An electro-hydraulic servo valve drive control circuit and method
A technology for driving control circuits and electro-hydraulic servo valves, which is applied in valve details, valve devices, engine components, etc., and can solve problems such as slow response speed, low precision, and complex circuit structure.
Active Publication Date: 2020-02-14
XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA
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Problems solved by technology
[0003] At present, the common electro-hydraulic servo valve control drive scheme is mainly aimed at the realization of current drive, and the circuit structure is complex, the system cost and weight increase, the response speed is slow, the accuracy is not high, the fault detection performance is poor, and the open circuit of the interface is not considered. Short circuit detection, practical application is limited
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[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments. The opening degree of a certain type of electro-hydraulic servo valve is controlled, and the driving current I is required. out The range is (-310mA~+310mA), and the coil resistance of the servo valve is 15Ω.
[0031] see also figure 1 , figure 2 , image 3 and Figure 4 ,in, figure 1 It is a functional principle block diagram of an electro-hydraulic servo valve drive control circuit and method of the present invention, figure 2 It is the hardware principle diagram of an electro-hydraulic servo valve drive control circuit of the present invention, image 3 It is a logic diagram of the open-circuit fault detection of the drive control circuit of the electro-hydraulic servo valve of the present invention, Figure 4 It is a logic diagram of load short-circuit fault detection of an electro-hydraulic servo valve drive control circuit of the present inv...
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The invention belongs to the technology of control of electrohydraulic servo valves, and particularly relates to an electrohydraulic servo valve driving control circuit and method. The electrohydraulic servo valve driving control circuit comprises an integration circuit, a push-pull amplification circuit, a current sampling circuit and a fault detection circuit, wherein a positive input end of theintegration circuit is connected with a ground through a matching resistor; a negative input end of the integration circuit is respectively connected with feedback voltage Vf and control voltage Vc output by the current sampling circuit; tracking of integration voltage VA output by the integration circuit is realized by adopting the push-pull amplification circuit, and driving power is provided;an output end of the push-pull amplification circuit is connected with load through a sampling resistor R0; a load voltage detection end of the fault detection circuit is connected with the load; a load current detection end of the fault detection circuit is connected with an output end of the current sampling circuit.
Description
Technical field: [0001] The invention belongs to the control technology of electro-hydraulic servo valve, and particularly relates to a driving control circuit and method of electro-hydraulic servo valve. Background technique: [0002] Electro-hydraulic servo control systems are increasingly used in aviation and other industrial flow control units because of their small size, light weight, long life and high control accuracy. Electro-hydraulic servo valves are mostly driven by mA-level low current, which has high requirements on the response speed and accuracy of the control system. [0003] At present, the common electro-hydraulic servo valve control drive scheme is mainly aimed at current drive implementation, and the circuit structure is complex, the system cost and weight increase, the response speed is slow, the accuracy is not high, and the fault detection performance is poor. Short circuit detection, practical application is limited. SUMMARY OF THE INVENTION [00...
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IPC IPC(8): F16K31/02
CPCF16K31/02
Inventor 王浩张弛张宝升阎景波赵振宇
Owner XIAN AVIATION COMPUTING TECH RES INST OF AVIATION IND CORP OF CHINA