-
Posts
6428 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Everything posted by phant
-
F-16C Viper Development Report F-16C INS+GPS System Overview The navigation system on the DCS: F-16C Viper is a complicated mixture of technical solutions that are intended to supply the avionics with coordinates, velocity, and angles, that are characterised by precision, availability, integrity and autonomy. This is achieved by the cooperative work of the Inertial Navigation System (INS) and Global Positioning System (GPS) whose navigation inputs are processed through a Kalman filter in the Modular Mission Computer (MMC). Let’s discuss each of the components in detail. INS The Inertial Navigation System is an autonomous device that performs dead reckoning of aircraft coordinates by measuring the accelerations and then integrating them twice whilst taking into account the aircraft’s orientation in space. The latter is obtained from the F-16 ring-laser gyros. This type of INS is termed “strapdown” as there are no rotating parts. Basically, INS consists of three accelerometers, each for one orthogonal axis, and three gyros. The main features of INS improvements are: Autonomy, as it doesn’t require any external signals to do dead reckoning. Stability in a short period of time (5-10 minutes). Noticeable error accumulation over longer periods of time based on the physics of dead reckoning. Together with the integration of accelerations (to update speed) and integration of position (to update coordinates), the small errors at the level of accelerations that are introduced by accelerometer noises and imperfect alignment are integrated twice as well. Furthermore, the larger those errors are, the faster they accumulate due to the so-called integral correction of INS, which updates the local Earth gravitational force vector with the coordinates and adds them into the relative angles of the G vector. Another distinctive feature of INS is the Schuler Oscillation with a period of 84.4 minutes. Due to the integral correction algorithm mentioned above, the INS behaves like a pendulum. In ideal circumstances, it stays in equilibrium while the aircraft moves along the Earth. When coordinate errors appear, it displaces the pendulum from the resting point and it starts oscillating. The larger the errors are, the larger the amplitude of the introduced oscillations. That’s why one may notice that INS errors get smaller at a rate of 84.4 minutes once airborne. GPS Global positioning system measures the aircraft position by measuring the signal propagation delay from GPS satellites to the receiver. Satellite orbits are precisely known, the exact positions of the satellites are computed according to an almanack that is transmitted in the same GPS radio signals. That’s why GPS needs a couple of minutes after the cold to start obtaining the almanack. The moments of the signal transmission are also known and are defined by a very precise atomic clock on board the satellite. Thus, in an ideal case, if the GPS signals are propagated through space with the constant speed of light, as they do in a vacuum, the receiver could precisely determine its position by intersecting the surfaces of equidistant radio signal delays from the satellites. You may think of it as spheres with centres located at the satellite’s positions, although it’s a bit more complicated in real life. However, there are two significant factors that prevent us from obtaining the ideal point of the surface intersections; the ionospheric delay and multipath. Both add unknown time to the actual signal propagation time. Multipath happens when the receiver is placed relatively near the ground and the signal may be reflected from ground objects that results in the signal's edges degrading; this is similar to an echo in the mountains where it’s too hard to tell one word from another. When such delays are unexpectedly added by the receiver, the precise navigation solution gets lost and the output coordinate gets noisy. That’s where military GPS signals help to get a better signal resolution by the use of so-called P-codes, and the usage of dual frequency helps to eliminate the unknown ionospheric delay. Integrated solution. Kalman filtering To summarise the above: we have two navigation systems, both of which have flaws: INS accumulates errors over time, GPS is noisy and prone to interference due to natural factors like multipath and ionospheric