Papers by Keyword: Gyroscope

Abstract: Industrial robots are increasingly used to automate technological processes, such as machining, welding, paint coating, assembly, etc. Automation rationalizes material flows, integrates production facilities and reduces the need for manufacturing inventory, provides cost savings for human maintenance. Technology development and growing competition have an influence on production growth and increase of product quality, and thus the new possibilities in innovation of industrial robot are searched for. One of the possibilities is applying of an inertial navigation system into robot control. This article focuses on new trends in manufacturing technology: design of Inertial Measurement Unit (IMU) for a robotic application control. The Arduino platform is used for the IMU as a hardware solution. The advantage of this platform is low cost and wide range of sensors and devices that are compatible with this platform. For scanning, the MEMS sensor MPU6050 is used, which includes a 3-axis gyroscope and an accelerometer in one chip. New trends in manufacturing facilities, especially robotics innovation and automation, will enable the productivity to grow in production processes.

Abstract: Obtained a complete mathematical model of motion of unbalanced three-axis gyroscope, based on which was studied the influence of gravity anomalies on the precessional motion of single gyroscope gravimeter. There are research results of mathematical modeling of gravitational perturbations impact on precessional movement of gyroscope. The results have showed a proportional relationship between the value of gravitational perturbations and the precession angle, and have proved that increase in rotor center-of-gravity shift leads to a proportional increase in gravitational perturbations impact. The obtained results may be practically used in designing sensors of gravity anomalies, the knowledge of which (gravity anomaly) is used in mineral exploration and inertial navigation.

Abstract: Gyroscope is an orientation determining sensor whose performance is mainly dependant on one of the critical element called the gimbal flexure. Thinner the flexure, better is the performance. To have sufficient strength, M300 maraging steel is used to fabricate the thin flexures machined by Electrical Discharge Machining (EDM) process down to the required thickness of 0.05 mm in various stages. After the EDM processing, the recast layer formed can cause degradation in the microstructure and mechanical properties. Micro-abrasive machining was carried out to remove the recast layer. An attempt was made to understand the changes that occurred after EDM and after micro-abrasive machining with respect to the microstructure using optical and Scanning Electron Microscopy (SEM) and with respect to mechanical properties using nanoindentation. Nanoindentation technique was adopted as the recast layer was just few microns thick. Indentations were carried out on the base material, as EDM cut flexure, and the micro-abrasive machined EDM cut flexure to obtain elastic modulus and hardness values for each condition and the results were analyzed.

Abstract: A new approach substitutes the damper of a passenger car by a cardanic gimbaled flywheel mass. The constructive design leads to a rotary damper in which the vertical movement of the wheel carrier leads to revolution of the rotational axis of the flywheel. In this arrangement, the occurring precession moments are used to control damping moments and to store vibration energy. Different damper characteristics are achieved by different velocities of the inner ring. From almost zero torque output to high torque output, this damper has a huge spread. In this paper a control concept for a LQR is presented. The objective of the control is an adequate motion of the gyroscope to a desired damping characteristic of a passenger car.

Abstract: A novel CMOS interface circuit with high resolution is designed and realized to achieve the integration of interface circuit for liquid suspended rotor micro-gyroscope. The detecting circuit adopts continuous-time current sensing circuit for capacitance measurement. The equivalent output noise power spectral density of phase-sensitive demodulation is 120 nV/Hz1/2. The whole circuitry is realized with 0.5 μm 2P2M CMOS process and its testing results show the circuit has a relative capacitance resolution of 1×10-8, in which the power supply is 18 V and the power consumption is 30 mW. The area of the chip is merely 18.5 mm2.

Abstract: The paper presents a data acquisition system, which uses a high resolution AD and low noise operational amplifier with ADXRS649 gyroscope.The design has realized the reliable read the gyroscope data, and motion detection system using interrupt function, reducing system power consumption, has very high practical value.

Abstract: In this paper a low-cost Micro-Electro-Mechanical System (MEMS) inertial measurement unit is designed, a 3-axis accelerometer and 3-axis gyroscope simulated 6 degrees of freedom orientation sensing through sensor fusion. By analyzing a simple complimentary filter and a more complex Kalman filter, the outputs of each sensor were combined and took advantage of the benefits of both sensors to improved results. The experimental results demonstrate that the output signal can be corrected suitability by means of the proposed method.

Abstract: This paper discusses the body posture detection problem using low cost Micro-Electro-Mechanical System (MEMS) inertial sensors, for which a complementary sensor fusion solution is proposed. Considering the impact from the noise and bias drifts, through Kalman filter to complete the multi-sensor information fusion, achieved an accurate attitude determination. The experimental results show that, after using Kalman filtering algorithm to fuse acceleration sensor and signal gyroscope, it can effectively eliminate the accumulative error and significantly better dynamic characteristics of attitude angle measurement, Improving the reliability and accuracy of body posture estimation.

Abstract: MEMS inertial sensors using underground azimuth measurement, with small size, high accuracy, low cost and good stability, the control and drive system is very important. This paper presents the autonomous underground azimuth measurement drive system based on MEMS gyroscope. Using MEMS gyroscope as a measuring element, driven by a brushless DC motor, using a combination of photoelectric encoder, according to the underground azimuth measurement principle, this paper proposed a autonomous measurement method, discussing the design principles of the program, the components of the system, and the communication problems between the gyroscope and other part. Overcoming the high cost of traditional logging tool and the complex control problem, experimental results verify that the system is able to achieve underground azimuth measurement purposes. Error in 1.5°or less, with outstanding engineering applications.

Abstract: The main controller STM32F103VET6 was used as the core of the system. The change of angle and angular velocity was detected by accelerometer and gyroscope built-in six axis attitude sensor MPU6050. The double closed-loop control was used to regulate the speed of DC motor JGA25-371, so as to adjust the posture of the robot. Test shows that the whole system design is simple, good stability and anti-jamming.