Air pressure servo control system with multistage cavities
A servo control system and control system technology, applied in general control systems, control/regulation systems, electric fluid pressure control, etc., can solve problems such as slow response speed and unstable control, reduce difficulty and reduce errors The possibility of switching, the effect of fast feedback
Active Publication Date: 2016-02-03
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
[0004] The pneumatic servo system in the prior art adopts a single-stage cavity system. In the low pressure range, the pumping characteristics of negative pressure sources such as vacuum pumps show a strong nonlinear change, that is, the pressure in the cavity is less than 10KPa. When the system is under negative pressure control, the response speed becomes slow, and the control valve itself is also affected by the nonlinear pressure, resulting in unstable control
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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0033]The invention provides a pneumatic servo control system, which includes a positive pressure source, a controlled volume chamber, a control valve, a positive pressure source, a negative pressure source, a pressure sensor, a controller and a control valve, and the controlled volume chamber is the front stage The cavity and the back-stage cavity, the pressure sensor includes a pre-stage press...
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The invention discloses an air pressure servo control system with multistage cavities. The air pressure servo control system comprises a positive pressure source, a controlled cavity, control valves, etc. An air exhaust opening of the pre-stage control valve is connected to a pre-stage cavity, a negative pressure air intake is connected to a pre-stage negative pressure source, and a positive pressure air intake is connected to the positive pressure source. An air pressure outlet of the post-stage control valve is connected to a post-stage cavity, a negative pressure air intake is connected to a post-stage negative pressure source, and a positive pressure air intake is connected to the pre-stage cavity. Pressure sensors are used for detecting the air pressure of both the pre-stage cavity and the post-stage cavity and conveying the air pressure to a controller. The controller regulates and controls the control valves according to the air pressure of the controlled cavity so as to control the air pressure in the controlled cavity. The controlled cavity is divided into a pre-stage cavity and a post-stage cavity, which are controlled separately. Compared with a single-stage cavity, the multistage cavities are more stable in pressure change, so the possibility of switching the control valves by mistake is minimized.
Description
technical field [0001] The invention belongs to the field of air pressure simulation of high-altitude aircraft, and more specifically relates to an air pressure servo control system. Background technique [0002] When a space vehicle flies in an atmospheric environment, it will be directly affected by the space air pressure environment. Using air pressure servo control technology to design the air pressure simulation equipment of the aircraft hardware-in-the-loop simulation system, through the space vehicle flight height half-in-the-loop simulation, the real flight pressure environment is introduced into the aircraft development process, which can effectively shorten the development cycle, reduce development costs, and eliminate product hidden dangers. Ensure flight stability control. [0003] The air pressure simulation system is actually a specific application of pneumatic servo control technology. The pneumatic proportional / servo control system composed of pneumatic pro...
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Login to View More IPC IPC(8): G05D16/20G05B17/02
Inventor 杨钢李宝仁杜经民傅晓云谭路高隆隆高磊
Owner HUAZHONG UNIV OF SCI & TECH