delay and to enemy jamming and spoofing. Here is the good news! There is a way to avoid these flaws with the Kalman filter. It takes GPS and INS coordinates together with speeds as its input. The Kalman filter is a great algorithm that is able to get the maximum precision even out of measurements far from ideal, and it takes the best aspects from both systems: the stability and autonomy of INS and the precision of GPS to obtain an integrated navigation solution that is both stable and precise. Furthermore, the Kalman filter knows, in terms of mathematical equations, the dynamic properties of the aircraft that is moving through space. If the aircraft is moving, it predicts where the aircraft will be on the next filter step. That’s why it is called recursive and the filter won’t let erroneous GPS signals decrease the precision of the output navigation solution. Moreover, it is able to dynamically change its measurements vs. prediction weights to adjust to a degraded navigation precision of any input. Bye Phant
- 1295 replies
-
- viper
- eagle dynamics
-
(and 1 more)
Tagged with:
-
In questa fase sarebbe saggio evitare speculazioni gratuite (o, peggio, insulti altrettanto gratuiti) dato che si tratta evidentemente di un contenzioso contrattuale di cui non si sa nulla. Gli aggiornamenti post ADL furono limitati ad alcuni funzioni legate all'armamento (e, con tutta probabilità, legati a versioni avioniche + recenti rispetto a quelle simulate da RB che solo ADL poteva fornire): è evidente che la qualità del modulo pre ADL è stata determinante proprio in funzione della sua adozione da parte di ADL stessa. Bye Phant
-
Bye Phant
- 322 replies
-
- 2
-
-
- polychop-simulations
- kiowa warrior
-
(and 1 more)
Tagged with:
-
L'impressione di alcuni reparti dell'Armée de l'Air invece è stata così positiva da adottare un modulo RB come simulatore. Stessa cosa per la FAE (Fuerza Aérea Ecuatoriana) che vede il proprio simulatore di A-29B sviluppato da RB (simulatore di cui avremo la controparte commerciale anche su DCS, fatti salve eventuali cambi di roadmap). Il tutto per completezza di informazione. Bye Phant
-
Hai dato un'occhiata ai changelogs dello SE da quando è stato rilasciato? Tutto si può dire meno che il modulo sia trascurato. Una IA è prevista (benché non inizialmente pianificata) ed il paragone con il Tomcat è improprio: si tratta di ruoli diversi e, lato avionico, il pilota di uno SE ha molta più "libertà" di operare dal front seat rispetto al '14. Bye Phant
-
The DCS: Afghanistan map - Available on the for pre-purchase 20 years of the War on Terror and the Soviet operations of the 1980s place Afghanistan as one of the most important combat theatres of the past half century. Few war zones have ever seen more A-10C, AH-64D, F-16C, F/A-18C, CH-47F, Mi-24P, Mi-8MTV2, and Su-25 sorties. The entire map of Afghanistan and small portions of neighbouring countries will be available, showcasing our latest map technologies at a superb level of detail and fidelity. DCS: Afghanistan is offered with a special 30% discount at $48.99 during pre-purchase. The early access release price will be set at 20% off, or $55.99, until the final release. We have also decided to make this map more accessible by offering users the option of purchasing regions separately: Southwest, East and North. Each region will be offered as a separate release at approximately 3 months interval. Today, you can pre-purchase DCS: Southwest Afghanistan for $23.99 instead of the release price in June 2024 that will be set at $29.99. DCS: East Afghanistan and DCS: North Afghanistan will be offered for purchase as and when they are ready, later this year. The early access release of DCS: Afghanistan will focus on a detailed southwestern and encompass 12 airfields, including Kandahar and Herat. Whilst the entire map is under development, the Southwest region is currently the most complete. The second region to be released will be the Eastern region and finally the Northern region. Please keep in mind that even if you purchase only one region, you will still be able to play online across the whole map. Only the non-purchased regions will be in lower detail. We are truly excited to offer you this monumental map and to give you the chance of purchasing in stages at more bite-sized prices should you so choose. Key Features at Early Access The entirety of Afghanistan with the southwestern portion available in high detail at early