A tuned gyroscope incorporates a dynamic absorber for lessening the transmissibility of resonant vibrations. The paper shows that the ideally tuned hookes joint gyroscope is capable of operating as a gyrocompass. Up to 3axis gyroscope, accelerometer and magnetometer data can be processed into a full 3d quaternion orientation estimate, with the use of a nonlinear passive complementary filter. These units also include a dcdc converter and filters fully compliant with mil std 461 and mil std 1275. A gyroscope is a device used for measuring or maintaining orientation and angular velocity. First, the principle of mdtg is theoretically analyzed. Temperature drift modelling and compensation for a. Inertial sensors gyroscopes and accelerometers are an important component for a number of civil and military applications. A micro dynamically tuned gyroscope with adjustable static capacitance article pdf available in sensors 2. Gyrocompasses provide true north readings at all times, whereas drytuned gyros provide. Pdf download for errors of the dynamically tuned strapdown gyroscope to.
Pdf a micro dynamically tuned gyroscope with adjustable. Stability analysis of a dynamically tuned gyroscope. This configuration allows the gyro rotor to spin to a free rotor in two axes. The site also looks at the possible uses of gyroscope based propulsion gyroscopic propulsion. The library is targeted at robotic applications, but is by no means limited to this.
Flexure assembly for a dynamically tuned gyroscope sperry. Dynamically tuned vibratory micromechanical gyroscope accelerometer dynamically tuned vibratory micromechanical gyroscope accelerometer lee, byeungleul. A symmetrical arrangement of elastomeric material is utilized to mount the mass to such rotating element. This article is from sensors basel, switzerland, volume. In the 1940s engineers in scotland designed a gyro which used a spinning flywheel on a. Next, some simulations under the optimized structure parameters are given as a reference for the mask design of the rotor wafer and electrode plates. The flexure spring stiffness is independent of spin rate.
Gyroscopes have many uses, this site explains how a gyroscope works and what they can be used for. Dynamically tuned vibratory micromechanical gyroscope. The problem of improving the accuracy and increasing the service life of information measuring systems of stabilization can be solved by using as a sensitive element of a dynamically tuned gyroscope. Performance improvement of a dynamically tuned gyroscope using an input compensator. The dtg is also suitable for application to stabilized electrooptical sights, though little appears in the literature on this subject. Abstract the dynamic tuning of a dynamically tuned gyroscope dtg refers to a clever gimbal configuration that balances the torques from the support flexures with dynamic spring torques created by gimbal flutter while the gyro rotor spins. The g2000 provides high accuracy for stabilization and. Errors of the dynamically tuned strapdown gyroscope to. The dynamic tuning of a dynamically tuned gyroscope dtg refers to a clever gimbal configuration that balances the torques from the support flexures with dynamic spring torques created by gimbal flutter while the gyro rotor spins. The perforation enables the release of the proof mass during etching process in the fabrication. Digital rebalance loop design for a dynamically tuned. The mass and elastomeric material are so chosen with respect to geometry and material composition that out. Gyroscopes market growth, trends, and forecast 2020 2025 the market is segmented by technology mems gyroscope, fibre optic gyroscopefog, ring laser gyroscope rlg, hemispherical resonator gyroscope hrg, dynamically tuned gyroscopedtg and other technologies, enduser vertical consumer electronics, automotive, aerospace and defense, industrial, marine and other end. This paper reports on the experimental clarification of a method of reducing the interacion effect between the input and output proper to the dynamically tuned dry gyro tdg through improvements of the rebalance control circuit rcc and the use of subtorquers with the main torquers.
A damping mass is symmetrical about a rotating element of the gyroscope. This paper presents a novel micro dynamically tuned gyroscope mdtg with adjustable static capacitance. Empirical mode decomposition, a novel nonlinear technology, was first presented by huang et al. The proof mass used in the design enables the reduction of damping effect. It is the smallest dynamicallytuned gyroscope dtg produced and offers high performance, small size, excellent reliability and low cost. A dynamically tuned gyroscope having a single gimbal has torsion flexures with torsional stiffnesses such that, at its tuned speed, the gyroscope is insensitive to angular vibration at a frequency of twice the rotor rotational speed. Fiberoptic gyroscopes ifog, quartz, dynamically tuned gyroscopes dtg, rate and integrating. Errors of the dynamically tuned strapdown gyroscope to constant and harmonic rate inputs sk lee and cw lee proceedings of the institution of mechanical engineers, part c. Experimental results and analysis of the proposed model applied in the drift denoising of a dynamically tuned gyroscope dtg are presented in section 4. Elements of gyroscope classification are introduced, and then the evolution of the gyroscope concept is presented. Pdf development of a dynamically tuned gyroscopedtg. The drive shaft is connected to a first torsion flexure having an effective torsional stiffness k 1 of zero, k 1 being made zero by the use of ball races or. The dynamically tuned gyroscope dtg has been marketed primarily as a lowcost, smallpackage, twoaxis rate sensors for tactical missiles and is used widely in this application.
