The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Yutaka Nonomura - One of the best experts on this subject based on the ideXlab platform.
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soi Rate Gyro sensor for automotive control
Sensors and Actuators A-physical, 2006Co-Authors: Yutaka Nonomura, Norio Fujitsuka, K. Mizuno, Makoto Fujiyoshi, Yoshiteru Omura, Kouji TsukadaAbstract:Abstract A silicon on insulator (SOI) Rate Gyro sensor has been developed for automotive controls. The sensor detects yaw Rate of automobiles. The sensor has a new open beam structure (OBS). Excitation and detection electrodes of the OBS are open toward exterior bonding pads in a plane. The FEM analysis results showed the OBS was superior to other structures. The OBS has high independency between excitation and detection modes. This good feature contributed to the stability of vibration mode for the sensor. The sensor was fabricated by the surface micro machining process to miniaturize the size. The measured characteristics show the OBS is suitable for Rate Gyro sensor to be small, highly precise, and low cost.
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SOI Rate Gyro sensor for automotive control
Sensors and Actuators A: Physical, 2006Co-Authors: Yutaka Nonomura, Norio Fujitsuka, Yuji Omura, K. Mizuno, Makoto Fujiyoshi, Koji TsukadaAbstract:A silicon on insulator (SOI) Rate Gyro sensor has been developed for automotive controls. The sensor detects yaw Rate of automobiles. The sensor has a new open beam structure (OBS). Excitation and detection electrodes of the OBS are open toward exterior bonding pads in a plane. The FEM analysis results showed the OBS was superior to other structures. The OBS has high independency between excitation and detection modes. This good feature contributed to the stability of vibration mode for the sensor. The sensor was fabricated by the surface micro machining process to miniaturize the size. The measured characteristics show the OBS is suitable for Rate Gyro sensor to be small, highly precise, and low cost. © 2006 Elsevier B.V. All rights reserved.
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quartz Rate Gyro sensor for automotive control
Sensors and Actuators A-physical, 2004Co-Authors: Yutaka Nonomura, Makoto Fujiyoshi, Yoshiteru Omura, Kouji Tsukada, Masayuki Okuwa, Takeshi Morikawa, Nobuyoshi Sugitani, S Satou, N Kurata, S MatsushigeAbstract:Abstract A new quartz Rate Gyro sensor has been developed for automotive controls. The principle of the sensor is detection of the Coriolis force with a vibrator. An H shape vibrator supported with a stem at its center was used. The vibrator supported at the center was good for the isolation of a small detection motion from a large excitation motion. A new mechanical coupling model and the FEM analysis were used to reduce output offset of the sensor. The detection range of the sensor is from −100 to 100°/s. The sensor output offset is small within ±1°/s in the wide temperature range from −30 to 85 °C. The developed quartz Rate sensor satisfied required specifications and wide temperature stability.
Zhong Su - One of the best experts on this subject based on the ideXlab platform.
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Adaptive sliding mode controller for bell-shaped vibratory angular Rate Gyro
Proceedings of the 33rd Chinese Control Conference, 2014Co-Authors: Zhong SuAbstract:For bell-shaped vibratory angular Rate Gyro has manufacturing errors and the model parameters is easily affected by environment, the existing controller loop can't remove the influence, so the angular Rate can't be exactly estimated. This paper proposes a method of the adaptive sliding mode controller to calculate angular Rate. By analyzing the bell-shaped vibratory angular Rate Gyro's dynamics equations, we get the equation of state including disturbance and parameter perturbation, get proportion integral sliding mode surface with exponential approach law, design a kind of sliding mode controller for bell-shaped vibratory angular Rate Gyro to effectively estimate the input angular Rate. The simulation results prove that the controller can steadily control the bell-shaped vibratory angular Rate Gyro's mode shape and effectively measure the input angular Rate.
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Quadrature drift mechanism and control of bell-shaped vibratory angular Rate Gyro
Proceedings of the 33rd Chinese Control Conference, 2014Co-Authors: Zhong Su, Qing LiAbstract:Quadrature drift is the major error source of the bell-shaped vibratory angular Rate Gyro (abbreviated as BVG), and effective measures must been taken to eliminate it. The aim of this study wants to investigate the quadrature drift mechanism of BVG, in particular the closed-loop control method. The quadrature drift mechanism is deduced in detail on the basis of the equivalent dynamic model, drew a conclusion that the main factor caused quadrature error is frequency split. Quadrature control loop is designed by selecting appropriate electrodes to exert force, and suitable error signal to be error feedback signal. The simulation and experiment both verified the availability of the quadrature control method. The work in this paper will contribute to the system design of BVG.