access. High-resolution terrain mesh, textures and objects that look great from low to high altitude. Numerous, authentically modelled air bases such as Kandahar and Herat. Diverse terrain ranging from towering mountains to vast deserts. Recreate battles spanning the last 40 years. Densely populated towns and villages Afghanistan Area: 1449216 sq km DCS: Southwest Area: 471381 sq km DCS: East Area: 320529 sq km DCS: North Area: 443199 sq km Year: 2008-2010 Advanced normal map technology for mid- and long-range landscape detail Improved closeup surface material for better detail Highly detailed city scenes, buildings, vegetation, static cars and more Highly detailed airfield scenes Unique objects, cultural monuments Highly detailed road network Bye Phant
-
DCS: Afghanistan FAQ Bye Phant
-
MiG-29A Fulcrum Announcement Our MiG-29A, NATO codename Fulcrum, will be the export modification of the “A” version that was supplied to Warsaw Pact countries. The MiG-29A was designed to counter all types of aerial targets with radar- and infrared-guided R-27, R-73, and R-60 air-to-air missiles and its single-barreled 30mm cannon with 150 rounds of ammunition. The MiG-29A also has limited visual ground attack capability with 50 to 500 kg bombs, cluster bombs, and unguided S-5, S-8 and S-24 rockets. The MiG-29A can operate day or night and in all weather conditions. Its radar is capable of look-down / shoot-down in a heavy electronic countermeasure environment. The weapons control system consists of two complexes: the Fire Control Radar (FCR) and the Optical-Electronic Targeting Navigation System (OETNS). The OETNS includes an optical-electronic sighting system (OESS), a navigation system, a weapon control system, a unified display system, and multifunctional control panels. The OEPS includes an optical location station OLS that consists of an Infrared Search and Track System (IRST), a Laser Range Finder (LRF), and a Helmet-Mounted Sight (HMS) designation system. The MiG-29 is equipped with the SPO-15 “Beryoza” Radar Warning Receiver (RWR) defence system that is designed to warn of radar-directed weapon attacks. To protect against infrared-guided weapons, the MiG-29A features flare dispensers. The navigation system consists of on-board navigation equipment, a vertical and heading information complex, and an airborne signal system as part of the Optical-Electronic Targeting Navigation System (OETNS). Key features of the DCS module: MiG-29A Fulcrum At Early Access Release: Fully interactive and highly detailed cockpit that is based on 3D laser scanning and photogrammetry. Highly detailed and accurately reproduced external model. Highly detailed pilot model. In-depth study of aircraft systems and equipment. Detailed model of the navigation system with the gyro platform reference system, air data computer, and navigation equipment. Defensive equipment to include the SPO-15LM “Beryoza” and Flare dispenser system. Fire Control Radar with authentic modes for aerial targets. OETNS with modes for air and ground targets. At Final Release: Addition of Identify Friend or Foe interrogation system. Addition of Ground Control Intercept (GCI) command system. Bye Phant
- 19 replies
-
- 2
-
-
Afghanistan Development Report The development of the DCS: Afghanistan Map is progressing on schedule with significant milestones achieved. We are committed to delivering a highly immersive and authentic representation of Afghanistan for virtual pilots to explore and engage in combat operations. Continued collaboration, testing, and refinement will ensure the map’s successful completion and release to our DCS community. Development Progress We have made substantial progress in recreating the diverse landscape of Afghanistan. This includes the rugged mountain ranges of the Hindu Kush, the vast deserts of the Dasht-e Kavir and Dasht-e Lut, and the fertile valleys and river basins. Efforts have been dedicated to accurately portraying the unique cultural and urban features of Afghanistan. This involves recreating cities like Kandahar and Herat, with special attention to landmarks, infrastructure, and architectural styles like the blue mosque of Herat. Aerial imagery has been utilised to enhance the realism and accuracy of the map. High-resolution satellite imagery is being integrated to provide authentic terrain textures and details. The diverse terrain and complex topography of Afghanistan has presented technical