Angular Velocity Transducer Research Articles

Compensation of the Influence of Linear Acceleration on the Parameters of a Frame Micro Optoelectromechanical Angular Velocity Transducer

Compensation of the Influence of Linear Acceleration on the Parameters of a Frame Micro Optoelectromechanical Angular Velocity Transducer

Frame micro-optoelectromechanical angular velocity transducer with optical readout units based on the optical tunneling effect

Frame micro-optoelectromechanical angular velocity transducer with optical readout units based on the optical tunneling effect

Microoptoelectromechanical ring angular velocity transducer based on the optical tunnel effect for control system of mobile objects

In this article, the influence of the ring resonator parameters on the characteristics of the angular velocity transducer based on the optical tunneling effect (OTE) is investigated and model is introduced. The sensitivity of the module based on the optical tunneling effect is calculated to provide a quasi-linear range. The analysis of influence of linear acceleration on the ring angular velocity transducer based on the OTE is described. The compensation of the linear acceleration effect by using the differential processing method and switching, which provide the measurement of angular velocities with high accuracy for the entire measurement range, is described.

Effect of Linear Acceleration on the Characteristics of an Optoelectronic Ring Transducer of Angular Velocity and Its Compensation

The effect of linear acceleration on the characteristics of an optoelectronic vibration ring angular velocity transducer is analyzed taking into account the stiffness of the ring resonator supports. A method for compensating for the effect of linear acceleration on the characteristics of the angular velocity transducer is proposed.

Driven Camshaft Power Mechanism of the Vehicle Diesel Engine Fuel Pump

The article deals with the actual problem associated with poor-quality operation of vehicle engines with incomplete loading and operation at partial high-speed modes. It is shown that such engine operating modes make up the bulk of the time, especially when the vehicle operates in urban conditions. Poor engine performance in these modes results in decline in fuel economy and environmental performance. To improve the technical performance of diesel engines, a device is proposed that allows control the uneven rotation of camshaft of vehicle diesel fuel pump. The kinematic schemes of the angular velocity transducers for fuel pump camshaft power mechanism, the kinematic and power drive calculation method are developed.

Investigation of the Characteristics of the Three-axis Ring Typed Angular Velocity Transducer Based on Optical Tunneling Effect

.

Mixed Slip-Deceleration PID Control of Aircraft Wheel Braking System

Aircraft antiskid braking system is designed to prevent the main wheels from locking and additionally seeking the optimal braking performance. Wheel deceleration is the traditional controlled target used in antiskid system, since it can be easily measured by angular velocity transducer. However the optimal target value is hard to find due to the changing of road-surface and aircraft velocity. An alternative controlled target is the wheel longitudinal slip which is more robustly controllable under all conditions. But the wheel slip cannot be measured directly, that will definitely result in control error from the poor estimated aircraft speed. In this work a PID control scheme based on mixed slip-deceleration input variable is proposed for aircraft antiskid braking system. This control algorithm is able to stabilize the wheel slip around any equilibrium point. Moreover, it inherits all the appealing characteristics of slip control, while overcoming its sensitivity to slip measurement errors.

Методика расчета одноосевого микро-опто-электро-механического преобразователя угловых скоростей

The method for calculating of single-axis micro-opto-elctro-mechanical (MOEM) angular velocity transducer based on the optical tunneling effect (OTE) is conceived. This paper is created the algorithm and the software development that allows calculating transducer’s basic parameters in providing of defined technical requirements.

Three-Axis Micro-Opto-Electro-Mechanical Angular Velocity Transducer Based on the Optical Tunneling Effect

A three-axis micro-opto-electro-mechanical (MOEM) angular velocity transducer model based on the optical tunneling effect was developed. The transfer function was determined, and the effect of destabilizing factors on the characteristics of the three-axis MOEM angular velocity transducer was evaluated. The dynamic range of the MOEM transducer based on the optical tunneling effect was calculated.

Methods of Expanding the Measurement Range of Micro-Opto-Electro-Mechanical Angular Velocity Transducer

Methods for expanding the measurement range of micro-opto-electro-mechanical (MOEM) angular velocity transducer based on the optical tunneling effect and an algorithm for forming output optical signals are developed. An approximating function of the dependence of the output pulse duration of the MOEM transducer on angular velocity is determined.

