A Father's Empathy, A CTO's Execution
Pioneering active, ungrounded neurorehabilitation for pediatric hypotonia—replacing rigid mechanical immobilization with responsive kinesthetic cueing.
The Personal Origin: Alwin's Diagnosis
When my son Alwin was diagnosed with Charcot-Marie-Tooth Type 1B (CMT1B), our family faced a daunting neurological reality: a mutation in the myelin protein zero (MPZ) gene that slows peripheral nerve conduction velocity to under 15 m/s, producing a severe 200 ms sensorimotor reflex latency and generalized muscular hypotonia.
Standard clinical orthotics offered only static, rigid plastic corsets and standing frames. While these hold a fragile child artificially upright, they bypass the child's muscular system entirely, causing progressive paraspinal disuse atrophy and sensory learned non-use.
Observing hands-on Dynamic Movement Intervention (DMI) therapy sessions revealed a transformative alternative: children with hypotonia do not need rigid external scaffolding—they need sub-maximal, precisely timed tactile prompts at distal key points. That insight became Active Kinesthetic Cueing (BalanceImpulse): providing ungrounded micro-second torque bursts (<1.5 Nm) that awaken the child's own postural righting reflexes.
From Living Room Insight to MedTech Rigor
Read the unabridged story of how parental dedication, first-principles physics ($T = I \cdot \alpha$), and automated multi-agent engineering transformed an urgent family need into a validated pediatric medical platform.
- CMT1B 200 ms Sensorimotor Reflex Delay Compensation
- ≤ 1.5 Nm Pediatric Torque Ceiling (Zero Startle Shock)
- 100% Ungrounded Reaction Momentum (No Rigid Bracing)
Balance Bionics & Mitti: The 10-Year Platform
We cleanly decouple our 10-year deep-tech corporate platform from our compassionate pediatric product line.
The Deep-Tech & IP Platform
Balance Bionics is our European deep-tech holding and intellectual property vehicle. It houses our 5 patent candidate filings [IP-SCHUTZ: 1–5], our non-dilutive grant applications (BMBF KMU-innovativ, ZIM, SPRIND, EIC Accelerator), and our 10-year technology-agnostic roadmap scaling ungrounded momentum exchange into adult neurorehabilitation, gait stabilization, and industrial assistive robotics.
- ✓Proprietary reaction-wheel momentum exchange IP portfolio
- ✓Non-dilutive deep-tech funding strategy (TRL 3 to TRL 6)
- ✓Universal architecture for pediatric and adult neuro-recovery
The Pediatric Assistive Wearable
Mitti is our flagship pediatric product brand—engineered with deep parental care for children with muscular hypotonia and peripheral demyelinating neuropathies. Designed as a soft, non-stigmatizing pelvic wearable (<250g capsule), Mitti preserves full body freedom while providing sub-maximal Active Kinesthetic Cueing to stimulate neuroplasticity.
- ✓Pediatric safety envelope: ≤ 1.5 Nm torque, < 50°C thermal limit
- ✓CE MDR Class I/IIa medical device compliance pathway
- ✓Ergonomic magnetic quick-release harness with zero fear factor
Genesis & Active Kinesthetic Cueing
Observing hands-on DMI physical therapy sessions led to a foundational breakthrough: children with hypotonia don't need heavy, rigid exoskeletons — they need gentle, micro-second tactile cues to awaken their own postural reflexes.
Key Deliverables & Milestones
- Formulation of the ungrounded reaction wheel stabilization concept (T = I · α)
- Initial 3D CAD kinematic packaging and modular harness ergonomics
- Establishment of the 12-persona multi-disciplinary AI engineering team
MuJoCo SITL Simulation & Physics Validation
Before physical fabrication, we constructed rigorous multi-body physics simulations in MuJoCo SITL to validate that ungrounded reaction wheels can effectively stabilize pediatric inverted pendulum dynamics within motor electromagnetic saturation limits.