challenges due to the large mountainous ranges. Optimization efforts are ongoing to maintain performance without compromising on visual fidelity, particularly in densely populated urban areas and detailed terrain features. The map is designed to look equally as good from low to high altitude. Future Plans In the above screenshot, you can see the area of DCS: Afghanistan that will be available in Early Access. The airfields that will be available at launch include Kandahar, Herat, Bost, Camp Bastion, Chaghcharan, Dwyer, Farah, Maymana Zahiraddin Faryabi, Qala i Naw, Shindand, Tirinkot, and Zaranj. The focus will be on completing the detailing of terrain features, including rivers, roads, vegetation, rocks, small stones, ground clutter and geological formations to enhance immersion and realism. Extensive testing and optimization will be conducted to ensure optimal performance and compatibility with a wide range of hardware configurations. Please stay tuned for the pre-order coming soon! Bye Phant
-
- 181 replies
-
- 1
-
-
- f-4e
- phantom ii
-
(and 1 more)
Tagged with:
-
Of Delays and Silence - Part I Of Delays and Progress - PART II Bye Phant
- 181 replies
-
- 1
-
-
- f-4e
- phantom ii
-
(and 1 more)
Tagged with:
-
La-7 Development Report Prepare to take to the skies and relive history with the upcoming DCS: La-7! Our partners, OctopusG, have been meticulously crafting this legendary World War II fighter aircraft, ensuring an authentic and immersive experience for all virtual warbird pilots. With its powerful engine, agile maneuverability, and formidable armament, the La-7 is poised to become a formidable addition to your virtual warbird hangar. The La-7 by OctopusG is making great progress. The development of the La-7 flight model is now complete, and the assembly and preparation of the necessary documentation for certification is in progress. Unique features have been implemented like the decrease in lifting force when the side cowl flaps are fully opened due to the deterioration of the aerodynamics of the wing root. The above graph demonstrates expected and actual La-7 performance in DCS. From this and other reports, OctopusG will be providing an excellent simulation of the flight performance and characteristics of this famous warbird. An armament system has been completed and includes a bomb-aiming control system. Please enjoy this DCS: La-7 Bombing video and pay special attention to the mechanical details. In this second short video, the cockpit canopy locking system is demonstrated: La-7 Canopy mechanics. In this example, it is important to note that the effect of airflow is present. A wide collection of liveries are being prepared that will continue to expand. The damage model is complete, a quick manual has been written, and 2D for the GUI art has been created. The product is now being finalized for early access. Please stay tuned for the planned launch date. Bye Phant
-
FONTE https://forum.dcs.world/topic/97330-dcs ... nt=5397558 Bye Phant
- 81 replies
-
- 2
-
-
- flyingiron simulations
- corsair
-
(and 1 more)
Tagged with:
-
FONTE https://forum.dcs.world/topic/97330-dcs ... nt=5396924 Bye Phant
-
Credo sia un semplice recap di quanto pubblicato finora (vale x tutti i moduli citati nel video). Le info circa il G-91 presenti in questo thread dovrebbero essere le + aggiornate. Bye Phant
- 78 replies
-
Infatti il punto del mio intervento non è la bontà del modulo in se x se e che ognuno può giudicare come meglio crede (ergo che lo possieda o meno non fa differenza), ma su precise affermazioni (da te) evocate a mio avviso in maniera impropria (e che, probabilmente, sono il motivo del warning che hai ricevuto). Bye Phant
-
Non difendo niente e nessuno: non è mia intenzione fare l'avvocato di nessuno ne credo che P-S abbai bisogno della mia difesa. Va benissimo avere l'opinione più negativa possibile di P-S per le ragioni + varie (come nel tuo caso): quello che non va bene è raccontare cose palesemente false o stravolgere arbitrariamente e gratuitamente le loro parole (ho riportato cose molto circostanziate). E' quello che ho cercato di argomentare nei miei post in questo thread, poi ognuno è libero di pensarla come vuole (ovviamente). Hai scritto il solito panegirico (supercazzola?) sui massimi sistemi ma io ti contestavo precise affermazioni che hai riportato in maniera scorretta o, nella migliore delle ipotesi, del tutto strumentale. Niente da dire se hai la peggiore opinione circa P-S, però non raccontare balle (non c'è ne bisogno). In ultima istanza, linko questo recentissimo video-test (difetti inclusi) di un pilota di elicotteri (ed istruttore): una rondine non fa primavera ma chi avesse tempo e voglia di dare un'occhiata su YouTube sull'argomento Gazelle noterà un giudizio diverso rispetto a quello che emerge (o sembra emergere) da questa discussione. Bye Phant