A dynamically tuned gyro is disclosed in which a gyro rotor is mounted on an rotor shaft of a spin motor through the medium of a hinge unit. Dynamically tuned gyroscopes dtgs as twode greeoffreedom gyroscopes have been widely deployed as instruments for sensing the angular rate of defined axis for many years. Vibrating wheel gyroscope dynamically tuned gyroscope dtg rlg quantum gyroscope london moment gyroscope. First, think of the gyroscope rotor mounted in bearings in a gimbal, as shown in figure 4. A novel hybrid emdbased drift denoising method for a. A micro dynamically tuned gyroscope with adjustable static. The invention belongs to oil field, probing, exploration inertia fields of measurement, relate in particular to a kind of inertial measurement unit and continuous inclinometer for dynamically tuned gyroscope. However, the dynamic inertia from the gyroscopic reaction effect from the gimbal provides negative spring stiffness proportional to the square of the spin speed howe and savet, 1964.
An elastic suspension design framework for tuned gyroscopes. Modeling the dynamically tuned gyroscope in support of high. Overview a tuning fork mems gyroscope is designed with a perforated proof mass. A dynamically tuned gyroscope dtg is a rotor suspended by a universal joint with flexure pivots. Two axis dynamically tuned gyro dtg leveraging our extensive tuned gyroscope technological expertise, utc aerospace systems has produced the fg314, a two axis dynamically tuned gyro. The mdtg2000 gyroscope is a direct formfitfunction replacement for the legacy litton and northrop grumman g2000 dynamically tuned gyro. Through modal analysis, mechanical and static capacitance simulation, the optimized geometry parameters are derived. A dynamically tuned gyro should not be confused with a gyrocompass, a large spinningmass device that is made to rotate and maintain the same direction as the earths rotation. It it shown that small amounts of mistuning will result in gross errors.
Next, some simulations under the optimized structure parameters are given as a reference for. The accuracy and resource of operation of such systems requires an increase. A new hybrid gyroscope with electrostatic negative. Modeling the dynamically tuned gyroscope in support of. As two key components, the process flows of the rotor wafer and electrode plates. In this chapter, first a historical outline of the theory of gyroscopes is given. The stabilization of a northseeking platform using a.
This work describes the principle of operation and the motion dynamics of a dynamically tuned gyroscope, dtg. Dynamically tuned gyroscopes in stabilized electrooptical. The dynamic tuning of a dynamically tuned gyroscope dtg refers to a clever gimbal configuration that balances. Cn101876244a inertia measuring unit and continuous. A flexure assembly for a dynamicallytuned, free rotor, two axis gyroscopic sensor wherein. A kind of inertial measurement unit and continuous inclinometer for dynamically tuned gyroscope. A novel micro dynamically tuned gyroscope mdtg is described from the principle, simulation and fabrication, assembly, circuitry and experimental detail point of view, respectively. Journal of mechanical engineering science 2016 211. Design and fabrication, are the tuning fork gyroscope and the vibrating ring gyroscope. Errors of the dynamically tuned strapdown gyroscope to constant. The rotor shaft is in the form of a hollow hysteresis ring mounted rotatably by the intermediary of a pair of bearings, while the gyro rotor supported by the hinge unit is disposed within the hollow inside space of the hysteresis ring. They demand considerable less investment in materials, machinery, processes and man power when compared to the other usual sensors such as the floated or ringlaser gyroscopes. Calibration is an essential step for dtgs to evaluate the sensor errors and compensate them1. This paper presents a design for a new tuned gyroscope framework consisting of a heavy rotor supported by a heliflex suspension.
The dynamic response of the compass is examined in detail and its accuracy as a northseeking device is assessed. Performance improvement of a dynamically tuned gyroscope. The northrop grumman g2000 twoaxis gyroscope offers superior accuracy in a small package. Applications of gyroscopes include inertial navigation systems, such as in the hubble.
1305 70 1348 668 1269 436 1537 469 813 1339 380 661 737 1066 377 1288 964 557 478 1271 86 390 389 748 1502 153 224 623 633 625 141 270 1007 732 1078 1286 413 413 1469 1146 310 64 1144 999 583 1092 233