Tracking and Locking System for Shooter With Sensory Noise Cancellation

Rabik, M. Mohamed; Muthuramalingam, T.

doi:10.1109/jsen.2017.2772316

Cited by 26 publications

(12 citation statements)

References 7 publications

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“…Robustness against sensor noises is crucial for practical control designs. 29 Zero-mean Gaussian white noises are added to the vehicles states with the variances of measurements of 2 × 10 − 5 , 10 − 7 , 10 − 4 , and 10 − 7 for v ( t ) , r ( t ) , φ ( t ) , and φ · ( r ) respectively. First-order actuator dynamics are also assumed with time constant of τ = 0 . 2 s for camber control.…”

Section: Simulation Resultsmentioning

confidence: 99%

Active camber system for lateral stability improvement of urban vehicles

Ataei

Tang

Khajepour

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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A suspension system with the capability of cambering has an additional degree of freedom for changing camber angle to increase the maximum lateral tire force. This study investigates the effects of cambering on overall vehicle stability with emphasis on applications to urban vehicles. A full vehicle model with a reliable tire model including camber effects is employed to investigate the vehicle dynamics behavior under cambering. Besides, a linearized vehicle model is used to analytically study the effects of camber lateral forces on vehicle dynamics. Vehicle behavior for different configurations of camber angles in front and rear wheels is studied and compared. Then, an active camber system is suggested for improvement of vehicle lateral stability. Specifically, performances of active front camber, active rear camber, and their combination are investigated. The results show that a proper strategy for camber control can improve both yaw rate and sideslip angle, simultaneously. Finally, the active front camber system is compared with the well-known active front steering. It is shown that, utilizing more friction forces at the limits, active front camber is more effective in improving maneuverability and lateral stability than active front steering.

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Section: Simulation Resultsmentioning

confidence: 99%

Active camber system for lateral stability improvement of urban vehicles

Ataei

Tang

Khajepour

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…Additionally, in consideration of the error caused by sensor noise, Kalman filter estimation is applied on the output of the sensor to remove sensor noise. According to Rabik and Muthuramalingam, 35 the method of noise cancellation is superior to the conventional and running average method. In accordance with QC/T 545-1999, the output force characteristics of SADHPIS are tested at a speed of 1.25 m/s (equivalent displacement input of 2 Hz and 100 mm), and the test is conducted in a hydraulic servo vibration-testing machine numerically controlled by an Instron 8800 computer.…”

Section: Bench Testmentioning

confidence: 99%

Modelling and control of a semi-active dual-chamber hydro-pneumatic inerter-based suspension system

Zhu

Wang

Lin

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part D:

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This study develops a new type of semi-active dual-chamber hydro-pneumatic inerter-based suspension (SADHPIS) based on the ‘inerter–spring–damping’ vibration isolation system and semi-active control. The mathematical model of SADHPIS is linearised to match the nonlinear SADHPIS system with a linear control strategy, and the equivalent parameters are calculated. A linear–quadratic–Gaussian (LQG) controller that matches the nonlinear characteristics of the SADHPIS system is designed. Furthermore, the performance of a quarter-vehicle model with SADHPIS is analysed and compared with that with normal semi-active hydro-pneumatic suspension (SAHPS). Simulation results show that the performance of SADHPIS is better than that of SAHPS, indicating that ride comfort and handle stability are improved greatly in SADHPIS. A prototype is also developed, and a comparative bench test is conducted to verify the accuracy of the simulations. SADHPIS can realise adjustable inertia with a small space and low energy consumption. This work provides new insights for research on variable inertia, promotes the matching of inerters and hydro-pneumatic suspension systems and further proves the practical application value of hydro-pneumatic inerter-based suspension.

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“…Where k p and k i are proportional and integral coefficients respectively. 18 The d -axis feed-forward term represented as G fd ( · ) , compensates the q -axis current coupling. The q -axis feed-forward term represented as G fq ( · ) , compensates the d -axis current coupling and the back EMF voltage drop.…”

Section: System Modelingmentioning

confidence: 99%

Variable step control to improve scanning speed of gene sequencing stage

Zhou

Zheng

Wang

et al. 2021

Measurement and Control

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High-speed scanning is a huge challenge to the motion control of step-scanning gene sequencing stage. The stage should achieve high-precision position stability with minimal settling time for each step. The existing step-scanning scheme usually bases on fixed-step motion control, which has limited means to reduce the time cost of approaching the desired position and keeping high-precision position stability. In this work, we focus on shortening the settling time of stepping motion and propose a novel variable step control method to increase the scanning speed of gene sequencing stage. Specifically, the variable step control stabilizes the stage at any position in a steady-state interval rather than the desired position on each step, so that reduces the settling time. The resulting step-length error is compensated in the next acceleration and deceleration process of stepping to avoid the accumulation of errors. We explicitly described the working process of the step-scanning gene sequencer and designed the PID control structure used in the variable step control for the gene sequencing stage. The simulation was performed to check the performance and stability of the variable step control. Under the conditions of the variable step control where the IMA6000 gene sequencer prototype was evaluated extensively. The experimental results show that the real gene sequencer can step 1.54 mm in 50 ms period, and maintain a high-precision stable state less than 30 nm standard deviation in the following 10 ms period. The proposed method performs well on the gene sequencing stage.

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Tracking and Locking System for Shooter With Sensory Noise Cancellation

Cited by 26 publications

References 7 publications

Active camber system for lateral stability improvement of urban vehicles

Active camber system for lateral stability improvement of urban vehicles

Modelling and control of a semi-active dual-chamber hydro-pneumatic inerter-based suspension system

Variable step control to improve scanning speed of gene sequencing stage

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