Key Deliverables & Milestones
- Multi-body pediatric biomechanics model with realistic hypotonic compliance
- Electromagnetic motor saturation and inertia sweep verification (Gate 1 sign-off)
- 3-stage graduated failsafe simulation with zero recoil whiplash
Heavy Mode Proving Ground & Testbed
Hardware-in-the-Loop bench validation using high-power ODrive D6374 150KV / Maxon EC90 motors, ODrive FOC controllers, and non-blocking ESP32 firmware loops to stress-test real-world dynamic response, thermal limits, and failsafe timing.
Key Deliverables & Milestones
- ODrive D6374 / Maxon EC90 + ODrive physical test bench verification
- Deterministic non-blocking ESP32 firmware (<1ms loop latency, zero delay())
- Pediatric 1.5 Nm torque governor and <50°C thermal envelope validation
Clinical Trials & CE/MDR Certification
Transition from laboratory proving ground to supervised clinical pilot trials in pediatric therapy centers, accompanied by full EU MDR 2017/745 Class I/IIa regulatory documentation.
Key Deliverables & Milestones
- ISO 14971 Risk Management & IEC 62304 Software Lifecycle Technical Files
- Multi-center clinical pilot evaluation with certified DMI physiotherapists
- Miniaturized <150g wearable hip module with magnetic Poka-Yoke quick-connect harness
The "1 + AI" Multidisciplinary Factory
Mitti operates on a hybrid engineering model: human paternal direction (P0: CTO Dad) paired with 11 domain-specialized AI personas (P1–P11) governed by 4 non-negotiable Decision Gates.
The 4 Non-Negotiable Decision Gates
Formal Quality GovernancePhysical Feasibility
First-principles verification of torque generation and motor physics.
Medical & Thermal Safety
Pediatric physiological protection and fail-safe operation.
Clinical Benefit
Active motor learning and spinal symmetry protection.
Alwin Usability
Child and family user experience, ergonomics, and Poka-Yoke safety.
Persona Registry (P0–P11)
12 Specializations ActiveProduct Owner (CTO Dad)
Vision, Prioritization & Ultimate Decision Authority
"Evaluate every concept against real-world benefit for Alwin today. Reject ideas that don't improve mobility or safety — regardless of technical elegance or commercial hype."
- Weight <150g per hip actuator module
- Zero fear factor or discomfort for pediatric user
- Prioritizes immediate real-world daily utility
*Embedded Software Engineer
Firmware Architecture & Real-Time Protocols
"Drive battery-efficient, latency-critical, non-blocking firmware. Zero delay() in loops, zero hot-path heap allocations, thin ISR callbacks."
- ESP-NOW master/slave communication (<10ms broadcast)
- Stack-only buffer allocations with snprintf
- Sub-millisecond real-time loop execution
src/, lib/, test/Mechatronics Engineer
Actuator Hardware, Motors & CAD Design
"Maximize mechanical power density while minimizing weight and size. Iterate on materials and drive concepts for optimal torque transfer."
- Slotless BLDC (Alva STM) & ODrive D6374 / Maxon EC90 Flat integration
- Parametric CadQuery modular harness mounts
- 7.5A blade fuse and INA226 power telemetry
manufacturing/, docs/08_*Control Systems Engineer
Sensor Fusion, PID & Postural Filters
"Develop and implement filters, models, and control loops to translate raw sensor telemetry into therapeutically useful corrective reactions without overshoot."
- Complementary 6-DoF IMU sensor fusion
- Sawtooth torque shaping with phase-reset
- Anti-windup PID control with deadband filtering
lib/shared/, src/hub/System Physicist
First-Principles Physics & SITL Simulation
"Challenge every concept on first-principles physical feasibility. Prevent magical thinking by verifying T = I · α against motor electromagnetic limits in MuJoCo."
- MuJoCo multi-body pediatric inverted pendulum model
- Electromagnetic motor saturation validation
- Clean SITL parameter sweeps with automated logging
simulation/, docs/07_*Safety Engineer
Failsafe Architecture & Hazard Mitigation
"Question every hardware and software concept for potential hazards. Demand absolute fail-safety and redundant cutoffs. Accept zero residual technical risk for pediatric patients."
