A novel multi-fork z-axis gyroscope is presented in this paper. Different from traditional quartz gyroscopes, the lateral electrodes of the sense beam can be arranged in simple patterns; as a result, the fabrication is simplified. High sensitivity is achieved by the multi-fork design. The working principles are introduced, while the finite element method (FEM) is used to simulate the modal and ...

Conventional gyroscopes are equipped with a single-axis control input, limiting their performance. Although researchers have proposed control algorithms with dual-axis control inputs to improve gyroscope performance, most have verified the control algorithms through numerical simulations because they lacked practical devices with dual-axis control inputs. The aim of this study was to design a p...

MEMS (Micro-electro-mechanical Systems) refer to devices or systems integrated with electrical and mechanical components in the scale of microns. Due to its small size, low cost, low power consumption and high efficiency, MEMS technology has been widely used in many fields. In this paper, a novel comb-driven, differential capacitance sensing MEMS vibratory gyroscope based on glass-silicon-glass...

This paper investigates temperature compensation methods used for the scale factor and bias of the MEMS gyroscope within the temperature range from 40°C to 60°C. The structure and periphery monitor circuit are introduced. Then the determinant elements of the MEMS gyroscope’s scale factor are analysed and the results indicate that scale factor is directly proportional to drive amplitude and sens...

A novel demodulation scheme for interferometers with optical phase modulation is described. The optical phase shift is measured by mixing a train of square digital pulses with a photodetector current and adjusting the pulse spacing by using an electronic closed loop. The optical phase shift is tracked with deviation less than 0.007 rad, which can be easily corrected by using a look-up table. An...

An Inertial Navigation System (INS) can easily track position, velocity and orientation of any moving vehicle. Generally, deterministic errors are present in an uncalibrated Inertial Measurement Unit (IMU) which leads to the requirement of an accurate estimation of navigation solution. These inertial sensors, thus, needs to be calibrated to reduce the error inherent in these systems. By mathema...

Here we propose a novel quartz micromachined gyroscope. The sensor has a simple cross-fork structure in the x-y plane of quartz crystal. Shear stress rather than normal stress is utilized to sense Coriolis' force generated by the input angular rate signal. Compared to traditional quartz gyroscopes, which have two separate sense electrodes on each sidewall, there is only one electrode on each si...

We have built and tested a large area multiturn superfluid He phase slip gyroscope. This device demonstrates quantum-mechanical phase coherence of superfluid He over a macroscopic length scale ~1.4 m!. The sensing loop area of this device is two orders of magnitude larger than our proof-of-principle model, with an improvement in sensitivity of ;20 over any other superfluid He gyroscope. We find...