-
D'accordissimo, però se l'opinione è che cacciano e bannano gli utenti o dipingere Polychop-Simulations una cosa a metà tra la Spectre e una banda di incapaci, capisci che poi qualcuno alza il dito per capire da dove tali opinioni siano saltate fuori: credo che nessuno avrebbe avuto nulla da dire se la questione Gazelle si fosse limitata all'aspetto tecnico. Non stai semplicemente contestando: stai stravolgendo in maniera gratuita e strumentale alcune (banali) comunicazioni di P-S (vecchie di 7 anni) attribuendogli un significato che non avevano (al fine di confermare il tuo pregiudizio). L'Harrier NON è un modulo lasciato a metà o mezzo finito: è un modulo feature complete (al netto della singola features buggata e/o in attesa di risoluzione) che è stato periodicamente aggiornato (anche nell'ultima 2.9.3.51704). Poi per carità, sostenere che la pubblicazione dello Strike Eagle e lo sviluppo del Flogger abbiano monopolizzato l'attenzione di RB è legittimo (probabilmente inevitabile, viste le dimensioni del team). Ma da qui a parlare di modulo abbandonato ce ne passa. Bye Phant
-
Ognuno ha certamente il diritto di criticare quello che non reputa sviluppato correttamente, quello che non va bene è pretendere di far passare proprie interpretazioni personali come fatti oggettivi e utilizzare le medesime per dipingere un quadro che nulla ha a che fare con la realtà (al punto di stravolgere il significato delle parole e del contesto in generale). Nel dettaglio: Per la precisione: tale statement (così formulato) appare in realtà in un intervista su sito helisimmer.com (nell'annuncio originale scrissero currently, we are not sure yet into which simulation this 3d model will be implemented in the end, but it will happen). Per quale astruso motivo, chi leggeva il suddetto statement (circa 7 anni fa, quando furono mostrati i primi render del Kiowa) avrebbe dovuto pensare ad una sceneggiata (parole tue)? E' un semplice report di sviluppo (della loro pagina FB personale, dunque neanche nel forum ufficiale ED) dove facevano presente che, in quel momento preliminare, non erano ancora sicuri di poter confermare il modulo per DCS. Semmai è un atto di trasparenza, a cui tu dai una connotazione gratuitamente negativa. A riprova di ciò di sono ben 140 commenti a quell'annuncio, commenti per il 99.9% entusiasti dell'iniziativa. Come mai nessuno interpreta l'annuncio in oggetto come una sceneggiata, tutti e 140 stupidi? Per contestualizzare: quello che riporti è un SINGOLO commento (sempre di 7 anni fa) preso dal forum italiano dedicato al Kiowa. Dovessi adottare il tuo stesso (sbagliato) metodo potrei citare i 140 messaggi entusiasti di cui sopra. Sarebbe ovviamente un uso strumentale perché tutto va (ovviamente) contestualizzato. Oltre all'operazione gratuita di cherry picking che metti in atto, non potevi scegliere intervento peggiore: quale sarebbero le regole infrante? Pubblicità per altre piattaforme? Naturalmente nell'annuncio originale non si fa menzione dell'interruzione dell'aggiornamento del modulo (come lascia intendere il messaggio che riporti): la cosa fu fatta presente già allora (7 anni dopo sei qui a riproporre la medesima tesi come un disco rotto). E, alla prova dei fatti, il modulo è stato effettivamente aggiornato nel corso del tempo. Stessa identica cosa per quanto riguarda il discorso del collettivo del Gazelle che citasti a sproposito allora (stesso link di sopra, ti fu risposto già allora, cioè 7 anni fa) e riproponi pari pari oggi. Non sono in grado di dire se hanno effettivamente messo mano a quel dettaglio, ma se anche fosse, quale sarebbe il clamoroso passo indietro? Credo che ogni commento sia superfluo: siamo nella pura speculazione gratuita/personale: peccato che la spacci, non si capisce in base a cosa, come verità. Quello che ho capito molto bene è che, partendo da una legittima e fondata critica circa il FM del Gazelle, avete creato la solita tempesta in un bicchiere d'acqua, metodo applicato anche ad altre TP di DCS e puntualmente smentito dai fatti. Bye Phant