每帧飞行模型
xp11设置里的每帧飞行模型是干什么用的呀？调低调高对飞行有什么影响吗Mark_Ma 发表于 2020-11-1 23:38
这个指每帧计算几次气动，帧数低了反而要开高，否则会使单位时间计算的气动模型过少导致“飞行控制延迟”
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摘自X-Plane说明书中关于实时气动和帧率关系的一小部分内容：
Airplanes Flutter and Crash in the Simulator
The tendency for some aircraft to flutter and crash is a known limitation. Just as a car can only go a certain speed with a given horsepower, the X‑Plane simulator can only accurately model flight at a certain speed with a given frame rate.
If the frame rate gets too low for the flight model to handle, then the plane is likely to start oscillating quickly back and forth (referred to as “simulator flutter,” often occurring with autopilot on) as the flight model tries unsuccessfully to predict what the plane will do next. At this point, the computer is running too slowly to take small enough steps in the flight model to see what the plane will really do at each moment. Smaller and more maneuverable planes will accelerate more quickly, and greater accelerations require a higher frame rate to simulate.
This occurs due to the way that X‑Plane moves aircraft within the simulation. X‑Plane calculates the acceleration of the craft for each frame, then adds up the acceleration between frames to move the plane. This works fine if the frame rate is reasonably high and the accelerations are reasonable low. In fact, for any reasonably normal aircraft that has reasonably normal accelerations, a frame rate of 20 fps or more is fine.
Problems occur, though, when you have very light aircraft with very large wings going very fast, or sitting on the ground with landing gear spread very far out from the center of gravity. All of these things add up to the same result—high acceleration.
X-Plane, of course, can handle these high accelerations, but it needs a high frame rate to do it. For the flight model to work, there can only be a certain amount of velocity change per frame of the simulation. If the accelerations are high, then the frame rate better be high so that there is a reasonable velocity change (i.e., acceleration) per frame.
To determine how high a frame rate is enough to handle a given acceleration, just find the frame rate at which there is no flutter.
For example, imagine a Boeing 747 at approach speed. It slowly lumbers along, hardly accelerating at all. One frame per second could track that flight accurately. Now imagine holding a paper airplane out the window of a car at 80 miles per hour and letting go. The plane doesn’t smoothly, gradually, accelerate up to speed, it disintegrates in a thousandth of a second! To simulate that may require a simulator to run at one thousand frames per second! 能有什么影响，画质地点，不就没那么亮眼吗 大概是每帧飞机模型的细致度，显卡越好，这个可以调的更高，我都是最低:funk::Q CZ2856 发表于 2020-10-19 16:09
大概是每帧飞机模型的细致度，显卡越好，这个可以调的更高，我都是最低 ...
哦哦 我也最低了 显卡不行 谢谢啦 你要是配置好你就全高 我配置低。。。直接干到最低 感觉调低就行了 这个指每帧计算几次气动，帧数低了反而要开高，否则会使单位时间计算的气动模型过少导致“飞行控制延迟”
根据X-Plane的说明，飞机如果飞得快（比如超音速）或飞机小也得开高，因为这时也需要计算更多次气动确保飞机飞行效果更贴近真实
这里飞行模型指的不是你的机模，是进行实时气动运算的Flight Model
（根据X-Plane knowledge base整理，可能存在纰漏，欢迎补充） 配置好就全高啦 根据自身电脑配置来 你拉一下试试有什么区别不就行了么;P;P 画质 进 来 学 习 一 下 Mark_Ma 发表于 2020-11-1 23:51
摘自X-Plane说明书中关于实时气动和帧率关系的一小部分内容：
Airplanes Flutter and Crash in the Simul ...
开高以后帧数更低了 15z190124 发表于 2020-11-15 22:14
开高以后帧数更低了
因为这个吃CPU的，但是飞行模拟器不像游戏，帧数肯定会低的，关键在找性能和画质的平衡点，所以调设置不能一刀切地“全低”“全高”，要一点点调，这个选项也是，一格一格调，找一个相对平衡的点
帧数降低明显应该也和配置有关，如果跑xp基本不卡的机子调这个影响似乎也不大，但我感觉这个是开高了好，可能看个人具体感受吧。。。 原来没有研究过这个是什么作用，一直没有理会这个，现在知道作用了，感谢 没调整过，都是默认的，一会儿去调下看看 Mark_Ma 发表于 2020-11-1 23:38
这个指每帧计算几次气动，帧数低了反而要开高，否则会使单位时间计算的气动模型过少导致“飞行控制延迟”
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受教了，非常感谢
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