We present the results of a study aimed at determining the simulation realism that might be achieved using reduced-degree-of-freedom flight simulator motion bases. More specifically, the quality of motion produced by two different three-degree-of-freedom platforms was compared to that produced by a conventional six-degree-of-freedom Stewart platform. The three-degree-of-freedom motion bases investigated were a spherical mechanism allowing only rotational motions, as well as a motion base capable of heave, pitch, and roll motions. To compare the different motion bases, three characteristic maneuvers were simulated using a nonlinear model of a Boeing 747. The aircraft motions were then simulated on nine different combinations of virtual motion platforms and motion base drive algorithms. The motion cues (specific forces and angular velocities) produced in this manner were then graphically compared. The analysis revealed that, in most cases, a three-degree-of-freedom simulator is capable of producing motion simulation quality comparable to that produced by a six-degree-of-freedom Stewart platform

Motion Simulation Capabilities of Three-Degree-of-Freedom Flight Simulators

Inthispaperweproposeanewmotionsimulatorbasedonatendon-controlledtensegritystructure.Thesimulator isequipped with anonlinearcontrollerthatachievesrobusttrackingofdesired motions.Thecontrollerparameters can be tuned to guarantee tracking to within a prespecie ed tolerance and with a prescribed rate of exponential convergence. The design is verie ed through numerical simulations forspecie clongitudinal motions of a symmetric aircraft.

/pdf/tensegrity-flight-simulator-54f68jfu6r.pdf

Tensegrity Flight Simulator

This paper presents a driving simulation whose aim is twofold: (1) to investigate the possibility of reducing motion clearance to achieve compact and low-cost driving simulators and (2) to evaluate multimodal and immersive virtual reality motion restitution in platooning driving The choice has been made for a driving simulator having at least two degrees of freedom (DOF) These consist of the longitudinal displacement and seat rotations The simulator is also equipped with a force feedback steering wheel for virtual drive assistance These components are gathered on a serial kinematics-type platform to facilitate a control scheme and avoid the architecture complexity A comparative study was made to devise a motion cueing strategy, taking into account both the psychophysical and technological constraints Experimentations were carried out for several case combinations of the longitudinal displacement and seat rotations

/pdf/design-and-control-of-a-small-clearance-driving-simulator-2vbbeycf5d.pdf

Design and Control of a Small-Clearance Driving Simulator

This paper deals with motion control problem for a 2 DOF small driving simulator. The main idea is to test and compare performances of different washout algorithms applied to such platform category. The experimentations allow us to have the best compromise between quality of the perception (sensation), implementation complexity and platform architecture. Implementation of different washout algorithms (optimal, adaptive and classical one) are discussed. Only the longitudinal restitution is studied. The results show that there is not significant differences between these approaches using with platform type. The lack of pitch DOF in our simulator does not allow a restitution of the sustained acceleration and no coordination between longitudinal and pitch channels may be done

/pdf/motion-cueing-algorithms-for-small-driving-simulator-4i9qg48xfv.pdf

Motion cueing algorithms for small driving simulator

Real road vehicle tests are time consuming, laborious, and costly, and involve several safety concerns Road vehicle motion simulators (RVMS) could assist with vehicle testing, and eliminate or reduce the difficulties traditionally associated with conducting vehicle tests However, such simulators must exhibit a high level of fidelity and accuracy in order to provide realistic and reliable outcomes In this paper, we review existing RVMS and discuss each of the major RVMS subsystems related to the research and development of vehicle dynamics The possibility of utilising motion simulators to conduct ride and handling test scenarios is also investigated

Vehicle motion simulators, a key step towards road vehicle dynamics improvement

Concepts for flight simulator motion-drive algorithms range from the most basic to the relatively complex, with little to guide a choice between these, short of implementing them all and choosing the best. To avoid this lengthy process and to put into practice the experience gained in a previous large-scale evaluation exercise, a flexible motion algorithm has been implemented. It can be run as a simple classical algorithm with few free parameters and can be quickly adjusted to yield good motion performance. The more sophisticated adaptive features of the algorithm can then be brought in gradually to improve performance. Various forms of cost functions and adaptive features were formulated and subsequently evaluated on a synergistic 6 degrees-of-freedom motion-base simulator. It was found that a fourth-order cost function coupled with adaptive gain filters yielded the most favorable results. Finally, a supervisory code to ease motion adjustment and to provide a safe interactive interface with the designer is described. This facility permits reduced turnaround time during motion tuning and allows the pilot to experience different motions back-to-back for easier comparison. The supervisory control also allows automatic motion adjustment to different flight conditions. Nomenclature§ aAA

J. Kirdeikis

Papers

Adaptive Simulator Motion Software with Supervisory Control