Male and female WorldSID and post mortem human subject responses in full-scale vehicle tests

ABSTRACTObjective: This study compares the responses of male and female WorldSID dummies with post mortem human subject (PMHS) responses in full-scale vehicle tests.Methods: Tests were conducted according to the FMVSS-214 protocols and using the U.S. Side Impact New Car Assessment Program change in velocity to match PMHS experiments, published earlier. Moving deformable barrier (MDB) tests were conducted with the male and female surrogates in the left front and left rear seats. Pole tests were performed with the male surrogate in the left front seat. Three-point belt restraints were used. Sedan-type vehicles were used from the same manufacturer with side airbags. The PMHS head was instrumented with a pyramid-shaped nine-axis accelerometer package, with angular velocity transducers on the head. Accelerometers and angular velocity transducers were secured to T1, T6, and T12 spinous processes and sacrum. Three chest bands were secured around the upper, middle, and lower thoraces. Dummy instrumentation included five infrared telescoping rods for assessment of chest compression (IR-TRACC) and a chest band at the first abdomen rib, head angular velocity transducer, and head, T1, T4, T12, and pelvis accelerometers.Results: Morphological responses of the kinematics of the head, thoracic spine, and pelvis matched in both surrogates for each pair. The peak magnitudes of the torso accelerations were lower for the dummy than for the biological surrogate. The brain rotational injury criterion (BrIC) response was the highest in the male dummy for the MDB test and PMHS. The probability of AIS3+ injuries, based on the head injury criterion, ranged from 3% to 13% for the PMHS and from 3% to 21% for the dummy from all tests. The BrIC-based metrics ranged from 0 to 21% for the biological and 0 to 48% for the dummy surrogates. The deflection profiles from the IR-TRACC sensors were unimodal. The maximum deflections from the chest band placed on the first abdominal rib were 31.7 mm and 25.4 mm for the male and female dummies in the MDB test, and 37.4 mm for the male dummy in the pole test. The maximum deflections computed from the chest band contours at a gauge equivalent to the IR-TRACC location were 25.9 mm and 14.8 mm for the male and female dummies in the MDB test, and 37.4 mm for the male dummy in the pole test. Other data (static vehicle deformation profiles, accelerations histories of different body regions, and chest band contours for the dummy and PMHS) are given in the appendix.Conclusions: This is the first study to compare the responses of PMHS and male and female dummies in MDB and pole tests, done using the same recent model year vehicles with side airbag and head curtain restraints. The differences between the dummy and PMHS torso accelerations suggest the need for design improvements in the WorldSID dummy. The translation-based metrics suggest low probability of head injury. As the dummy internal sensor underrecorded the peak deflection, multipoint displacement measures are therefore needed for a more accurate quantification of deflection to improve the safety assessment of occupants.

Исследование влияния параметров кольцевого резонатора на характеристики трёхосевого оптоэлектронного преобразователя угловой скорости

Исследование влияния параметров кольцевого резонатора на характеристики трёхосевого оптоэлектронного преобразователя угловой скорости

Static and dynamic characteristics of angular velocity and acceleration transducers based on optical tunneling effect

Theoretical and experimental analysis of quasi-linear conversion function of angular velocity and acceleration microoptoelectromechnical (MOEM) transducers based on optical tunneling effect (OTE) are conducted. Equivalent oscillating circuit is developed and dynamic characteristics of angular velocity and acceleration MOEM-transducers are investigated.

Исследование характеристик кольцевого волнового оптоэлектронного преобразователя угловой скорости

Исследование характеристик кольцевого волнового оптоэлектронного преобразователя угловой скорости

Micro-opto-electro-mechanical angular velocity transducer based on the optical tunneling effect

The possibility of designing a micro-opto-electro-mechanical (MOEM) angular velocity transducer based on the optical tunneling effect is discussed. A MOEM transducer model has been developed. Dependences of the output optical power and output voltage on angular velocity have been obtained. The effective measurement range of angular velocities that provides quasilinearity of the transfer function has been determined. The effects of the design parameters of the sensitive element and temperature on the performance of the transducer are analyzed.

