Presented to:

By:

Date:

Federal AviationAdministration

NAPV Upgrades

Airport Pavement Working Group

Ryan Rutter

April 25, 2012

2Federal AviationAdministration

Airport Pavement Working GroupApril 25, 2012

NAPTV Upgrades:

• Installation of hydraulic oil heaters

• Installation of redundant fiber optic communications cable and supporting festoon system

• Upgrade hydraulic load controllers and servo valves

• Regenerative Braking Study

3Federal AviationAdministration

Airport Pavement Working GroupApril 25, 2012

NAPTV Upgrades – Hydraulic Oil Heater Installation:

• Installed to optimize hydraulic load performance

• Gives best response for test results

• Reduce system start-up time

4Federal AviationAdministration

Airport Pavement Working GroupApril 25, 2012

NAPTV Upgrades – Fiber Optic Cable and Festoon System:

• Installed to provide redundant communications between carriages and control cab

• Last cable break disabled NAPTV and delayed testing for approximately 2 weeks.

5Federal AviationAdministration

Airport Pavement Working GroupApril 25, 2012

NAPTV Upgrades – Hydraulic Load Controllers and Servo Valves:• Upgrade existing Programmable Logic Controllers (PLCs) with

Delta Motion Controllers

• Currently running a Delta Motion Controller on Carriage 2, Module 5 along with a new MOOG digital servo valve.

• Uses a laser range finder to capture the test pavement elevations every 6 inches for preemptive input to the Delta Controller.

• Result is much better control of the hydraulic load over changing test pavement surface.

• Article published in Control Engineering Magazine in December 2011

• Remaining load modules scheduled for upgrade towards the end of the summer 2012.

6Federal AviationAdministration

Airport Pavement Working GroupApril 25, 2012

NAPTV Upgrades – Regenerative Braking Study

• Investigation into the feasibility of using regenerative braking on the NAPTV.

• Also addresses the use of dynamic braking which is essentially replacing use of the mechanical brakes by putting the drive motors in reverse.

• Mechanical brake use can be greatly reduced especially during automatic vehicle operation at reduced speeds.

• ONExia provided feasibility study which gave a plan on replacement of the current 15 year old variable frequency drives (VFD) with new VFD’s, implementation costs, and start up costs.