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research on the signal process of a bell shaped vibratory angular Rate Gyro
Sensors, 2014Co-Authors: Zhong Su, Qing Li, Meng Yin FuAbstract:A bell-shaped vibratory angular Rate Gyro, which is inspired by the Chinese traditional bell, is a kind of axisymmetric shell resonator Gyroscope. Its sensitive element is a vibratory-like Chinese traditional bell, using a piezoelectric element on the wall of the vibrator to detect the standing wave’s precession to solve the input angular Rate. This work mainly studies the circuit system of a bell-shaped vibratory angular Rate Gyro. It discusses the process of circuit system design, analysis and experiment, in detail, providing the foundation to develop a bell-shaped vibratory angular Rate Gyro. Since the bell-shaped resonator’s curved structure has the characteristics of large noise in the piezoelectric signal and large harmonics, this paper analyzes its working and signal detection method, then gives the whole plan of the circuit system, including the drive module, the detection module and the control loop. It also studies every part of the whole system, gives a detailed design and analysis process and proves part of the circuit system using digital simulation. At the end of the article, the test result of the circuit system shows that it can remove the disadvantages of the curved structure having large noise in the piezoelectric signal and large harmonics and is more effective at solving the input angular Rate.
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Characterization of the bell-shaped vibratory angular Rate Gyro
Sensors (Switzerland), 2013Co-Authors: Ning Liu, Meng Yin Fu, Hong Liu, Zhong Su, Qing Li, Jun Fang FanAbstract:The bell-shaped vibratory angular Rate Gyro (abbreviated as BVG) is a novel shell vibratory Gyroscope, which is inspired by the Chinese traditional bell. It sensitizes angular velocity through the standing wave precession effect. The bell-shaped resonator is a core component of the BVG and looks like the millimeter-grade Chinese traditional bell, such as QianLong Bell and Yongle Bell. It is made of Ni43CrTi, which is a constant modulus alloy. The exciting element, control element and detection element are uniformly distributed and attached to the resonator, respectively. This work presents the design, analysis and experimentation on the BVG. It is most important to analyze the vibratory character of the bell-shaped resonator. The strain equation, internal force and the resonator's equilibrium differential equation are derived in the orthogonal curvilinear coordinate system. When the input angular velocity is existent on the sensitive axis, an analysis of the vibratory character is performed using the theory of thin shells. On this basis, the mode shape function and the simplified second order normal vibration mode dynamical equation are obtained. The coriolis coupling relationship about the primary mode and secondary mode is established. The methods of the signal processing and control loop are presented. Analyzing the impact resistance property of the bell-shaped resonator, which is compared with other shell resonators using the Finite Element Method, demonstRates that BVG has the advantage of a better impact resistance property. A reasonable means of installation and a prototypal Gyro are designed. The Gyroscopic effect of the BVG is characterized through experiments. Experimental results show that the BVG has not only the advantages of low cost, low power, long work life, high sensitivity, and so on, but, also, of a simple structure and a better impact resistance property for low and medium angular velocity measurements.
Meng Yin Fu - One of the best experts on this subject based on the ideXlab platform.
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research on the signal process of a bell shaped vibratory angular Rate Gyro
Sensors, 2014Co-Authors: Zhong Su, Qing Li, Meng Yin FuAbstract:A bell-shaped vibratory angular Rate Gyro, which is inspired by the Chinese traditional bell, is a kind of axisymmetric shell resonator Gyroscope. Its sensitive element is a vibratory-like Chinese traditional bell, using a piezoelectric element on the wall of the vibrator to detect the standing wave’s precession to solve the input angular Rate. This work mainly studies the circuit system of a bell-shaped vibratory angular Rate Gyro. It discusses the process of circuit system design, analysis and experiment, in detail, providing the foundation to develop a bell-shaped vibratory angular Rate Gyro. Since the bell-shaped resonator’s curved structure has the characteristics of large noise in the piezoelectric signal and large harmonics, this paper analyzes its working and signal detection method, then gives the whole plan of the circuit system, including the drive module, the detection module and the control loop. It also studies every part of the whole system, gives a detailed design and analysis process and proves part of the circuit system using digital simulation. At the end of the article, the test result of the circuit system shows that it can remove the disadvantages of the curved structure having large noise in the piezoelectric signal and large harmonics and is more effective at solving the input angular Rate.
