which specific part (what) passed through a particular station (where) during a specific time (when) in a manufacturing process. Another example is RTLS can track which container (what) was loaded onto a specific truck (where) at a specific time (when) during the workday.

 It's crucial to understand that RTLS encompasses a variety of location intelligence technologies. These can include systems that offer proximity-based information or precise coordinates that identify devices at specific points, providing temporary location data at the point of scan, for example. However, for the purpose of this guide, we will be focusing on systems that provide continuous real-time identification, location, and timing data - the "what, where, and when" - as mentioned earlier. It's important to emphasize that the accuracy of location data is vital to the effectiveness of the data and the usefulness of the RTLS system.

 According to MRO Business Today’s MRO Market Forecast 2023, “Another positive development that would bring in some good cheer in the new year, is the introduction of newer technologies. Strides have been made in the areas of advanced air mobility (AAM), space, the use of digital thread and smart factories. MRO companies that quickly seize these emerging opportunities are expected to gain substantial financial gains.”

Different Technologies Used in RTLS

There are various ways to achieve real-time location tracking, but the most common approach is using radio frequency identification (RFID) technologies, such as WiFi, Bluetooth/Bluetooth Low Energy (BLE) or Ultra-Wideband (UWB).

The basic concept behind an RF approach is the use of tracker labels or tags, to mark and track objects or personnel. A system of reference points, located in known positions, receives transmissions from these tags to calculate the location and/or timing data. These reference points can be referred to as antennas, anchors, beacons, or gates, depending on the system being used.

Some RTLS systems calculate location data at the edge, while others send it back to a server first. Different systems may use signal strength, triangulation or trilateration. Most require a clear line-of-sight between tags, and antennas/beacons/transceivers. Many have varying parameters for hardware installation. The key point is that RF transmissions are the primary mechanism for RTLS across all the most common technologies in use.

In the next section, we will discuss these different technologies and their use in heavy metal environments, such as aviation maintenance facilities.

How Different Technologies Perform in Heavy Metal Environments

Manufacturing facilities present a unique challenge for RF technologies. These facilities are often busy, noisy places with a high concentration of metal and moving parts. The metal reflects RF signals, and most surfaces weaken or attenuate them.

 All RF technologies send out a signal from an object, such as a tag, and a beacon or antenna determines the distance from the signaling device. In a metal-reflective environment, each signal from a tag generates the true direct path and many longer reflected paths. To determine location and distance accurately, the goal is to find the shortest direct path between the signaling tag and the receiving antenna.

 Narrow-band RF technologies, such as Wi-Fi, Bluetooth, and Active RFID, find the direct path based on signal strength via Received Signal Strength Indicator (RSSI) technology. However, in a reflective environment, this can lead to inaccurate results. For example, if there is a pile of boxes between the tag and the antenna, the signal will be weaker if it passes through that wall of boxes. The RSSI system will choose the stronger reflected signal, which is the false indirect path, giving an inaccurate location reading. For this reason, these systems often require direct line-of-sight between the tag and antenna.

 According to Dr. Seth Hollar, CTO at WISER Systems, “RSSI technology simply cannot achieve high accuracy in a reflective environment. You can set up a mesh of receivers to measure signal strength in a factory setting but there will be too many reflections for it to be accurate. For RSSI to work properly, it would need to be set up outside with no obstacles to get true accuracy.”

 In crowded, complex, and reflective environments, such as a factory floor, Ultra-Wideband (UWB) is the best technology for Real-Time Location Systems (RTLS). UWB is a broadband technology that locates via time-domaine technology instead of signal strength. UWB transmits short bursts of broad waves, and the antenna chooses the signal with the shortest arrival time to reach it. If the signal is weakened by passing through a pile of boxes or even a wall it won’t matter. Software algorithms that evaluate the timing of each signal, allow the UWB system to determine which signal is the true direct path and generate an accurate location reading. This enables UWB to perform well in a reflective environment with many obstacles, even without line-of-sight.

 This aspect of UWB also allows the technology to perform well in high-ceilinged industrial environments. Bluetooth and Active RFID often have a reading limit of about 20 feet because the signal strength becomes too weak beyond that range to capture accurate readings. Some systems try to compensate by amping up the power. Besides the increased cost and carbon footprint, there may be adverse health implications associated with prolonged exposure to high-powered RF radiation.

Ultra-low power UWB, on the other hand, can accurately read from distances of 100 to 200 feet away, making it a more viable option in high-ceilinged environments like aerospace facilities or hangars. UWB technologies also have the benefit of not interfering with common communication protocols such as Wi-Fi or Bluetooth.

Using RTLS In Aviation and Aerospace Manufacturing and Maintenance Facilities

The resurgence of air travel to pre-pandemic levels has brought several challenges to the airline industry, with the aviation and aerospace manufacturing and maintenance, repair, and overhaul (MRO) sector bearing the brunt of this increased demand. This has led to increased workloads for already underfunded and understaffed aviation facilities.

One major challenge for many of these facilities is tracking parts and managing work order flow. These facilities often receive numerous airplane engines and parts daily, which are disassembled and sent to various machine stations for repair across the facility. Tracking thousands of parts/work orders each day without the right technology can be overwhelming.

The pandemic has also led to a shortage of staff, leading facilities to need more efficient workflow management systems that save man hours and make the whole facility more productive.

An accurate, efficient, and simple location system is crucial for these facilities to track their work orders in real-time, giving them a constant overview of their entire shop. With the right RTLS system, facilities can avoid having to manually search for parts based on the final operation performed on them, which can be time-consuming.

RTLS can be used to accurately read current location data, allowing facilities to measure the turn-around times of all parts operations and track work orders entering and exiting each machine. This allows the user to collect weeks' worth of real data to identify and address bottlenecks in their processes.

Custom zones can also be created to track the movement of process inventory as parts enter and leave established zones, providing a more accurate estimate of when a part will be completed. Additionally, because the engines being maintained may not belong to the aviation facility, it’s essential to track all components as they are shipped to other stations and even other facilities, and then return for final reassembly.

The aviation manufacturing environment is unique for RTLS wireless radio-based systems because achieving high accuracy and adaptability can be challenging. As we mentioned in the previous section, facilities with metal and reflective surfaces need to ensure that the RTLS system they are considering is accurate, secure, flexible, and works in this type of environment, both indoors and outdoors (if needed), and can scale to the required number of assets. Many systems may not be able to do all these functions accurately and reliably in these types of environments.

Using RTLS for Calibrated Tool Tracking

Calibrated tools use on the manufacturing floor affixed with WISER tracking tags