31 research outputs found
On the applicability of integrated circuit technology to general aviation orientation estimation
The criteria of the significant value of the panel instruments used in general aviation were examined and kinematic equations were added for comparison. An instrument survey was performed to establish the present state of the art in linear and angular accelerometers, pressure transducers, and magnetometers. A very preliminary evaluation was done of the computers available for data evaluation and estimator mechanization. The mathematical model of a light twin aircraft employed in the evaluation was documented, the results of the sensor survey and the results of the design studies were presented
Transcription of the Workshop on General Aviation Advanced Avionics Systems
Papers are presented dealing with the design of reliable, low cost, advanced avionics systems applicable to general aviation in the 1980's and beyond. Sensors, displays, integrated circuits, microprocessors, and minicomputers are among the topics discussed
Aircraft digital control design methods
Variations in design methods for aircraft digital flight control are evaluated and compared. The methods fall into two categories; those where the design is done in the continuous domain (or s plane) and those where the design is done in the discrete domain (or z plane). Design method fidelity is evaluated by examining closed loop root movement and the frequency response of the discretely controlled continuous aircraft. It was found that all methods provided acceptable performance for sample rates greater than 10 cps except the uncompensated s plane design method which was acceptable above 20 cps. A design procedure based on optimal control methods was proposed that provided the best fidelity at very slow sample rates and required no design iterations for changing sample rates
Copper Physical Development of Copper Latent Images
Copper physical development of copper latent images was researched. The proposed method for producing copper latent images was to soak a titanium dioxide in a copper (II) sulfate nucleating bath and expose to UV radiation below 4l0nm. The exposures were to produce the copper latent image. Three physical developers were used to try to intensify the latent images. The developers utilize an iron (II)/iron (III) redox system to reduce copper (II) sulfate to copper metal. The developers also contain carboxylic acids as complexing agents for iron (III) ions and cationic surfactants for stability. The printout achieved was not stable and shown not to be copper metal. A copper colloid emulsion was prepared. The three physical developers bleached the copper colloid. A physical developer using formaldehyde as a reducing agent was prepared. The developer produced a brown to purple color change on the copper colloid emulsions
Π ΡΡΠ°ΡΠΈΡΠ΅ΡΠΊΠΈΡ Π³ΠΈΠΏΠΎΡΠ΅Π·Π°Ρ ΠΏΡΠΈ ΡΠ΅Π³Π»Π°ΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ ΠΎΠΏΠ°ΡΠ½ΡΡ Π½Π°Π³ΡΡΠ·ΠΎΠΊ
It is considered the known practice of the statistical methods usage under the unvestigation of the dangerous loads action on the human organism as well as under the reglamentation of the human conditions and activity.Π Π°ΡΡΠΌΠΎΡΡΠ΅Π½Π° ΠΈΠ·Π²Π΅ΡΡΠ½Π°Ρ ΠΏΡΠ°ΠΊΡΠΈΠΊΠ° ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½ΠΈΡ ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΡΡΠ°ΡΠΈΡΡΠΈΠΊΠΈ ΠΏΡΠΈ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΠΈ ΠΎΠΏΠ°ΡΠ½ΡΡ
Π½Π°Π³ΡΡΠ·ΠΎΠΊ Π½Π° ΠΎΡΠ³Π°Π½ΠΈΠ·ΠΌ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°, ΠΏΡΠΈ ΡΠ΅Π³Π»Π°ΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ ΡΡΠ»ΠΎΠ²ΠΈΠΉ ΠΈ Π²ΠΈΠ΄ΠΎΠ² Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°
Aircraft digital control design methods
