Micromechanical gyroscope driving device based on arbitrary waveform of DDS (Direct Digital Frequency Synthesizer)
A technology of micromechanical gyroscope and driving device, which is applied in the direction of rotating gyroscope, etc., and can solve the problems of unstable rotor rotation and high driving power
Inactive Publication Date: 2015-03-18
HARBIN INST OF TECH
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the problem that the existing electromagnetic-driven micro-mechanical gyroscope adopts a single pulse or sine wave drive to cause unstable rotation of the rotor and high driving power, and proposes a micro-mechanical gyroscope drive device based on DDS arbitrary waveform , by controlling the shape and phase of the output waveform, the high-speed rotation of the micro-machined gyroscope can be realized, which helps to improve the performance of the micro-machined gyroscope
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Embodiment 1
[0024] Such as figure 1 As shown, this embodiment includes a host computer 1, a USB serial port communication circuit 2, a main CPU3, a secondary CPU4, a DDS frequency synthesizer 5, a DA converter 6 and a plurality of power stage drive circuits 7, and the main CPU3 and the USB serial port communication circuit 2 Connection, the USB serial port communication circuit 2 is connected to the host computer 1 through the USB bus, the sub CPU4 is connected to the main CPU3 through the data bus, the DDS frequency synthesizer 5 is connected to the main CPU3 and the sub CPU4 respectively, the sub CPU4 is connected to the DA converter 6, and the DA conversion The devices 6 are respectively connected to a plurality of power stage drive circuits 7. The USB serial port communication circuit 2 is mainly responsible for the communication between the drive circuit and the host computer software. The main CPU3 is mainly responsible for the control and coordination of the entire system. It cont...
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The invention provides a micromechanical gyroscope driving device based on arbitrary waveform of a DDS (Direct Digital Frequency Synthesizer). The micromechanical gyroscope driving device comprises an upper computer, a USB (Universal Serial Bus) serial communication circuit, a main / subsidiary CPU (Central Processing Unit), a DDS clock circuit, a DA (Digital / Analog) convertor and a plurality of power driving-stage circuits. A user draws a driving waveform on the upper computer, waveform sampling point data is sent to the main CPU through a USB serial port, and then the waveform sampling point data is transmitted by the main CPU through a data bus to the subsidiary CPU for output or storage. Common waveforms are stored in EEPROMs (Electrically Erasable Programmable Read-Only Memory) of both the two CPUs and the common waveforms can be viewed, outputted or modified according to user requirements. The main CPU is used for controlling the DDS to output square waves with assigned frequency so as to provide a clock signal to the subsidiary CPU, and a multichannel DAC (Digital-to-Analog Converter) is driven to output a driving signal with assigned waveform after frequency division is carried out in the subsidiary CPU, so that a micromechanical gyroscope is driven. The micromechanical gyroscope driving device has the characteristics of being flexible in driving structure and convenient in driving adjustment.
Description
technical field [0001] The invention belongs to the field of micromechanical gyroscopes, and in particular relates to a DDS-based arbitrary waveform micromechanical gyroscope driving device. Background technique [0002] A gyroscope is a sensing device that measures the angle or angular rate of an object relative to inertial space. As early as 1852, the French scientist Foucault created the word "gyroscope" and made a huge single pendulum gyroscope, successfully demonstrating the phenomenon of the earth's rotation. Since the gyroscope has the ability of autonomous navigation in any environment, it has been widely used in the fields of aviation, spaceflight, navigation and military since its inception, and has always been a key technology developed by various countries. With the development of MEMS technology, micro-mechanical gyroscope has become a research hotspot at home and abroad. At present, silicon micromachined gyroscopes are mainly vibrating gyroscopes. This type o...
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IPC IPC(8): G01C19/02G01C19/04
Inventor 张海峰刘晓为翁睿张晓舒尹亮
Owner HARBIN INST OF TECH