CPS

Tēma: Kiber-fizikālās sistēmas (Cyber-Physical Systems - CPS)

Literatūra

When Bigger Is Not Better: Small, Low-Pin-Count Processors That Can Handle the Job:

http://bit.ly/15DCsqT

Abstract - With the ever-continuing push for higher functional integration, complex MCU packages with hundreds of pins are now commonplace. Chipmakers are taking advantage of the high-pin-count parts to fit everything possible either on chip or around the periphery.

But not every microcontroller design needs a lot of I/O. Internal peripherals and resources can still perform rather complex functions and need only a pin or two such as UART, I²C, PWM, or SPI. What’s more, some designs are better suited to small size, low-pin-count parts in small packages that can fit in very tight spaces. These parts may also be inexpensive enough to essentially be “throw away”. In addition, the low power capability of these processors is, as they say in personnel recruitment ads, “a plus.” The difference maker in many cases is that the small, low-pin-count MCU is able to perform functions that otherwise would take several discrete chips and circuit elements to perform.

This article looks at some very small sized microcontrollers (16 pins or less) and the ranges of features and performances at the engineer’s disposal for size-constrained, tight-fitting applications. We will examine some of the available architectures for 8-, 16-, and 32-bit parts, as well as some advanced peripherals and review the capabilities of these processors, which include mixed-signal functionality.

Shields are your friend, except when...:

http://bit.ly/12Wtpgu

Abstract - Engineers just love to put shields on circuits, mostly as a defensive measure against signals on the outside getting into and disturbing our circuits, but they also keep signals inside from getting out and this really makes the folks responsible for EMI compliance happy.

Even on low-frequency circuits, shielding can take care of drift due to air currents and AC power mains pickup. At higher frequencies shielding can take care of emissions and pickup. In RF or microwave circuits shielding makes possible radio receivers, spectrum analyzers and all sorts of equipment that simply would not function without sufficient shielding and the isolation that it provides between the various RF and IF sections.

Cyber-Physical Systems: Integrated Computing and Engineering Design:

http://www.google.lv/books?id=AcanAAAAQBAJ

Abstract - Many things need to be done to realize the benefits of cyber-physical systems. With these goals for CPS improvement, the book discusses the many challenges that must first be overcome, and provides a roadmap on how to do it. Accounting for random events that can occur in a real environment can be troublesome for a system when trying to ensure safety, security, and predictability.