Estimation of load exceedances of an aircraft undercarriage with nonlinear properties excitated by random runway unevenness

In this report various methods to describe a landing gear with nonlinear properties and excitated by random runway unevenness during taxying have been investigated. The results of calculations have been compared to measured results from an analog computer simulation. The mean behaviour, standard deviations and power spectra, can be described...

Investigation of a cross-coupling drift compensation method on a single axis gyro stabilized platform

In this report the phenomenon of cross-coupling drift (both S-IA and S-OA) due to vehicular angular movements is investigated. In a hardware test set-up, using an experimental Single Axis Platform composed of surplus parts from the former Eldo-A program, the theoretical result as well as a proposed method of compensation is verified.

Investigation on a passenger ride-comfort improvement system with limited control surface actuator performance for a flexible aircraft

For the low wing-loading aircraft, considered in this investigation, vertical acceleration appeared to be an important factor concerning passenger comfort. To reduce vertical motions, a ride-comfort improvement system was introduced. Determination of parameters of the system, like gains and allowable performance limitations, required analog...

Application to an hydraulic problem

Description of an analog computer to determine flow in the delta of the Sacramento river related to the Shasta Dam. Discussion by Van Veen on a similar computer developed in the Netherlands to compute tidal flow in tidal rivers

Solution of an hydraulic problem by analog computer

Comments on a paper on Analog Computers by Glover, Herbert and Daum, as published by ASCE.