Under supersonic conditions, thrust can be enhanced by 9%, fuel consumption can be lowered by 8%, and turbine temperature can be reduced by 48K. NASA Dryden Flying Test Center’s Orme J.S conducted the PSC supersonic flight test. S applied the full envelope PSC to PW1128 powered F-15 aircraft. Scholars have long researched and experimented with PSC, attempting to apply it to the propulsion system. Therefore, research on comprehensive performance-seeking control algorithms for supersonic propulsion systems is required, and the fusion and conversion of performance-seeking controls with sensor-based controllers necessitates concentrated effort. performance-seeking control (PSC) is an essential mode of intelligent engine control, which is implemented by using optimization algorithms to find the maximum performance potential (maximum thrust, minimum fuel consumption, or minimum turbine temperature) of the model while satisfying various operating limitations. Propulsion systems are characterized by complex structures and wide operating envelopes that cannot be fully exploited by conventional controllers, necessitating the use of fusion optimization approaches. The present control system mostly uses sensor-based control design principles to handle non-measurable parameters, including thrust, temperature, and safety margins indirectly through measurable parameters. With the rapid development of supersonic aero technology, the propulsion system controller requires increased reliability and performance potential, and the control system object increasingly transfers from engine to comprehensive propulsion system. This study presents a theoretical foundation and engineering applications for the design of supersonic propulsion system controllers. Maximum installed thrust mode capable of achieving no thrust loss and a maximum fluctuation rate within 2000 N/s, with the largest variation in thrust during the conversion being less than 0.9% under the minimum turbine temperature mode and the minimum specific fuel consumption mode. The intelligent fusion controller is able to achieve a smooth transition of performance modes to ensure that the engine is provided with a stable thrust during operation under supersonic conditions, and the potential for performance optimization is maintained at a reasonable level. The analysis reveals that the NSDE-GWO hybrid algorithm, which takes advantages of the two algorithms, significantly improves the computing efficiency and optimization accuracy, achieving better optimization solutions in three different modes. Joined: Posts: 2012 Location: British Columbiaģ/4".good bonk and locks you in but not so much it knocks you off your board.To investigate the performance potential of the aero-propulsion system and the problem of control mode conversion, this paper takes the inlet/engine integrated component-level model as the research object, and a performance-seeking control (PSC) scheme based on the neighborhood-based speciation differential evolution–grey wolf optimization (NSDE-GWO) algorithm is designed and combined with an active disturbance rejection control (ADRC) to establish a multivariable fusion closed-loop control system. if you want to relearn your lip tricks you did in '89 on a mini ramp, then dont get challenging. If you are seriously thinking of doing 1", then you are also thinking about putting boulders up there as coping and billiard balls and shit like that. Yea, 3/4" and 1" is super heavy shit and significantly ups the challenge factor, but for me that stuff is for weird concrete scupture pockets and over vert pockets, etc. My preference is 3/8" any more and you'll have to listen to me bitch the entire session. I know this because you are asking and if you liked it way out there like some of these other gnar boys, then you wouldn't be asking. Any more and you'll be like."damn this is sticking out too much". Joined: Posts: 1676 Location: Cincinnati, Ohioġ/4" to 3/8". It should be enough to where you can lock in on stuff, like smith and feeble grinds, enough so you can get a good 'bonk' from nollies and fakie disasters, but not so much that you have to scoop to get around it on most tricks.īut if you're trying to replicate a real pool feel, it should stick out and be gnar. But having it stick way out is rad-especially if its concrete coping that you have to kind of ollie up onto to grind. I find the shorter more difficult to do tricks on while 1/2 to 3/4 seems to be the sweet spot. Site Admin Joined: Posts: 63282 Location: S&B HQ
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