2results about How to "Improve dynamic control performance" patented technology

The utility model discloses a high-precision regulating valve, and relates to the field of regulating valves. A traditional adjusting valve has the problems of low adjusting precision, response lag, poor working condition adaptability and the like. The valve comprises a valve body, a valve seat, a sleeve, a valve rod, a valve core, an adaptive ring, a valve cover, a bracket, a pneumatic straight stroke film actuator, an electrical valve positioner and an air filtering pressure reducing valve. The valve element is matched with a valve seat wedge angle structure, the electric valve positioner and the air filtering pressure reducing valve work cooperatively, precise adjustment is achieved, the air filtering pressure reducing valve purifies and stabilizes an air source, the electric valve positioner constructs a closed loop to control and correct the valve position, and the response speed and the control precision are effectively improved. A metal winding gasket and a V-shaped packing assembly are arranged at key positions of the valve, the sealing performance is enhanced, and the valve adapts to high-temperature, high-pressure and corrosive environments. The problems that a traditional valve is low in adjusting precision, slow in response and poor in adaptability are solved, and the valve is suitable for fluid control systems in multiple industries such as chemical engineering and energy.

The present application relates to the technical field of frequency measurement system and method, and discloses a kind of based on self-adjusting equal-precision frequency measurement system and method, comprising: CPLD and MCU;CPLD includes PLL phase-locked loop module, PLL phase-locked loop module generates required clock, including reference clock, multi-level filter clock;Parallel communication module, parallel communication module simulates Flash read-write timing, simplifies the data read-write interaction of MCU side and CPLD, while ensuring the timeliness of data interaction;Pulse filter module, pulse filter module carries out filtering operation according to the filter level set, to avoid the pulse signal acquisition error caused by high-frequency interference.The present application adopts two kinds of design methods of double-edge collection self-adjustment and collection window self-adjustment, improves the response time of frequency measurement while ensuring the frequency measurement accuracy, compared with traditional frequency measurement mode, can improve the frequency response time by a factor of two at the fastest, meet the higher control demand of industrial field for speed device, improve dynamic control performance.