Electro-hydraulic servo valve frequency characteristic test system
A frequency characteristic test, electro-hydraulic servo valve technology, applied in the fluid pressure actuation system test, fluid pressure actuation device, mechanical equipment, etc., can solve the problems of computer resource shortage, system complexity, occupancy, etc., and achieve test accuracy Controllable, high measurement and control efficiency, and the effect of ensuring accuracy
Inactive Publication Date: 2015-04-08
HUNAN UNIV
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Problems solved by technology
Obviously, this structure is a fully automatic computer-aided testing solution, but the signal generation board and the module-in / module-out card occupy two PCI slots of the computer, which may cause tension in computer resources, and there is a signal processing link that makes the system complication
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[0030] Such as image 3 with Figure 4As shown, an embodiment of the present invention includes a host computer, a servo valve amplifier, a dynamic cylinder, and a servo valve. The host computer is connected to the servo valve amplifier through a mold-in / die-out card, and the servo valve amplifier is connected to an intelligent frequency measurement and control circuit, the speed sensor in the dynamic cylinder is connected to the intelligent frequency measurement and control circuit, the servo valve amplifier is connected to the servo valve through the terminal of the servo valve, and the servo valve is between the servo valve and the dynamic cylinder Oil port A and oil port B of the integrated block are respectively connected with oil port A and oil port B of the dynamic cylinder (Note: the servo valve has 4 oil ports, which are pressure oil port P, oil inlet A, oil inlet Port B, oil return port T. When the working current of the servo valve is positive, the oil circuit is P...
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The invention discloses an electro-hydraulic servo valve frequency characteristic test system, which comprises an upper computer, a servo valve amplifier, a dynamic cylinder, a servo valve and an intelligent frequency measurement and control circuit, wherein the intelligent frequency measurement and control circuit comprises two crystal oscillators, a programmable waveform generator, a digital potentiometer, a DC (Direct Current) -blocking circuit, a bipolar operational amplifier integrated circuit, an ADC (Analog to Digital Converter), a band-gap reference voltage, a power module, a low dropout regulator, a low power consumption microprocessor monitoring circuit, a microcontroller, an electrically erasable PROM (Programmable Read-Only Memory), an RS-232 and a TTL (Transistor-Transistor Logic) level shifter. The electro-hydraulic servo valve frequency characteristic test system has controllable frequency characteristic test precision, high measurement and control efficiency and a simple system structure, and is low in hardware system cost.
Description
technical field [0001] The invention relates to a testing system for an electro-hydraulic servo valve, in particular to a testing system for frequency characteristics of an electro-hydraulic servo valve. Background technique [0002] The basic principle of the frequency characteristic test of the electro-hydraulic servo valve: the electro-hydraulic servo valve is a linear time-invariant system. When the amplitude of the input signal is constant and the frequency is constantly changing sinusoidal signal, after the system reaches a steady state, the output signal is the same frequency sinusoidal signal with varying amplitude and phase. If a harmonic signal is input to the system: The steady-state response signal of the system is: Amplitude-frequency characteristics of the system and phase-frequency characteristics Collectively referred to as the frequency characteristics of the system. [0003] The testing methods for frequency characteristics of electro-hydraulic ser...
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IPC IPC(8): F15B19/00
Inventor 邹宪军陈顺红吴占涛
Owner HUNAN UNIV