- 1.5 Nm pediatric torque hard ceiling (2.0 Nm cutoff)
- Motor surface temperature strictly <50°C
- 3-stage graduated failsafe (200ms/500ms/1000ms)
Safety paths in src/, lib/MDR Regulatory Expert
Medical Device Regulations & Standards Compliance
"Ensure design decisions, material selection (biocompatibility), and software architecture remain certifiable under EU Medical Device Regulation (MDR 2017/745)."
- ISO 14971 Risk Management compliance
- IEC 62304 Software Lifecycle governance
- Biocompatible skin-contact materials classification
docs/, specs/DMI Physiotherapist
Dynamic Movement Intervention & Challenge Calibration
"Continuously seek the 'sweet spot' of maximum challenge. Configure system behavior that intervenes only at the last moment, prompting the patient to self-correct posture."
- Translates DMI tactile facilitation into active kinesthetic cues (BalanceImpulse)
- Sub-maximal tactile challenge thresholds
- Distal-to-proximal active trunk core facilitation
Mode configs, docs/01_hub/specs/modes/Mototherapist
Gait Kinematics & Dynamic Muscular Recruitment
"Treat learning to walk as playful sport. Use dynamic, action-rich stimuli to 'wake up' muscular hypotonia and provide an energetic pace-maker for fluid forward motion."
- Asymmetric sawtooth dithering prevents neural adaptation
- Rhythmic walking metronome synchronization
- Dynamic cadence pacing for fluid locomotion
Gait mode, dithering logicKinder-Physiotherapeutin
Pediatric Fatigue & Cardiovascular Protection
"Monitor cardiovascular and muscular load limits precisely. Demand intelligent logic that recognizes exhaustion patterns and throttles the system before overexertion."
- Continuous fatigue monitoring telemetry for all users
- Optional HCM (Hypertrophic Cardiomyopathy) soft-mode throttling
- Overexertion prevention via telemetry thresholds
Fatigue/HCM code pathsPädiatrischer Orthopäde
Spinal Biomechanics & Scoliosis Prevention
"Evaluate all system impulses and harness concepts strictly for biomechanical impact. Block concepts that could cause asymmetric loading or spinal deformity."
- Dual IMU (thoracic vs. pelvic) differential tracking
- Spinal symmetry enforcement in 3D planes
- Eliminates axial compressive loading on pediatric spine
Scoliosis mode, pelvic IMU extensionErgonomie-Designer
Pediatric UX, Harness Ergonomics & Poka-Yoke Design
"Focus on absolutely frictionless, self-explanatory 'plug-and-play' experience. Design physical and digital interaction points so error-resistant (Poka-Yoke) that no manuals are needed."
- Poka-Yoke magnetic quick-release fasteners
- Self-explanatory AMOLED 1.43" touch interface
- Ultra-soft, washable pediatric-grade harness lining
Manufacturing, display UIEvidence-Based Pediatric Neuroplasticity
In compliance with our single-home content architecture, the complete biomechanical methodologies (Dynamic Movement Intervention, Vojta Reflex Locomotion, Bobath Tone Regulation, and Assist-as-Needed Control) and our 6 clinical operational modes are maintained centrally on our dedicated clinical portal.
Distal micro-prompts provoke active trunk muscle self-recruitment.
Automatic postural righting circuits and bilateral spinal symmetry.
Sawtooth torque dithering prevents sensory neural habituation.
Explore Research Preprints & Technical Specs
Access our scientific publications, interactive MuJoCo physics simulation sandbox, and formal safety guarantees.
Reaction-Wheel Postural Stabilization
Read our scientific preprint on ungrounded reaction-wheel momentum exchange, CMT1B reflex delay modeling, and Real2Sim SITL verification.
MuJoCo Simulation Demo
Test first-principles reaction torque physics ($T = I \cdot \alpha$), parameter sweeps, and inverted pendulum stabilization live in browser.