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Characterization of the bell-shaped vibratory angular Rate Gyro
Sensors (Switzerland), 2013Co-Authors: Ning Liu, Meng Yin Fu, Hong Liu, Zhong Su, Qing Li, Jun Fang FanAbstract:The bell-shaped vibratory angular Rate Gyro (abbreviated as BVG) is a novel shell vibratory Gyroscope, which is inspired by the Chinese traditional bell. It sensitizes angular velocity through the standing wave precession effect. The bell-shaped resonator is a core component of the BVG and looks like the millimeter-grade Chinese traditional bell, such as QianLong Bell and Yongle Bell. It is made of Ni43CrTi, which is a constant modulus alloy. The exciting element, control element and detection element are uniformly distributed and attached to the resonator, respectively. This work presents the design, analysis and experimentation on the BVG. It is most important to analyze the vibratory character of the bell-shaped resonator. The strain equation, internal force and the resonator's equilibrium differential equation are derived in the orthogonal curvilinear coordinate system. When the input angular velocity is existent on the sensitive axis, an analysis of the vibratory character is performed using the theory of thin shells. On this basis, the mode shape function and the simplified second order normal vibration mode dynamical equation are obtained. The coriolis coupling relationship about the primary mode and secondary mode is established. The methods of the signal processing and control loop are presented. Analyzing the impact resistance property of the bell-shaped resonator, which is compared with other shell resonators using the Finite Element Method, demonstRates that BVG has the advantage of a better impact resistance property. A reasonable means of installation and a prototypal Gyro are designed. The Gyroscopic effect of the BVG is characterized through experiments. Experimental results show that the BVG has not only the advantages of low cost, low power, long work life, high sensitivity, and so on, but, also, of a simple structure and a better impact resistance property for low and medium angular velocity measurements.
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Study on virtual path track control for intelligent vehicle
Proceedings. The 7th International IEEE Conference on Intelligent Transportation Systems (IEEE Cat. No.04TH8749), 2004Co-Authors: Meng Yin Fu, Jiuhong Ruan, Hui DingAbstract:Intelligent vehicle usually needs track some virtual path in short time when it changes lane or avoids obstacle. During this time there may be no lateral error information and that makes lateral error-based controller a functional. In order to solve this problem, one angular Rate Gyro-based virtual path track control method is proposed. Angular Rate Gyro measures vehicle's yaw Rate. Yaw angle is the first integral of the yaw Rate. Yaw Rate and yaw angle are the controller's inputs. Fuzzy logic and look-ahead control are used as control stRategy. In the design process, the controller's parameters are searched and optimized by genetic algorithm, and key vehicle motion parameters select technology and noise-add technology are used to improve the controller's robustness. The simulation results show that the controller can satisfy the accuRate performance in the short period of virtual path track.
Kouji Tsukada - One of the best experts on this subject based on the ideXlab platform.
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soi Rate Gyro sensor for automotive control
Sensors and Actuators A-physical, 2006Co-Authors: Yutaka Nonomura, Norio Fujitsuka, K. Mizuno, Makoto Fujiyoshi, Yoshiteru Omura, Kouji TsukadaAbstract:Abstract A silicon on insulator (SOI) Rate Gyro sensor has been developed for automotive controls. The sensor detects yaw Rate of automobiles. The sensor has a new open beam structure (OBS). Excitation and detection electrodes of the OBS are open toward exterior bonding pads in a plane. The FEM analysis results showed the OBS was superior to other structures. The OBS has high independency between excitation and detection modes. This good feature contributed to the stability of vibration mode for the sensor. The sensor was fabricated by the surface micro machining process to miniaturize the size. The measured characteristics show the OBS is suitable for Rate Gyro sensor to be small, highly precise, and low cost.
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quartz Rate Gyro sensor for automotive control
Sensors and Actuators A-physical, 2004Co-Authors: Yutaka Nonomura, Makoto Fujiyoshi, Yoshiteru Omura, Kouji Tsukada, Masayuki Okuwa, Takeshi Morikawa, Nobuyoshi Sugitani, S Satou, N Kurata, S MatsushigeAbstract:Abstract A new quartz Rate Gyro sensor has been developed for automotive controls. The principle of the sensor is detection of the Coriolis force with a vibrator. An H shape vibrator supported with a stem at its center was used. The vibrator supported at the center was good for the isolation of a small detection motion from a large excitation motion. A new mechanical coupling model and the FEM analysis were used to reduce output offset of the sensor. The detection range of the sensor is from −100 to 100°/s. The sensor output offset is small within ±1°/s in the wide temperature range from −30 to 85 °C. The developed quartz Rate sensor satisfied required specifications and wide temperature stability.
