Piano is a complete aircraft analysis suite from Lissys Ltd.

Piano is a powerful commercial tool with an established user base of major airframe and aero-engine manufacturers, research and governmental institutions, and environmental organisations worldwide. Originally written in Macintosh Common Lisp, Piano has recently been ported to LispWorks and the user interface is now implemented using LispWorks CAPI graphical toolkit. The cross-platform capability of LispWorks proved to be an invaluable strength. The highly professional LispWorks team impressed Lissys from the start by rapidly prototyping some examples demonstrating the feasibility of such a complex transfer. The actual port was then carried out through Clozure Associates in a timeframe significantly better than our early expectations and resulting in a very stable final product.

Since the inception of Piano in the early 1990s, Lissys has used Lisp to support rapid development. The malleability of the language was a key factor when integrating the multifaceted and interdisciplinary aspects of aircraft project analysis.

The flexibility of LispWorks also allowed us to create two separate tools, one that is fully-featured and largely intended for aeronautical engineers (Piano-5), and one that is freely downloadable and is addressed to a broader audience of anyone interested in aircraft evaluation with an emphasis on environmental emissions (Piano-X). A critical requirement for Piano-X was to provide a clean and simple interface on top of some highly complex underlying methods, a task that both LispWorks and Clozure handled admirably.

In our experience, the straightforward licensing approach and technical professionalism of LispWorks stand out in the complex landscape of software development and create a highly effective combination.

Missile Defense at Raytheon

Raytheon has built SigLab, a Common Lisp platform for signal processing used in missile defense.

It combines high-performance FFTs and composable signal processing components.

By leveraging decades of experience across several kill vehicle programs and vast tactical weapon expertise across every domain and mission area, we’re meeting the critical needs of today and planning for the threats of tomorrow.

Raytheon is the only company working simultaneously on four kill vehicles, providing a pipeline of crucial lessons learned and laboratories and factories teeming with experts whose knowledge is irreplaceable. Pioneering the nation’s early kinetic warhead development provided Raytheon the expertise to evolve the way kill vehicles are produced, tested, deployed, and ultimately how they perform to defend the United States and its allies. The company is building upon this legacy of expertise to revolutionize the role that kill vehicles play in missile defense.

The screenshot shows our SigLab system running a simulation of an incoming nuclear warhead (all exo-atmospheric), and at 40 seconds into the run you see in the middle left 2-D Sonogram display the effects of a nearby warhead exploding and heating up the target being tracked. This analysis was used at Raytheon to develop advanced rapid detection and discrimination systems for targeting incoming nuclear warheads on our EKV project (Exoatmospheric Kill Vehicle).

David McClain, Raytheon