Long-term use of the wearable computers and Land Warrior ensembles may have unknown physiological effects on the human body. For soldiers, the combination of functions may also have unknown effects on combat effectiveness and performance. As such systems are used for longer periods of time, it will be important to test their effect on the wearer’s body.
Considering all levels in the system, power management of general-purpose computing functions can decrease power requirements by a factor of 2. Reducing peak power demand is especially important, because it increases the life of the energy source. Designing a system using aggressive techniques tailored to the application and to the user modes of interaction can reduce power requirements for computation and communication by several orders of magnitude. In turn, this will reduce weight required for the power sources and enable the system to utilize distributed versus centralized sources.
There are numerous ways to manage and reduce power using energy-efficient design techniques. R&D investment will be needed to enable the Army to evaluate the use of conventional architectures and logic and determine relative advantages of different architectures and circuits to employ for the analog and digital processing in soldier systems as well as to determine the appropriate levels of integration. Modern SoC technology must be demonstrated in soldier systems before its potential can be realized, and such technology will be essential to meet the grand challenge of a 2-W soldier system for future warriors.