Investigations were conducted in two main areas: the first area is control system design, and the goals were to define the limits of 'digitized S-Plane design techniques' vs. sample rate, to show the results of a 'direct digital design technique', and to compare the two methods; the second area was to evaluate the roughness of autopilot designs parametrically versus sample rate. Goals of the first area were addressed by (1) an analysis of a 2nd order example using both design methods, (2) a linear analysis of the complete 737 aircraft with an autoland obtained using the digitized S-plane technique, (3) linear analysis of a high frequency 737 approximation with the autoland from a direct digital design technique, and (4) development of a simulation for evaluation of the autopilots with disturbances and nonlinearities included. Roughness evaluation was studied by defining an experiment to be carried out on the Langley motion simulator and coordinated with analysis at Stanford
ΠΡ Π²Π΅ΡΠΎΡΡΠ½ΡΡ ΠΏΡΠ΅Π΄ΡΡΠ°Π²Π»Π΅Π½ΠΈΠΉ ΠΠΊΠΊΠ»Π΅ΡΠΈΠ°ΡΡΠ° ΠΊ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΠΌ ΠΌΠ΅ΡΠΎΠ΄Π°ΠΌ ΡΠ΅Π³Π»Π°ΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ
The comparison of the translations of the Ecclesiast Book poem 9.11 provided us to consider the notion βcaseβ formation. The chance phenomenon comprehence, but not the blind trust to the risk professional investigations, can prevent the statistical methods errors under the dangerous actions reglamentations.Π‘ΠΎΠΏΠΎΡΡΠ°Π²Π»Π΅Π½ΠΈΠ΅ ΠΏΠ΅ΡΠ΅Π²ΠΎΠ΄ΠΎΠ² ΡΡΠΈΡ
Π° 9.11 ΠΠ½ΠΈΠ³ΠΈ ΠΠΊΠΊΠ»Π΅ΡΠΈΠ°ΡΡΠ° ΠΏΠΎΠ·Π²ΠΎΠ»ΠΈΠ»ΠΎ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅ΡΡ ΡΠΎΡΠΌΠΈΡΠΎΠ²Π°Π½ΠΈΠ΅ ΠΏΠΎΠ½ΡΡΠΈΡ Β«ΡΠ»ΡΡΠ°ΠΉΒ». ΠΡΠΌΡΡΠ»Π΅Π½ΠΈΠ΅ ΡΠ΅Π½ΠΎΠΌΠ΅Π½Π° ΡΠ»ΡΡΠ°ΠΉΠ½ΠΎΡΡΠΈ, Π° Π½Π΅ ΡΠ»Π΅ΠΏΠΎΠ΅ Π΄ΠΎΠ²Π΅ΡΠΈΠ΅ ΠΏΡΠΎΡΠ΅ΡΡΠΈΠΎΠ½Π°Π»ΡΠ½ΡΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡΠΌ ΡΠΈΡΠΊΠ° ΠΌΠΎΠΆΠ΅Ρ ΠΏΡΠ΅Π΄ΡΠΏΡΠ΅Π΄ΠΈΡΡ ΠΎΡΠΈΠ±ΠΊΠΈ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΡΠ°ΡΠΈΡΡΠΈΡΠ΅ΡΠΊΠΈΡ
ΠΌΠ΅ΡΠΎΠ΄ΠΎΠ² ΠΏΡΠΈ ΡΠ΅Π³Π»Π°ΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ ΠΎΠΏΠ°ΡΠ½ΡΡ
Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΠΉ
Proceedings of the Air Transportation Management Workshop
The Air Transportation Management (ATM) Workshop was held 31 Jan. - 1 Feb. 1995 at NASA Ames Research Center. The purpose of the workshop was to develop an initial understanding of user concerns and requirements for future ATM capabilities and to initiate discussions of alternative means and technologies for achieving more effective ATM capabilities. The topics for the sessions were as follows: viewpoints of future ATM capabilities, user requirements, lessons learned, and technologies for ATM. In addition, two panel sessions discussed priorities for ATM, and potential contributions of NASA to ATM. The proceedings contain transcriptions of all sessions
DC Cancellation As a Method of Generating a t^2 Response and of Solving the Radial Nonobservability Problem in a Concentric Free-Falling Two-Sphere Equivalence-Principle Experiment in a Drag-Free Satellite
This paper solves two major problems which have blocked a free-fall
Equivalence-Principle (EP) in a satellite for 25 years: a semimajor-axis error
between the two proof masses cannot be distinguished from an EP violation and
the response to an EP violation only grows as t not t^2. Using the cancellation
method described in this paper, the nonobservability problem can be suppressed
and a t^2 response can be generated which lasts between 10^4 and 10^6 seconds
depending on the cancellation accuracy. t^2 response times between 10^5 and
10^6 seconds are equivalent to a very tall (0.1 to 10 AU) drop tower with a
constant gravitational field of 3/7 ge.Comment: 40 pages, 7 figures, Revision 3.0: Reviewer's suggested corrections
for journal submissio