Tibialis Static Lock (TSL™) Version 3.0: Sensor-Guided Multi-Lock Cyber-Physical Architecture for Programmable Seated Isometric Force Routing, Mechanical Dose Control, and Work-Embedded Human Feedback

Abstract

Tibialis Static Lock (TSL™) Version 3.0 presents an open-science experimental engineering framework for a sensor-guided multi-lock cyber-physical system based on voluntary seated isometric force generation. It extends the foundational dual-boundary TSL configuration and the Version 2.0 force–geometry–dose–task framework through two coupled contributions: a multi-lock mechanical state space and sensor-guided human-in-the-loop control. Four candidate constrained force-routing states are defined: L1, the canonical frontal dual-boundary lock; L2, a medial-lateral rotational lock; L3, a plantar-posterior compression lock; and L4, a crossed-limb self-reaction lock. Reaction geometry and contact topology are treated as experimental variables. The human remains the voluntary force generator, while the apparatus establishes reaction boundaries and the sensing and controller layers support measurement, state identification, geometry verification, feedback, and protocol execution. The framework specifies lock-dependent sensor observations, calibration and data-validity gates, geometry-consistent reaction closure, commanded-versus-estimated geometry, lock classification, force-target tracking, force–time exposure, mechanical dose descriptors, recovery control, programmable lock sequencing, and session traceability. A finite-state architecture organizes preparation, voluntary loading, verified holding, force reduction, release, recovery, reconfiguration, and fault handling. Visual, auditory, and haptic feedback are considered as comparative interface modalities. Work-Embedded Biomechanical Activation is investigated as the coexistence of controlled mechanical exposure and concurrent seated work. The proposed research program separates mechanical validity, repeatability, lock differentiation, human factors, electromyographic measurements, physiological outcomes, and task compatibility. It includes experimental control conditions, staged evidence gates, branch-specific falsification criteria, and a prospective non-inferiority framework for concurrent-task performance. The related filed foundation is identified in the document as U.S. Provisional Patent Application No. 64/142,894, filed on 28 August 2026. Version 3.0 distinguishes this foundation from subsequent scientific developments and newly disclosed experimental architectures; it does not represent every Version 3.0 element as expressly disclosed in that filing. This publication specifies a testable architecture rather than a validated device or a completed efficacy study. No Version 3.0 biomechanical, neuromuscular, physiological, workplace-performance, clinical, therapeutic, or regulatory outcome is represented as established. Mechanical dose is not medical dose, sensor measurement is not physiological interpretation, and feedback cues do not establish a biological need for activation. Hardware realization, executable controller implementation, and empirical validation remain separate development milestones. 𝗠𝗘𝗧𝗔𝗗𝗔𝗧𝗔 & 𝗧𝗥𝗔𝗖𝗘𝗔𝗕𝗜𝗟𝗜𝗧𝗬 𝗦𝗰𝗶𝗲𝗻𝘁𝗶𝗳𝗶𝗰 𝗽𝗿𝗲𝗱𝗲𝗰𝗲𝘀𝘀𝗼𝗿𝘀:TSL™ Version 1.0 — Zenodo DOI 10.5281/zenodo.22140395TSL™ Version 2.0 — Zenodo DOI 10.5281/zenodo.22206666 𝗣𝗮𝘁𝗲𝗻𝘁 𝘁𝗿𝗮𝗰𝗲𝗮𝗯𝗶𝗹𝗶𝘁𝘆: U.S. Provisional Patent Application No. 64/142,894, filed 28 August 2026𝗩𝗲𝗿𝘀𝗶𝗼𝗻: 3.0𝗣𝘂𝗯𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻 𝗱𝗮𝘁𝗲: 8 September 2026𝗘𝗱𝗶𝘁𝗼𝗿𝗶𝗮𝗹 𝗿𝗲𝘃𝗶𝘀𝗶𝗼𝗻: 8 September 2026𝗔𝘂𝘁𝗵𝗼𝗿: Pavel Pushkin — Independent Inventor and Researcher𝗢𝗥𝗖𝗜𝗗: https://orcid.org/0009-0006-4905-1249