P. Oliveira - One of the best experts on this subject based on the ideXlab platform.
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Relative attitude observers for three-platform formations with inertial spread observations
2016 IEEE 55th Conference on Decision and Control (CDC), 2016Co-Authors: Pedro Batista, C. Silvestre, P. OliveiraAbstract:The problem of relative attitude estimation for a formation of three mobile platforms is addressed in this paper. In previous work by the authors Rate Gyro bias has been considered for two of the three platforms. This paper proposes an extended framework that includes Rate Gyro bias estimation for all platforms. In order to do so, two additional vector observations of constant inertial vectors are assumed available, which may be distributed among the platforms. Cascade observers are then proposed, where the first stage acts as a bias observer and the second allows to filter attitude estimates directly on the special orthogonal group. The first is globally exponentially stable and the second is locally input-to-state stable with respect to the errors of the first, with the region of convergence for the initial attitude estimate better described as semi-global. Lastly, simulation results are presented that exemplify the performance of the proposed estimators in the presence of sensor noise.
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CDC - Globally convergent relative attitude observers for three-platform formations
2015 54th IEEE Conference on Decision and Control (CDC), 2015Co-Authors: Pedro Batista, C. Silvestre, P. OliveiraAbstract:This paper presents relative attitude filters for a formation of three mobile platforms based on direction measurements between the platforms, in addition to Rate Gyro readings. In short, relative attitude estimates are initially obtained from the raw direction measurements using a computationally efficient algebraic method, which has no ambiguities. Afterwards, an attitude and Rate Gyro bias observer is proposed, which is also computationally efficient and that provides filtered estimates of both the relative attitude between the platforms and the Rate Gyro bias. The stability is analyzed and it is shown that the error converges to zero for all initial conditions under some mild constraints on the filter gains. Simulation results are presented, in the presence of sensor noise, that illustRate the achievable performance of the proposed solutions.
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Globally convergent relative attitude observers for three-platform formations
2015 54th IEEE Conference on Decision and Control (CDC), 2015Co-Authors: Pedro Batista, C. Silvestre, P. OliveiraAbstract:This paper presents relative attitude filters for a formation of three mobile platforms based on direction measurements between the platforms, in addition to Rate Gyro readings. In short, relative attitude estimates are initially obtained from the raw direction measurements using a computationally efficient algebraic method, which has no ambiguities. Afterwards, an attitude and Rate Gyro bias observer is proposed, which is also computationally efficient and that provides filtered estimates of both the relative attitude between the platforms and the Rate Gyro bias. The stability is analyzed and it is shown that the error converges to zero for all initial conditions under some mild constraints on the filter gains. Simulation results are presented, in the presence of sensor noise, that illustRate the achievable performance of the proposed solutions.
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Set-Valued Observers for attitude and Rate Gyro bias estimation
2012 American Control Conference (ACC), 2012Co-Authors: S. Brás, P. Rosa, C. Silvestre, P. OliveiraAbstract:This paper addresses the problem of attitude and Rate Gyro bias estimation using Set-Valued Observers (SVOs). We propose a singularity-free solution that exploits Rate Gyro measurements and vector observations corrupted by bounded noise providing bounds on the attitude of the rigid body and on the bias of the Rate Gyros. The sensor readings are fused directly by the SVO, without intermediate attitude computation. By taking advantage of the powerful new multi-core processors it is possible to increase the estimator convergence Rate without compromising the execution time. The feasibility of the technique is demonstRated in simulation.
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ACC - Set-Valued Observers for attitude and Rate Gyro bias estimation
2012 American Control Conference (ACC), 2012Co-Authors: S. Brás, P. Rosa, C. Silvestre, P. OliveiraAbstract:This paper addresses the problem of attitude and Rate Gyro bias estimation using Set-Valued Observers (SVOs). We propose a singularity-free solution that exploits Rate Gyro measurements and vector observations corrupted by bounded noise providing bounds on the attitude of the rigid body and on the bias of the Rate Gyros. The sensor readings are fused directly by the SVO, without intermediate attitude computation. By taking advantage of the powerful new multi-core processors it is possible to increase the estimator convergence Rate without compromising the execution time. The feasibility of the technique is demonstRated in simulation.
