An Initial Value Calibration Method for the Wheel Force Transducer Based on Memetic Optimization Framework

Abstract

Some initial values of the wheel force transducer (WFT) change after being mounted in the vehicle. The traditional static calibration is inadequate to fully obtain these initial values. Aiming to this problem, an online initial value calibration method is proposed. The method does not require any additional calibration equipment or manual operation and just requires the vehicle mounted with the WFT to be driven on a flat road with constant speed. In this way, an initial value mode is constructed and then converted to an optimization problem. To solve this problem and acquire the right initial value, an improved Memetic framework based on particle swarm optimization (PSO) and Levenberg-Marquardt (LM) is adopted. To verify the effect of the proposed method, the real WFT data is used and the comparative test is carried out. The experiment result shows that the proposed method is superior to the traditional one and can improve the measurement accuracy effectively.

The inertial effect of acceleration fields on a self-decoupled wheel force transducer

“…Some design issues of WFT can be introduced for inertia coupling analysis. Lin et al, 2013;Lin et al, 2014;Chen et al, 2014).…”

“…From all beginnings on the multi-axis force sensors, researchers are making great efforts to reduce the cross coupling errors in the dimensions. Techniques are mainly covered by two categories, one is the structure optimization that force/moment self-decoupled transducers are designed to eliminate the coupling interferences (Kim et al, 2003;Wu et al, 2011a), the other is the signal decoupling that multi-axis coupling interferences are reduced by using various data algorithms and related methods (Ma et al, 2013;Lin et al, 2013;Chen et al, 2014). Apparently, a well-designed structure with optimization is the primary target while the signal processing is always acting on the basis of structure decoupling.…”

A Measuring Instrument for Off-road Vehicle Performance Testing

“…Resistance strain gauges were placed on the elastic beam to sense the deformation. The position of the resistance strain gauges was designed specially [20]. The measurement of the longitudinal force (Fx) is shown as an example.…”

A mechanical approach of overload protection mechanism for a heavy truck wheel force transducer

“…Southeast University (SEU, China) has devoted over ten years to developing the instrument. Some prototypes ( Figure 1) and published papers are available (Lin et al, 2013(Lin et al, , 2014Wang et al, 2011Wang et al, , 2014. Generally, as an on-board instrument for wheel forces measurement, the WFT consists of a multi-axis force sensor (MFS) (Song et al, 2007) in which an elastic-body will deform under the applied forces.…”