Topic
Angular rate sensor
About: Angular rate sensor is a research topic. Over the lifetime, 625 publications have been published within this topic receiving 8722 citations. The topic is also known as: rate sensor.
Papers published on a yearly basis
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Papers
TL;DR: A foot motion filtering algorithm is presented for estimating foot kinematics relative to an earth-fixed reference frame during normal walking motion that incorporates novel methods for orientation estimation, gait detection, and position estimation.
Abstract: A foot motion filtering algorithm is presented for estimating foot kinematics relative to an earth-fixed reference frame during normal walking motion. Algorithm input data are obtained from a foot-mounted inertial/magnetic measurement unit. The sensor unit contains a three-axis accelerometer, a three-axis angular rate sensor, and a three-axis magnetometer. The algorithm outputs are the foot kinematic parameters, which include foot orientation, position, velocity, acceleration, and gait phase. The foot motion filtering algorithm incorporates novel methods for orientation estimation, gait detection, and position estimation. Accurate foot orientation estimates are obtained during both static and dynamic motion using an adaptive-gain complementary filter. Reliable gait detection is accomplished using a simple finite state machine that transitions between states based on angular rate measurements. Accurate position estimates are obtained by integrating acceleration data, which has been corrected for drift using zero velocity updates. Algorithm performance is examined using both simulations and real-world experiments. The simulations include a simple but effective model of the human gait cycle. The simulation and experimental results indicate that a position estimation error of less than 1% of the total distance traveled is achievable using commonly available commercial sensor modules.
181 citations
Patent•
16 Nov 1981
TL;DR: In this article, an angular rate sensor system is disclosed, consisting of a balanced resonant sensor, which consists of a tuning fork of a piezoelectric material, preferably of quartz.
Abstract: An angular rate sensor system is disclosed, consisting of a balanced resonant sensor. The sensor consists of a tuning fork of a piezoelectric material, preferably of quartz. The tines of the tuning fork are caused to vibrate electromechanically, for example, by impressing an alternating voltage on a pair of electrodes on each tine. This will cause the tines to vibrate. Any component of angular motion around the axis of the sensor causes a cyclic deflection of the tines at right angles to the normal driven vibration of the tines. If the rotational input to the handle of the sensor is applied through a torsion element, the resulting tine deflection is directed to cyclically rotate the entire sensor along the input/output axis. This deflection can be used for changing the capacitance of a capacitance bridge, or for generating an electric signal, due to the piezoelectric effect resulting from the deflection. Finally, the output signal may consist of a frequency-modulated signal or an optical pick-up may be used. The system may take various forms, including one, two, four, or eight tuning forks forming a unitary system.
128 citations
Patent•
19 Jun 2002TL;DR: In this article, a roll misalignment angle, a pitch misaligned angle, and a yaw misalignments angle were determined as a function of the sensor outputs of the roll rate, the pitch rate, yaw rate, and the yaw acceleration.
Abstract: A control system (18) for an automotive vehicle (10) having a vehicle body includes a sensor system (16) having housing (52) oriented within the vehicle body. Positioned within the housing (52) are a roll angular rate sensor (31), a yaw angular rate sensor (30), a pitch angular rate sensor (32), a lateral acceleration sensor (27), a longitudinal acceleration sensor (28), and a vertical acceleration sensor (29). The vehicle (10) also has a safety system (38). The controller (26) determines a roll misalignment angle, a pitch misalignment angle and a yaw misalignment angle as a function of the sensor outputs of the roll rate, the pitch rate, the yaw rate, the lateral acceleration, the longitudinal acceleration and the vertical acceleration. The motion variables the vehicle along the vehicle body-fixed frames, including the roll rate, the pitch rate, the yaw rate, the lateral acceleration, the longitudinal acceleration and the vertical acceleration, are then compensated based on the detected sensor misalignments and the sensor outputs of the roll rate, the pitch rate, the yaw rate, the lateral acceleration, the longitudinal acceleration and the vertical acceleration. The controller (26) generates a control signal for controlling the safety system in response to the compensated roll rate, pitch rate, yaw rate, lateral acceleration, longitudinal acceleration and vertical acceleration.
117 citations
Patent•
17 Mar 2009
TL;DR: In this paper, a plurality of generally planar proof masses coupled together for linear drive-mode oscillation along multi-directional drive axes in a plane formed by the first and second input axes.
Abstract: Angular rate sensor for detecting rotation about first, second and third mutually perpendicular input axes having a plurality of generally planar proof masses coupled together for linear drive-mode oscillation along multi-directional drive axes in a plane formed by the first and second input axes. The masses are mounted on a generally planar sense frame for linear movements relative to the sense frame in drive-mode and for rotation together with the sense frame in sense modes. The sense frame is mounted for rotation with the masses in sense modes about the first, second, and third input axes independent of each other, in response to Coriolis forces produced by rotation of the masses about the first, second, and third input axes respectively. And capacitance sensors responsive to the rotational movements of the masses and the sense frame in sense modes are employed for monitoring rate of rotation.
113 citations
TL;DR: In this paper, the authors investigate the behavior of a silicon-based angular rate sensor which uses a cantilever beam for the vibrating mass and examine how the mechanical quality factor influences both the sensitivity and stability of the sensor in the absence of any feedback control.
Abstract: In this paper we investigate the behaviour of a silicon-based angular rate sensor which uses a cantilever beam for the vibrating mass. To this end, we examine how the mechanical quality factor influences both the sensitivity and stability of the sensor in the absence of any feedback control. By way of analysis, a simple physical model is presented that describes both the relationship between the tuned device and its sensitivity and, also, how the stability of the device is affected by the various modes of the beam's vibration.
106 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 6 |
| 2020 | 14 |
| 2019 | 10 |
| 2018 | 16 |
| 2017 | 13 |
| 2016 | 16 |