МИКРООПТОЭЛЕКТРОМЕХАНИЧЕСКИЙ ПРЕОБРАЗОВАТЕЛЬ УГЛОВЫХ СКОРОСТЕЙ НА ОСНОВЕ ОПТИЧЕСКОГО ТУННЕЛЬНОГО ЭФФЕКТА

МИКРООПТОЭЛЕКТРОМЕХАНИЧЕСКИЙ ПРЕОБРАЗОВАТЕЛЬ УГЛОВЫХ СКОРОСТЕЙ НА ОСНОВЕ ОПТИЧЕСКОГО ТУННЕЛЬНОГО ЭФФЕКТА

Investigation of Microopto-eletromechanical Angular Velocity and Acceleration Transducers based on Optical Tunneling Effect

In this paper the possibility of microopto-electromechanical (MOEM) angular velocity and acceleration transducers based on optical tunneling effect (OTE) is considered. The generalized model of MOEM transducers with various types of sensing elements (SE) is developed, transfer functions are investigated, and the errors with various design parameters of transducers are estimated.

Research on Fiber Optic Gyroscope Test Data Management System

FOG is a new type of angular velocity transducer; it is widely used in aviation, aerospace, marine and other fields. During FOG R & D, the test work costs long time, there are many test data in FOG life cycle, including structured data and unstructured data. This paper analyzed the FOG R & D process, and classified the test data. The paper also analyzed the test data management requirements and pointed out the main problems in the test data management. Based on this, test data management methods and test data management system architecture are given in this paper. Finally, a test data management system with B / S structure is developed. DOI: http://dx.doi.org/10.11591/telkomnika.v11i5.2468

Postural sway in migraine patients and controls, results from a population based CAMERA-2 study

Methods Trunk sway in the medio-lateral (roll) and anterior-posterior (pitch) plane was measured using two digital angular velocity transducers attached to the lower back. Subjects completed three different trials. All tests were done interictally and investigators were blinded for all participant characteristics. Outcomes are given as trunksway angles and angular velocity in both the roll and pitch plane.

Association of Deep Brain Stimulation Washout Effects With Parkinson Disease Duration

Deep brain stimulation (DBS) of the subthalamic nucleus (STN) improves symptoms of Parkinson disease (PD), including bradykinesia. When stimulation ceases abruptly, bradykinesia returns gradually. The duration of the gradual, slow washout varies across patients, and although the origin of this variability is unclear, it is hypothesized to be related to 1 or more clinical characteristics of patients. To determine if a correlation exists between clinical characteristics of patients with Parkinson disease (age, age at disease onset, disease severity, disease duration, medication dose, or time since surgery) and the washout rate for bradykinesia when STN DBS is discontinued. Serial quantitative assessments of bradykinesia were performed during a defined period following cessation of STN DBS. Academic research. Twenty-four patients with Parkinson disease who underwent STN DBS were enrolled in the study. Patients were assessed while off medication (medication had been discontinued 10½ to 16½ hours before testing), and stimulator settings were unchanged for a mean (median) of 20 (14) months. We measured bradykinesia in the dominant hand by assessing finger tapping (item 23 on the Unified Parkinson Disease Rating Scale), which was quantified using an angular velocity transducer strapped on the index finger. Finger tapping was assessed every 2 minutes for 20 seconds at a time. This was performed during a 20-minute period with DBS on (baseline period), during a 50-minute period following discontinuation of STN DBS for the dominant hand, and again during a 20-minute period after turning on the device. When STN DBS was turned off, an initial fast but partial loss of benefit was observed, which was followed by a further slow washout of the residual therapeutic effect. The half-life of the slow washout phase varied significantly across patients, and this variation was strongly related to disease duration: patients with shorter disease duration experienced slower washout, while patients with longer disease duration experienced faster washout. Washout of STN DBS effects varies with Parkinson disease duration. Estimates of proper washout time based on one patient population may not apply to populations with different disease durations. In DBS clinical trials, washout intervals should be chosen conservatively or adjusted for individual variation in the rate at which washout occurs.